Merge branch 'backport-schema-changes' into 'master'

Backport the EE schema to CE

Closes gitlab-ee#9686

See merge request gitlab-org/gitlab-ce!26940

.gitlab/ci/rails.gitlab-ci.yml

@@ -111,7 +111,7 @@
   variables:
     SETUP_DB: "false"
   script:
-    - git fetch https://gitlab.com/gitlab-org/gitlab-ce.git v9.3.0
+    - git fetch https://gitlab.com/gitlab-org/gitlab-ce.git v11.11.0
     - git checkout -f FETCH_HEAD
     - sed -i "s/gem 'oj', '~> 2.17.4'//" Gemfile
     - sed -i "s/gem 'bootsnap', '~> 1.0.0'/gem 'bootsnap'/" Gemfile

changelogs/unreleased/backport-schema-changes.yml

+---
+title: Backport the EE schema and migrations to CE
+merge_request: 26940
+author: Yorick Peterse
+type: other

danger/database/Dangerfile

@@ -13,7 +13,6 @@ DB_FILES = [
   'lib/gitlab/github_import/',
   'lib/gitlab/sql/',
   'rubocop/cop/migration',
-  'ee/db/',
   'ee/lib/gitlab/database/'
 ].freeze
 

db/migrate/20161007073613_create_user_activities.rb

+
 class CreateUserActivities < ActiveRecord::Migration[4.2]
-  DOWNTIME = false
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = true
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  DOWNTIME_REASON = 'Adding foreign key'.freeze
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
 
-  # This migration is a no-op. It just exists to match EE.
   def change
+    create_table :user_activities do |t|
+      t.belongs_to :user, index: { unique: true }, foreign_key: { on_delete: :cascade }
+      t.datetime :last_activity_at, null: false
+    end
   end
 end

db/migrate/20161117114805_remove_undeleted_groups.rb

-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class RemoveUndeletedGroups < ActiveRecord::Migration[4.2]
-  DOWNTIME = false
-
-  def up
-    is_ee = defined?(Gitlab::License)
-
-    if is_ee
-      execute <<-EOF.strip_heredoc
-      DELETE FROM path_locks
-      WHERE project_id IN (
-        SELECT project_id
-        FROM projects
-        WHERE namespace_id IN (#{namespaces_pending_removal})
-      );
-      EOF
-
-      execute <<-EOF.strip_heredoc
-      DELETE FROM remote_mirrors
-      WHERE project_id IN (
-        SELECT project_id
-        FROM projects
-        WHERE namespace_id IN (#{namespaces_pending_removal})
-      );
-      EOF
-    end
-
-    execute <<-EOF.strip_heredoc
-    DELETE FROM lists
-    WHERE label_id IN (
-      SELECT id
-      FROM labels
-      WHERE group_id IN (#{namespaces_pending_removal})
-    );
-    EOF
-
-    execute <<-EOF.strip_heredoc
-    DELETE FROM lists
-    WHERE board_id IN (
-      SELECT id
-      FROM boards
-      WHERE project_id IN (
-        SELECT project_id
-        FROM projects
-        WHERE namespace_id IN (#{namespaces_pending_removal})
-      )
-    );
-    EOF
-
-    execute <<-EOF.strip_heredoc
-    DELETE FROM labels
-    WHERE group_id IN (#{namespaces_pending_removal});
-    EOF
-
-    execute <<-EOF.strip_heredoc
-    DELETE FROM boards
-    WHERE project_id IN (
-      SELECT project_id
-      FROM projects
-      WHERE namespace_id IN (#{namespaces_pending_removal})
-    )
-    EOF
-
-    execute <<-EOF.strip_heredoc
-    DELETE FROM projects
-    WHERE namespace_id IN (#{namespaces_pending_removal});
-    EOF
-
-    if is_ee
-      # EE adds these columns but we have to make sure this data is cleaned up
-      # here before we run the DELETE below. An alternative would be patching
-      # this migration in EE but this will only result in a mess and confusing
-      # migrations.
-      execute <<-EOF.strip_heredoc
-      DELETE FROM protected_branch_push_access_levels
-      WHERE group_id IN (#{namespaces_pending_removal});
-      EOF
-
-      execute <<-EOF.strip_heredoc
-      DELETE FROM protected_branch_merge_access_levels
-      WHERE group_id IN (#{namespaces_pending_removal});
-      EOF
-    end
-
-    # This removes namespaces that were supposed to be deleted but still reside
-    # in the database.
-    execute "DELETE FROM namespaces WHERE deleted_at IS NOT NULL;"
-  end
-
-  def down
-    # This is an irreversible migration;
-    # If someone is trying to rollback for other reasons, we should not throw an Exception.
-    # raise ActiveRecord::IrreversibleMigration
-  end
-
-  def namespaces_pending_removal
-    "SELECT id FROM (
-      SELECT id
-      FROM namespaces
-      WHERE deleted_at IS NOT NULL
-    ) namespace_ids"
-  end
-end

db/migrate/20171121135738_clean_up_from_merge_request_diffs_and_commits.rb

-class CleanUpFromMergeRequestDiffsAndCommits < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  class MergeRequestDiff < ActiveRecord::Base
-    self.table_name = 'merge_request_diffs'
-
-    include ::EachBatch
-  end
-
-  disable_ddl_transaction!
-
-  def up
-    Gitlab::BackgroundMigration.steal('DeserializeMergeRequestDiffsAndCommits')
-
-    # The literal '--- []\n' value is created by the import process and treated
-    # as null by the application, so we can ignore those - even if we were
-    # migrating, it wouldn't create any rows.
-    literal_prefix = Gitlab::Database.postgresql? ? 'E' : ''
-    non_empty = "
-      (st_commits IS NOT NULL AND st_commits != #{literal_prefix}'--- []\n')
-      OR
-      (st_diffs IS NOT NULL AND st_diffs != #{literal_prefix}'--- []\n')
-    ".squish
-
-    MergeRequestDiff.where(non_empty).each_batch(of: 500) do |relation, index|
-      range = relation.pluck('MIN(id)', 'MAX(id)').first
-
-      Gitlab::BackgroundMigration::DeserializeMergeRequestDiffsAndCommits.new.perform(*range)
-    end
-  end
-
-  def down
-  end
-end

db/migrate/20180502122856_create_project_mirror_data.rb

@@ -4,17 +4,25 @@ class CreateProjectMirrorData < ActiveRecord::Migration[4.2]
   DOWNTIME = false
 
   def up
-    return if table_exists?(:project_mirror_data)
-
-    create_table :project_mirror_data do |t|
-      t.references :project, index: true, foreign_key: { on_delete: :cascade }
-      t.string :status
-      t.string :jid
-      t.text :last_error
+    if table_exists?(:project_mirror_data)
+      add_column :project_mirror_data, :status, :string unless column_exists?(:project_mirror_data, :status)
+      add_column :project_mirror_data, :jid, :string unless column_exists?(:project_mirror_data, :jid)
+      add_column :project_mirror_data, :last_error, :text unless column_exists?(:project_mirror_data, :last_error)
+    else
+      create_table :project_mirror_data do |t|
+        t.references :project, index: true, foreign_key: { on_delete: :cascade }
+        t.string :status
+        t.string :jid
+        t.text :last_error
+      end
     end
   end
 
   def down
-    drop_table(:project_mirror_data) if table_exists?(:project_mirror_data)
+    remove_column :project_mirror_data, :status
+    remove_column :project_mirror_data, :jid
+    remove_column :project_mirror_data, :last_error
+
+    # ee/db/migrate/20170509153720_create_project_mirror_data_ee.rb will remove the table.
   end
 end

db/migrate/20180503131624_create_remote_mirrors.rb

@@ -29,6 +29,6 @@ class CreateRemoteMirrors < ActiveRecord::Migration[4.2]
   end
 
   def down
-    drop_table(:remote_mirrors) if table_exists?(:remote_mirrors)
+    # ee/db/migrate/20160321161032_create_remote_mirrors_ee.rb will remove the table
   end
 end

db/migrate/20180503141722_add_remote_mirror_available_overridden_to_projects.rb

@@ -10,6 +10,6 @@ class AddRemoteMirrorAvailableOverriddenToProjects < ActiveRecord::Migration[4.2
   end
 
   def down
-    remove_column(:projects, :remote_mirror_available_overridden) if column_exists?(:projects, :remote_mirror_available_overridden)
+    # ee/db/migrate/20171017130239_add_remote_mirror_available_overridden_to_projects_ee.rb will remove the column.
   end
 end

db/migrate/20180503193542_add_indexes_to_remote_mirror.rb

@@ -10,6 +10,7 @@ class AddIndexesToRemoteMirror < ActiveRecord::Migration[4.2]
   end
 
   def down
+    # ee/db/migrate/20170208144550_add_index_to_mirrors_last_update_at_fields.rb will remove the index.
     # rubocop:disable Migration/RemoveIndex
     remove_index :remote_mirrors, :last_successful_update_at if index_exists? :remote_mirrors, :last_successful_update_at
   end

db/migrate/20180503193953_add_mirror_available_to_application_settings.rb

@@ -10,6 +10,6 @@ class AddMirrorAvailableToApplicationSettings < ActiveRecord::Migration[4.2]
   end
 
   def down
-    remove_column(:application_settings, :mirror_available) if column_exists?(:application_settings, :mirror_available)
+    # ee/db/migrate/20171017125928_add_remote_mirror_available_to_application_settings.rb will remove the column.
   end
 end

db/migrate/20171216111734_clean_up_for_members.rb → db/migrate/20190403161806_update_designs_index.rb

+# frozen_string_literal: true
+
 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
 
-class CleanUpForMembers < ActiveRecord::Migration[4.2]
+class UpdateDesignsIndex < ActiveRecord::Migration[5.0]
   include Gitlab::Database::MigrationHelpers
 
   # Set this constant to true if this migration requires downtime.
@@ -9,23 +11,11 @@ class CleanUpForMembers < ActiveRecord::Migration[4.2]
 
   disable_ddl_transaction!
 
-  class Member < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'members'
-  end
-
   def up
-    condition = <<~EOF.squish
-      invite_token IS NULL AND
-      NOT EXISTS (SELECT 1 FROM users WHERE users.id = members.user_id)
-    EOF
-
-    Member.each_batch(of: 10_000) do |batch|
-      batch.where(condition).delete_all
-    end
+    remove_concurrent_index :design_management_designs, :issue_id, unique: true
   end
 
   def down
+    add_concurrent_index :design_management_designs, :issue_id, unique: true
   end
 end

db/migrate/20190409224933_add_name_to_geo_nodes.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddNameToGeoNodes < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def up
+    add_column :geo_nodes, :name, :string
+
+    # url is also unique, and its type and size is identical to the name column,
+    # so this is safe.
+    execute "UPDATE geo_nodes SET name = url;"
+
+    # url is also `null: false`, so this is safe.
+    change_column :geo_nodes, :name, :string, null: false
+  end
+
+  def down
+    remove_column :geo_nodes, :name
+  end
+end

db/post_migrate/20171005130944_schedule_create_gpg_key_subkeys_from_gpg_keys.rb → db/migrate/20190410173409_add_name_index_to_geo_nodes.rb

+# frozen_string_literal: true
+
 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
 
-class ScheduleCreateGpgKeySubkeysFromGpgKeys < ActiveRecord::Migration[4.2]
-  disable_ddl_transaction!
+class AddNameIndexToGeoNodes < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
 
+  # Set this constant to true if this migration requires downtime.
   DOWNTIME = false
-  MIGRATION = 'CreateGpgKeySubkeysFromGpgKeys'
-
-  class GpgKey < ActiveRecord::Base
-    self.table_name = 'gpg_keys'
 
-    include EachBatch
-  end
+  disable_ddl_transaction!
 
   def up
-    GpgKey.select(:id).each_batch do |gpg_keys|
-      jobs = gpg_keys.pluck(:id).map do |id|
-        [MIGRATION, [id]]
-      end
-
-      BackgroundMigrationWorker.bulk_perform_async(jobs)
-    end
+    add_concurrent_index :geo_nodes, :name, unique: true
   end
 
   def down
+    remove_concurrent_index :geo_nodes, :name
   end
 end

db/migrate/20190412183653_remove_url_index_from_geo_nodes.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RemoveUrlIndexFromGeoNodes < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index :geo_nodes, :url
+  end
+
+  def down
+    add_concurrent_index :geo_nodes, :url, unique: true
+  end
+end

db/migrate/20190414185432_add_comment_to_vulnerability_feedback.rb

+# frozen_string_literal: true
+
+class AddCommentToVulnerabilityFeedback < ActiveRecord::Migration[5.1]
+  DOWNTIME = false
+
+  def up
+    add_column :vulnerability_feedback, :comment_author_id, :integer
+    add_column :vulnerability_feedback, :comment, :text
+    add_column :vulnerability_feedback, :comment_timestamp, :datetime_with_timezone
+  end
+
+  def down
+    remove_column :vulnerability_feedback, :comment_author_id
+    remove_column :vulnerability_feedback, :comment
+    remove_column :vulnerability_feedback, :comment_timestamp
+  end
+end

db/migrate/20190415172035_update_insights_foreign_keys.rb

+# frozen_string_literal: true
+
+# rubocop: disable Migration/AddConcurrentForeignKey
+
+class UpdateInsightsForeignKeys < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    remove_foreign_key_if_exists(:insights, column: :project_id)
+    add_foreign_key(:insights, :projects, column: :project_id, on_delete: :cascade)
+
+    remove_foreign_key_if_exists(:insights, column: :namespace_id)
+    add_foreign_key(:insights, :namespaces, column: :namespace_id, on_delete: :cascade)
+  end
+
+  def down
+    remove_foreign_key_if_exists(:insights, column: :namespace_id)
+    add_foreign_key(:insights, :namespaces, column: :namespace_id)
+
+    remove_foreign_key_if_exists(:insights, column: :project_id)
+    add_foreign_key(:insights, :projects, column: :project_id)
+  end
+end

db/migrate/20190418132750_add_foreign_key_from_vulnerability_feedback_to_users.rb

+# frozen_string_literal: true
+
+class AddForeignKeyFromVulnerabilityFeedbackToUsers < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key :vulnerability_feedback, :users, column: :comment_author_id, on_delete: :nullify
+    add_concurrent_index :vulnerability_feedback, :comment_author_id
+  end
+
+  def down
+    remove_foreign_key :vulnerability_feedback, column: :comment_author_id
+    remove_concurrent_index :vulnerability_feedback, :comment_author_id
+  end
+end

db/migrate/20190419121952_add_bridged_pipeline_id_to_bridges.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddBridgedPipelineIdToBridges < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def change
+    add_column :ci_builds, :upstream_pipeline_id, :integer
+  end
+end

db/migrate/20190419123057_add_bridged_pipeline_id_foreign_key.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddBridgedPipelineIdForeignKey < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :ci_builds, :upstream_pipeline_id, where: 'upstream_pipeline_id IS NOT NULL'
+    add_concurrent_foreign_key :ci_builds, :ci_pipelines, column: :upstream_pipeline_id
+  end
+
+  def down
+    remove_foreign_key :ci_builds, column: :upstream_pipeline_id
+    remove_concurrent_index :ci_builds, :upstream_pipeline_id
+  end
+end

db/migrate/20190423124640_add_index_to_projects_mirror_user_id.rb

+# frozen_string_literal: true
+
+class AddIndexToProjectsMirrorUserId < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :projects, :mirror_user_id
+  end
+
+  def down
+    remove_concurrent_index :projects, :mirror_user_id
+  end
+end

db/migrate/20190520200123_add_rule_type_to_approval_merge_request_approval_rules.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddRuleTypeToApprovalMergeRequestApprovalRules < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default(:approval_merge_request_rules, :rule_type, :integer, limit: 2, default: 1)
+  end
+
+  def down
+    remove_column(:approval_merge_request_rules, :rule_type)
+  end
+end

db/migrate/20190528173628_add_index_for_code_owner_rule_type_on_approval_merge_request_rules.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddIndexForCodeOwnerRuleTypeOnApprovalMergeRequestRules < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  INDEX_CODE_OWNERS_RULES_UNIQUENESS_NAME = 'index_approval_rule_name_for_code_owners_rule_type'
+  INDEX_CODE_OWNERS_RULES_QUERY_NAME = 'index_approval_rules_code_owners_rule_type'
+
+  class ApprovalMergeRequestRule < ActiveRecord::Base
+    include EachBatch
+
+    enum rule_types: {
+      regular: 1,
+      code_owner: 2
+    }
+  end
+
+  def up
+    # Ensure only 1 code_owner rule per merge_request
+    add_concurrent_index(
+      :approval_merge_request_rules,
+      [:merge_request_id, :rule_type, :name],
+      unique: true,
+      where: "rule_type = #{ApprovalMergeRequestRule.rule_types[:code_owner]}",
+      name: INDEX_CODE_OWNERS_RULES_UNIQUENESS_NAME
+    )
+
+    # Support lookups for all code_owner rules per merge_request
+    add_concurrent_index(
+      :approval_merge_request_rules,
+      [:merge_request_id, :rule_type],
+      where: "rule_type = #{ApprovalMergeRequestRule.rule_types[:code_owner]}",
+      name: INDEX_CODE_OWNERS_RULES_QUERY_NAME
+    )
+  end
+
+  def down
+    remove_concurrent_index_by_name(
+      :approval_merge_request_rules,
+      INDEX_CODE_OWNERS_RULES_UNIQUENESS_NAME
+    )
+
+    remove_concurrent_index_by_name(
+      :approval_merge_request_rules,
+      INDEX_CODE_OWNERS_RULES_QUERY_NAME
+    )
+  end
+end

db/migrate/20190603124955_add_index_to_count_pending_mirror_updates.rb

+# frozen_string_literal: true
+
+class AddIndexToCountPendingMirrorUpdates < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :project_mirror_data, [:last_update_at, :retry_count]
+  end
+
+  def down
+    remove_concurrent_index :project_mirror_data, [:last_update_at, :retry_count]
+  end
+end

db/post_migrate/20161128170531_drop_user_activities_table.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
 class DropUserActivitiesTable < ActiveRecord::Migration[4.2]
   include Gitlab::Database::MigrationHelpers
 
   DOWNTIME = false
 
-  # This migration is a no-op. It just exists to match EE.
-  def change
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
+
+  def up
+    drop_table :user_activities if table_exists?(:user_activities)
+  end
+
+  def down
+    unless table_exists?(:user_activities)
+      create_table "user_activities", force: :cascade do |t|
+        t.integer "user_id"
+        t.datetime "last_activity_at", null: false
+      end
+
+      add_index "user_activities", ["user_id"], name: "index_user_activities_on_user_id", unique: true, using: :btree
+    end
   end
 end

db/post_migrate/20170502101023_cleanup_namespaceless_pending_delete_projects.rb

-# This is the counterpart of RequeuePendingDeleteProjects and cleans all
-# projects with `pending_delete = true` and that do not have a namespace.
-class CleanupNamespacelessPendingDeleteProjects < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    @offset = 0
-
-    loop do
-      ids = pending_delete_batch
-
-      break if ids.empty?
-
-      args = ids.map { |id| Array(id) }
-
-      NamespacelessProjectDestroyWorker.bulk_perform_async(args)
-
-      @offset += 1
-    end
-  end
-
-  def down
-    # noop
-  end
-
-  private
-
-  def pending_delete_batch
-    connection.exec_query(find_batch).map { |row| row['id'].to_i }
-  end
-
-  BATCH_SIZE = 5000
-
-  def find_batch
-    projects = Arel::Table.new(:projects)
-    projects.project(projects[:id])
-      .where(projects[:pending_delete].eq(true))
-      .where(projects[:namespace_id].eq(nil))
-      .skip(@offset * BATCH_SIZE)
-      .take(BATCH_SIZE)
-      .to_sql
-  end
-end

db/post_migrate/20170703130158_schedule_merge_request_diff_migrations.rb

-class ScheduleMergeRequestDiffMigrations < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  BATCH_SIZE = 2500
-  MIGRATION = 'DeserializeMergeRequestDiffsAndCommits'
-
-  disable_ddl_transaction!
-
-  class MergeRequestDiff < ActiveRecord::Base
-    self.table_name = 'merge_request_diffs'
-
-    include ::EachBatch
-  end
-
-  # Assuming that there are 5 million rows affected (which is more than on
-  # GitLab.com), and that each batch of 2,500 rows takes up to 5 minutes, then
-  # we can migrate all the rows in 7 days.
-  #
-  # On staging, plucking the IDs themselves takes 5 seconds.
-  def up
-    non_empty = 'st_commits IS NOT NULL OR st_diffs IS NOT NULL'
-
-    MergeRequestDiff.where(non_empty).each_batch(of: BATCH_SIZE) do |relation, index|
-      range = relation.pluck('MIN(id)', 'MAX(id)').first
-
-      BackgroundMigrationWorker.perform_in(index * 5.minutes, MIGRATION, range)
-    end
-  end
-
-  def down
-  end
-end

db/post_migrate/20170926150348_schedule_merge_request_diff_migrations_take_two.rb

-class ScheduleMergeRequestDiffMigrationsTakeTwo < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  BATCH_SIZE = 500
-  MIGRATION = 'DeserializeMergeRequestDiffsAndCommits'
-  DELAY_INTERVAL = 10.minutes
-
-  disable_ddl_transaction!
-
-  class MergeRequestDiff < ActiveRecord::Base
-    self.table_name = 'merge_request_diffs'
-
-    include ::EachBatch
-
-    default_scope { where('st_commits IS NOT NULL OR st_diffs IS NOT NULL') }
-  end
-
-  # By this point, we assume ScheduleMergeRequestDiffMigrations - the first
-  # version of this - has already run. On GitLab.com, we have ~220k un-migrated
-  # rows, but these rows will, in general, take a long time.
-  #
-  # With a gap of 10 minutes per batch, and 500 rows per batch, these migrations
-  # are scheduled over 220_000 / 500 / 6 ~= 74 hours, which is a little over
-  # three days.
-  def up
-    queue_background_migration_jobs_by_range_at_intervals(MergeRequestDiff, MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE)
-  end
-
-  def down
-  end
-end

db/post_migrate/20171128214150_schedule_populate_merge_request_metrics_with_events_data.rb

-# frozen_string_literal: true
-
-class SchedulePopulateMergeRequestMetricsWithEventsData < ActiveRecord::Migration[4.2]
-  DOWNTIME = false
-  BATCH_SIZE = 10_000
-  MIGRATION = 'PopulateMergeRequestMetricsWithEventsData'
-
-  disable_ddl_transaction!
-
-  class MergeRequest < ActiveRecord::Base
-    self.table_name = 'merge_requests'
-
-    include ::EachBatch
-  end
-
-  def up
-    say 'Scheduling `PopulateMergeRequestMetricsWithEventsData` jobs'
-    # It will update around 4_000_000 records in batches of 10_000 merge
-    # requests (running between 10 minutes) and should take around 66 hours to complete.
-    # Apparently, production PostgreSQL is able to vacuum 10k-20k dead_tuples by
-    # minute, and at maximum, each of these jobs should UPDATE 20k records.
-    #
-    # More information about the updates in `PopulateMergeRequestMetricsWithEventsData` class.
-    #
-    MergeRequest.all.each_batch(of: BATCH_SIZE) do |relation, index|
-      range = relation.pluck('MIN(id)', 'MAX(id)').first
-
-      BackgroundMigrationWorker.perform_in(index * 10.minutes, MIGRATION, range)
-    end
-  end
-
-  def down
-    execute "update merge_request_metrics set latest_closed_at = null"
-    execute "update merge_request_metrics set latest_closed_by_id = null"
-    execute "update merge_request_metrics set merged_by_id = null"
-  end
-end

db/post_migrate/20171207150343_remove_soft_removed_objects.rb

-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class RemoveSoftRemovedObjects < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  module SoftRemoved
-    extend ActiveSupport::Concern
-
-    included do
-      scope :soft_removed, -> { where('deleted_at IS NOT NULL') }
-    end
-  end
-
-  class User < ActiveRecord::Base
-    self.table_name = 'users'
-
-    include EachBatch
-  end
-
-  class Issue < ActiveRecord::Base
-    self.table_name = 'issues'
-
-    include EachBatch
-    include SoftRemoved
-  end
-
-  class MergeRequest < ActiveRecord::Base
-    self.table_name = 'merge_requests'
-
-    include EachBatch
-    include SoftRemoved
-  end
-
-  class Namespace < ActiveRecord::Base
-    self.table_name = 'namespaces'
-
-    include EachBatch
-    include SoftRemoved
-
-    scope :soft_removed_personal, -> { soft_removed.where(type: nil) }
-    scope :soft_removed_group, -> { soft_removed.where(type: 'Group') }
-  end
-
-  class Route < ActiveRecord::Base
-    self.table_name = 'routes'
-
-    include EachBatch
-    include SoftRemoved
-  end
-
-  class Project < ActiveRecord::Base
-    self.table_name = 'projects'
-
-    include EachBatch
-    include SoftRemoved
-  end
-
-  class CiPipelineSchedule < ActiveRecord::Base
-    self.table_name = 'ci_pipeline_schedules'
-
-    include EachBatch
-    include SoftRemoved
-  end
-
-  class CiTrigger < ActiveRecord::Base
-    self.table_name = 'ci_triggers'
-
-    include EachBatch
-    include SoftRemoved
-  end
-
-  MODELS = [Issue, MergeRequest, CiPipelineSchedule, CiTrigger].freeze
-
-  def up
-    disable_statement_timeout do
-      remove_personal_routes
-      remove_personal_namespaces
-      remove_group_namespaces
-      remove_simple_soft_removed_rows
-    end
-  end
-
-  def down
-    # The data removed by this migration can't be restored in an automated way.
-  end
-
-  def remove_simple_soft_removed_rows
-    create_temporary_indexes
-
-    MODELS.each do |model|
-      say_with_time("Removing soft removed rows from #{model.table_name}") do
-        model.soft_removed.each_batch do |batch, index|
-          batch.delete_all
-        end
-      end
-    end
-  ensure
-    remove_temporary_indexes
-  end
-
-  def create_temporary_indexes
-    MODELS.each do |model|
-      index_name = temporary_index_name_for(model)
-
-      # Without this index the removal process can take a very long time. For
-      # example, getting the next ID of a batch for the `issues` table in
-      # staging would take between 15 and 20 seconds.
-      next if temporary_index_exists?(model)
-
-      say_with_time("Creating temporary index #{index_name}") do
-        add_concurrent_index(
-          model.table_name,
-          [:deleted_at, :id],
-          name: index_name,
-          where: 'deleted_at IS NOT NULL'
-        )
-      end
-    end
-  end
-
-  def remove_temporary_indexes
-    MODELS.each do |model|
-      index_name = temporary_index_name_for(model)
-
-      next unless temporary_index_exists?(model)
-
-      say_with_time("Removing temporary index #{index_name}") do
-        remove_concurrent_index_by_name(model.table_name, index_name)
-      end
-    end
-  end
-
-  def temporary_index_name_for(model)
-    "index_on_#{model.table_name}_tmp"
-  end
-
-  def temporary_index_exists?(model)
-    index_name = temporary_index_name_for(model)
-
-    index_exists?(model.table_name, [:deleted_at, :id], name: index_name)
-  end
-
-  def remove_personal_namespaces
-    # Some personal namespaces are left behind in case of GitLab.com. In these
-    # cases the associated data such as the projects and users has already been
-    # removed.
-    Namespace.soft_removed_personal.each_batch do |batch|
-      batch.delete_all
-    end
-  end
-
-  def remove_group_namespaces
-    admin_id = id_for_admin_user
-
-    unless admin_id
-      say 'Not scheduling soft removed groups for removal as no admin user ' \
-        'could be found. You will need to remove any such groups manually.'
-
-      return
-    end
-
-    # Left over groups can't be easily removed because we may also need to
-    # remove memberships, repositories, and other associated data. As a result
-    # we'll just schedule a Sidekiq job to remove these.
-    #
-    # As of January 5th, 2018 there are 36 groups that will be removed using
-    # this code.
-    Namespace.select(:id).soft_removed_group.each_batch(of: 10) do |batch, index|
-      batch.each do |ns|
-        schedule_group_removal(index * 5.minutes, ns.id, admin_id)
-      end
-    end
-  end
-
-  def schedule_group_removal(delay, group_id, user_id)
-    if migrate_inline?
-      GroupDestroyWorker.new.perform(group_id, user_id)
-    else
-      GroupDestroyWorker.perform_in(delay, group_id, user_id)
-    end
-  end
-
-  def remove_personal_routes
-    namespaces = Namespace.select(1)
-      .soft_removed
-      .where('namespaces.type IS NULL')
-      .where('routes.source_type = ?', 'Namespace')
-      .where('routes.source_id = namespaces.id')
-
-    Route.where('EXISTS (?)', namespaces).each_batch do |batch|
-      batch.delete_all
-    end
-  end
-
-  def id_for_admin_user
-    User.where(admin: true).limit(1).pluck(:id).first
-  end
-
-  def migrate_inline?
-    Rails.env.test? || Rails.env.development?
-  end
-end

db/post_migrate/20180502134117_migrate_import_attributes_data_from_projects_to_project_mirror_data.rb

-class MigrateImportAttributesDataFromProjectsToProjectMirrorData < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  UP_MIGRATION = 'PopulateImportState'.freeze
-  DOWN_MIGRATION = 'RollbackImportStateData'.freeze
-
-  BATCH_SIZE = 1000
-  DELAY_INTERVAL = 5.minutes
-
-  disable_ddl_transaction!
-
-  class Project < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'projects'
-  end
-
-  class ProjectImportState < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'project_mirror_data'
-  end
-
-  def up
-    projects = Project.where.not(import_status: :none)
-
-    queue_background_migration_jobs_by_range_at_intervals(projects, UP_MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE)
-  end
-
-  def down
-    import_state = ProjectImportState.where.not(status: :none)
-
-    queue_background_migration_jobs_by_range_at_intervals(import_state, DOWN_MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE)
-  end
-end

db/post_migrate/20180521162137_migrate_remaining_mr_metrics_populating_background_migration.rb

-class MigrateRemainingMrMetricsPopulatingBackgroundMigration < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  BATCH_SIZE = 5_000
-  MIGRATION = 'PopulateMergeRequestMetricsWithEventsData'
-  DELAY_INTERVAL = 10.minutes
-
-  disable_ddl_transaction!
-
-  class MergeRequest < ActiveRecord::Base
-    self.table_name = 'merge_requests'
-
-    include ::EachBatch
-  end
-
-  def up
-    # Perform any ongoing background migration that might still be running. This
-    # avoids scheduling way too many of the same jobs on self-hosted instances
-    # if they're updating GitLab across multiple versions. The "Take one"
-    # migration was executed on 10.4 on
-    # SchedulePopulateMergeRequestMetricsWithEventsData.
-    Gitlab::BackgroundMigration.steal(MIGRATION)
-
-    metrics_not_exists_clause = <<~SQL
-      NOT EXISTS (SELECT 1 FROM merge_request_metrics
-                  WHERE merge_request_metrics.merge_request_id = merge_requests.id)
-    SQL
-
-    relation = MergeRequest.where(metrics_not_exists_clause)
-
-    # We currently have ~400_000 MR records without metrics on GitLab.com.
-    # This means it'll schedule ~80 jobs (5000 MRs each) with a 10 minutes gap,
-    # so this should take ~14 hours for all background migrations to complete.
-    #
-    queue_background_migration_jobs_by_range_at_intervals(relation,
-                                                          MIGRATION,
-                                                          DELAY_INTERVAL,
-                                                          batch_size: BATCH_SIZE)
-  end
-
-  def down
-  end
-end

db/post_migrate/20180619121030_enqueue_delete_diff_files_workers.rb

-class EnqueueDeleteDiffFilesWorkers < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  SCHEDULER = 'ScheduleDiffFilesDeletion'.freeze
-  TMP_INDEX = 'tmp_partial_diff_id_with_files_index'.freeze
-
-  disable_ddl_transaction!
-
-  def up
-    unless index_exists_by_name?(:merge_request_diffs, TMP_INDEX)
-      add_concurrent_index(:merge_request_diffs, :id, where: "(state NOT IN ('without_files', 'empty'))", name: TMP_INDEX)
-    end
-
-    BackgroundMigrationWorker.perform_async(SCHEDULER)
-
-    # We don't remove the index since it's going to be used on DeleteDiffFiles
-    # worker. We should remove it in an upcoming release.
-  end
-
-  def down
-    if index_exists_by_name?(:merge_request_diffs, TMP_INDEX)
-      remove_concurrent_index_by_name(:merge_request_diffs, TMP_INDEX)
-    end
-  end
-end

db/post_migrate/20180723130817_delete_inconsistent_internal_id_records.rb

-# frozen_string_literal: true
-class DeleteInconsistentInternalIdRecords < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  # This migration cleans up any inconsistent records in internal_ids.
-  #
-  # That is, it deletes records that track a `last_value` that is
-  # smaller than the maximum internal id (usually `iid`) found in
-  # the corresponding model records.
-
-  def up
-    disable_statement_timeout do
-      delete_internal_id_records('issues', 'project_id')
-      delete_internal_id_records('merge_requests', 'project_id', 'target_project_id')
-      delete_internal_id_records('deployments', 'project_id')
-      delete_internal_id_records('milestones', 'project_id')
-      delete_internal_id_records('milestones', 'namespace_id', 'group_id')
-      delete_internal_id_records('ci_pipelines', 'project_id')
-    end
-  end
-
-  class InternalId < ActiveRecord::Base
-    self.table_name = 'internal_ids'
-    enum usage: { issues: 0, merge_requests: 1, deployments: 2, milestones: 3, epics: 4, ci_pipelines: 5 }
-  end
-
-  private
-
-  def delete_internal_id_records(base_table, scope_column_name, base_scope_column_name = scope_column_name)
-    sql = <<~SQL
-      SELECT id FROM ( -- workaround for MySQL
-       SELECT internal_ids.id FROM (
-         SELECT #{base_scope_column_name} AS #{scope_column_name}, max(iid) as maximum_iid from #{base_table} GROUP BY #{scope_column_name}
-       ) maxima JOIN internal_ids USING (#{scope_column_name})
-       WHERE internal_ids.usage=#{InternalId.usages.fetch(base_table)} AND maxima.maximum_iid > internal_ids.last_value
-      ) internal_ids
-    SQL
-
-    InternalId.where("id IN (#{sql})").tap do |ids| # rubocop:disable GitlabSecurity/SqlInjection
-      say "Deleting internal_id records for #{base_table}: #{ids.pluck(:project_id, :last_value)}" unless ids.empty?
-    end.delete_all
-  end
-end

db/post_migrate/20180906051323_remove_orphaned_label_links.rb

-# frozen_string_literal: true
-
-class RemoveOrphanedLabelLinks < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  class LabelLinks < ActiveRecord::Base
-    self.table_name = 'label_links'
-    include EachBatch
-
-    def self.orphaned
-      where('NOT EXISTS ( SELECT 1 FROM labels WHERE labels.id = label_links.label_id )')
-    end
-  end
-
-  def up
-    # Some of these queries can take up to 10 seconds to run on GitLab.com,
-    # which is pretty close to our 15 second statement timeout. To ensure a
-    # smooth deployment procedure we disable the statement timeouts for this
-    # migration, just in case.
-    disable_statement_timeout do
-      # On GitLab.com there are over 2,000,000 orphaned label links. On
-      # staging, removing 100,000 rows generated a max replication lag of 6.7
-      # MB. In total, removing all these rows will only generate about 136 MB
-      # of data, so it should be safe to do this.
-      LabelLinks.orphaned.each_batch(of: 100_000) do |batch|
-        batch.delete_all
-      end
-    end
-
-    add_concurrent_foreign_key(:label_links, :labels, column: :label_id, on_delete: :cascade)
-  end
-
-  def down
-    # There is no way to restore orphaned label links.
-    if foreign_key_exists?(:label_links, column: :label_id)
-      remove_foreign_key(:label_links, column: :label_id)
-    end
-  end
-end

db/post_migrate/20180913051323_consume_remaining_diff_files_deletion_jobs.rb

-# frozen_string_literal: true
-
-class ConsumeRemainingDiffFilesDeletionJobs < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  MIGRATION = 'ScheduleDiffFilesDeletion'.freeze
-  TMP_INDEX = 'tmp_partial_diff_id_with_files_index'.freeze
-
-  def up
-    # Perform any ongoing background migration that might still be scheduled.
-    Gitlab::BackgroundMigration.steal(MIGRATION)
-
-    remove_concurrent_index_by_name(:merge_request_diffs, TMP_INDEX)
-  end
-
-  def down
-    add_concurrent_index(:merge_request_diffs, :id, where: "(state NOT IN ('without_files', 'empty'))", name: TMP_INDEX)
-  end
-end

db/post_migrate/20181014121030_enqueue_redact_links.rb

-# frozen_string_literal: true
-
-class EnqueueRedactLinks < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  BATCH_SIZE = 1000
-  DELAY_INTERVAL = 5.minutes.to_i
-  MIGRATION = 'RedactLinks'
-
-  disable_ddl_transaction!
-
-  class Note < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'notes'
-    self.inheritance_column = :_type_disabled
-  end
-
-  class Issue < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'issues'
-    self.inheritance_column = :_type_disabled
-  end
-
-  class MergeRequest < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'merge_requests'
-    self.inheritance_column = :_type_disabled
-  end
-
-  class Snippet < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'snippets'
-    self.inheritance_column = :_type_disabled
-  end
-
-  def up
-    disable_statement_timeout do
-      schedule_migration(Note, 'note')
-      schedule_migration(Issue, 'description')
-      schedule_migration(MergeRequest, 'description')
-      schedule_migration(Snippet, 'description')
-    end
-  end
-
-  def down
-    # nothing to do
-  end
-
-  private
-
-  def schedule_migration(model, field)
-    link_pattern = "%/sent_notifications/" + ("_" * 32) + "/unsubscribe%"
-
-    model.where("#{field} like ?", link_pattern).each_batch(of: BATCH_SIZE) do |batch, index|
-      start_id, stop_id = batch.pluck('MIN(id)', 'MAX(id)').first
-
-      BackgroundMigrationWorker.perform_in(index * DELAY_INTERVAL, MIGRATION, [model.name.demodulize, field, start_id, stop_id])
-    end
-  end
-end

db/post_migrate/20181204154019_populate_mr_metrics_with_events_data.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class PopulateMrMetricsWithEventsData < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  BATCH_SIZE = 10_000
-  MIGRATION = 'PopulateMergeRequestMetricsWithEventsDataImproved'
-  PREVIOUS_MIGRATION = 'PopulateMergeRequestMetricsWithEventsData'
-
-  disable_ddl_transaction!
-
-  def up
-    # Perform any ongoing background migration that might still be running from
-    # previous try (see https://gitlab.com/gitlab-org/gitlab-ce/issues/47676).
-    Gitlab::BackgroundMigration.steal(PREVIOUS_MIGRATION)
-
-    say 'Scheduling `PopulateMergeRequestMetricsWithEventsData` jobs'
-    # It will update around 4_000_000 records in batches of 10_000 merge
-    # requests (running between 5 minutes) and should take around 53 hours to complete.
-    # Apparently, production PostgreSQL is able to vacuum 10k-20k dead_tuples
-    # per minute. So this should give us enough space.
-    #
-    # More information about the updates in `PopulateMergeRequestMetricsWithEventsDataImproved` class.
-    #
-    MergeRequest.all.each_batch(of: BATCH_SIZE) do |relation, index|
-      range = relation.pluck('MIN(id)', 'MAX(id)').first
-
-      BackgroundMigrationWorker.perform_in(index * 8.minutes, MIGRATION, range)
-    end
-  end
-
-  def down
-  end
-end

db/post_migrate/20190402224749_schedule_merge_request_assignees_migration_progress_check.rb

+# frozen_string_literal: true
+
+class ScheduleMergeRequestAssigneesMigrationProgressCheck < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  MIGRATION = 'MergeRequestAssigneesMigrationProgressCheck'.freeze
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    BackgroundMigrationWorker.perform_async(MIGRATION)
+  end
+
+  def down
+  end
+end

db/post_migrate/20190404143330_add_unique_constraint_to_approvals_user_id_and_merge_request_id.rb

+# frozen_string_literal: true
+
+class AddUniqueConstraintToApprovalsUserIdAndMergeRequestId < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    remove_duplicates
+    add_concurrent_index :approvals, [:user_id, :merge_request_id], unique: true
+  end
+
+  def down
+    remove_concurrent_index :approvals, [:user_id, :merge_request_id]
+  end
+
+  private
+
+  def remove_duplicates
+    add_concurrent_index :approvals, [:user_id, :merge_request_id, :id]
+
+    if Gitlab::Database.mysql?
+      execute <<-SQL
+        DELETE FROM a
+        USING approvals AS a
+        INNER JOIN (
+          SELECT user_id, merge_request_id, MIN(id) as min_id
+          FROM approvals
+          GROUP BY user_id, merge_request_id
+          HAVING COUNT(id) > 1
+        ) as approvals_with_duplicates
+        ON approvals_with_duplicates.user_id = a.user_id
+        AND approvals_with_duplicates.merge_request_id = a.merge_request_id
+        WHERE approvals_with_duplicates.min_id <> a.id;
+      SQL
+    else
+      execute <<-SQL
+        DELETE FROM approvals
+        USING (
+          SELECT user_id, merge_request_id, MIN(id) as min_id
+          FROM approvals
+          GROUP BY user_id, merge_request_id
+          HAVING COUNT(id) > 1
+        ) as approvals_with_duplicates
+        WHERE approvals_with_duplicates.user_id = approvals.user_id
+        AND approvals_with_duplicates.merge_request_id = approvals.merge_request_id
+        AND approvals_with_duplicates.min_id <> approvals.id;
+      SQL
+    end
+
+    remove_concurrent_index :approvals, [:user_id, :merge_request_id, :id]
+  end
+end

db/post_migrate/20190404231137_remove_alternate_url_from_geo_nodes.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+# We are reverting the feature that created this column. This is for anyone who
+# migrated while the feature still existed in master.
+class RemoveAlternateUrlFromGeoNodes < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def up
+    remove_column(:geo_nodes, :alternate_url) if column_exists?(:geo_nodes, :alternate_url)
+  end
+
+  def down
+    add_column :geo_nodes, :alternate_url, :string
+  end
+end

db/post_migrate/20190418132125_populate_project_statistics_packages_size.rb

+# frozen_string_literal: true
+
+class PopulateProjectStatisticsPackagesSize < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  class ProjectStatistics < ActiveRecord::Base
+    self.table_name = 'project_statistics'
+  end
+
+  def up
+    stats_ids = ProjectStatistics.joins(
+      <<~SQL.strip_heredoc
+        INNER JOIN projects ON projects.id = project_statistics.project_id
+        INNER JOIN packages_packages ON packages_packages.project_id = projects.id
+        INNER JOIN packages_package_files ON packages_package_files.package_id = packages_packages.id
+      SQL
+    ).distinct.select(:id)
+
+    packages_size = Arel.sql(
+      '(SELECT SUM(size) FROM packages_package_files ' \
+      'JOIN packages_packages ON packages_packages.id = packages_package_files.package_id ' \
+      'WHERE packages_packages.project_id = project_statistics.project_id)'
+    )
+    update_column_in_batches(:project_statistics, :packages_size, packages_size) do |table, query|
+      query.where(table[:id].in(stats_ids))
+    end
+
+    storage_size = Arel.sql('(repository_size + lfs_objects_size + build_artifacts_size + COALESCE(packages_size, 0))')
+    update_column_in_batches(:project_statistics, :storage_size, storage_size) do |table, query|
+      query.where(table[:id].in(stats_ids))
+    end
+  end
+
+  def down
+    storage_size = Arel.sql('(repository_size + lfs_objects_size + build_artifacts_size)')
+    update_column_in_batches(:project_statistics, :storage_size, storage_size) do |table, query|
+      query.where(table[:packages_size].gt(0))
+    end
+
+    update_column_in_batches(:project_statistics, :packages_size, nil)
+  end
+end

db/post_migrate/20190511144331_remove_users_support_type.rb

+# frozen_string_literal: true
+
+class RemoveUsersSupportType < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  INDEX_STATE_INTERNAL_ATTRS = 'index_users_on_state_and_internal_attrs'
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index :users, :state, name: INDEX_STATE_INTERNAL_ATTRS
+    remove_concurrent_index :users, :support_bot
+
+    remove_column :users, :support_bot
+  end
+
+  def down
+    add_column :users, :support_bot, :boolean
+
+    add_concurrent_index :users, :support_bot
+    add_concurrent_index :users, :state,
+      name: INDEX_STATE_INTERNAL_ATTRS,
+      where: 'ghost <> true AND support_bot <> true'
+  end
+end

db/post_migrate/20180916014356_populate_external_pipeline_source.rb → db/post_migrate/20190520201748_populate_rule_type_on_approval_merge_request_rules.rb

@@ -3,31 +3,32 @@
 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
 
-class PopulateExternalPipelineSource < ActiveRecord::Migration[4.2]
+class PopulateRuleTypeOnApprovalMergeRequestRules < ActiveRecord::Migration[5.1]
   include Gitlab::Database::MigrationHelpers
 
   # Set this constant to true if this migration requires downtime.
   DOWNTIME = false
-  MIGRATION = 'PopulateExternalPipelineSource'.freeze
-  BATCH_SIZE = 500
 
   disable_ddl_transaction!
 
-  class Pipeline < ActiveRecord::Base
+  class ApprovalMergeRequestRule < ActiveRecord::Base
     include EachBatch
-    self.table_name = 'ci_pipelines'
+
+    enum rule_types: {
+      regular: 1,
+      code_owner: 2
+    }
   end
 
   def up
-    Pipeline.where(source: nil).tap do |relation|
-      queue_background_migration_jobs_by_range_at_intervals(relation,
-                                                            MIGRATION,
-                                                            5.minutes,
-                                                            batch_size: BATCH_SIZE)
+    # On Gitlab.com, this should update about 17k rows. Since our updates are
+    # small and we are populating prior to indexing, the overhead should be small
+    ApprovalMergeRequestRule.where(code_owner: true).each_batch do |batch|
+      batch.update_all(rule_type: ApprovalMergeRequestRule.rule_types[:code_owner])
     end
   end
 
   def down
-    # noop
+    # code_owner is already kept in sync with `rule_type`, so no changes are needed
   end
 end

doc/development/import_export.md

@@ -147,7 +147,6 @@ The `ModelConfigurationSpec` checks and confirms the addition of new models:
   If you think this model should be included in the export, please add it to `#{Gitlab::ImportExport.config_file}`.
 
   Definitely add it to `#{File.expand_path(ce_models_yml)}`
-  #{"or `#{File.expand_path(ee_models_yml)}` if the model/associations are EE-specific\n" if ee_models_hash.any?}
   to signal that you've handled this error and to prevent it from showing up in the future.
 MSG
 ```
@@ -253,7 +252,7 @@ Model relationships to be included in the project import/export:
 ```yaml
 project_tree:
   - labels:
-      :priorities
+    - :priorities
   - milestones:
     - events:
       - :push_event_payload

lib/gitlab/background_migration/create_gpg_key_subkeys_from_gpg_keys.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-class Gitlab::BackgroundMigration::CreateGpgKeySubkeysFromGpgKeys
-  class GpgKey < ActiveRecord::Base
-    self.table_name = 'gpg_keys'
-
-    include EachBatch
-    include ShaAttribute
-
-    sha_attribute :primary_keyid
-    sha_attribute :fingerprint
-
-    has_many :subkeys, class_name: 'GpgKeySubkey'
-  end
-
-  class GpgKeySubkey < ActiveRecord::Base
-    self.table_name = 'gpg_key_subkeys'
-
-    include ShaAttribute
-
-    sha_attribute :keyid
-    sha_attribute :fingerprint
-  end
-
-  def perform(gpg_key_id)
-    gpg_key = GpgKey.find_by(id: gpg_key_id)
-
-    return if gpg_key.nil?
-    return if gpg_key.subkeys.any?
-
-    create_subkeys(gpg_key)
-    update_signatures(gpg_key)
-  end
-
-  private
-
-  def create_subkeys(gpg_key)
-    gpg_subkeys = Gitlab::Gpg.subkeys_from_key(gpg_key.key)
-
-    gpg_subkeys[gpg_key.primary_keyid.upcase]&.each do |subkey_data|
-      gpg_key.subkeys.build(keyid: subkey_data[:keyid], fingerprint: subkey_data[:fingerprint])
-    end
-
-    # Improve latency by doing all INSERTs in a single call
-    GpgKey.transaction do
-      gpg_key.save!
-    end
-  end
-
-  def update_signatures(gpg_key)
-    return unless gpg_key.subkeys.exists?
-
-    InvalidGpgSignatureUpdateWorker.perform_async(gpg_key.id)
-  end
-end

lib/gitlab/background_migration/delete_diff_files.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class DeleteDiffFiles
-      class MergeRequestDiff < ActiveRecord::Base
-        self.table_name = 'merge_request_diffs'
-
-        belongs_to :merge_request
-        has_many :merge_request_diff_files
-      end
-
-      class MergeRequestDiffFile < ActiveRecord::Base
-        self.table_name = 'merge_request_diff_files'
-      end
-
-      DEAD_TUPLES_THRESHOLD = 50_000
-      VACUUM_WAIT_TIME = 5.minutes
-
-      def perform(ids)
-        @ids = ids
-
-        # We should reschedule until deadtuples get in a desirable
-        # state (e.g. < 50_000). That may take more than one reschedule.
-        #
-        if should_wait_deadtuple_vacuum?
-          reschedule
-          return
-        end
-
-        prune_diff_files
-      end
-
-      def should_wait_deadtuple_vacuum?
-        return false unless Gitlab::Database.postgresql?
-
-        diff_files_dead_tuples_count >= DEAD_TUPLES_THRESHOLD
-      end
-
-      private
-
-      def reschedule
-        BackgroundMigrationWorker.perform_in(VACUUM_WAIT_TIME, self.class.name.demodulize, [@ids])
-      end
-
-      def diffs_collection
-        MergeRequestDiff.where(id: @ids)
-      end
-
-      def diff_files_dead_tuples_count
-        dead_tuple =
-          execute_statement("SELECT n_dead_tup FROM pg_stat_all_tables "\
-                            "WHERE relname = 'merge_request_diff_files'")[0]
-
-        dead_tuple&.fetch('n_dead_tup', 0).to_i
-      end
-
-      def prune_diff_files
-        removed = 0
-        updated = 0
-
-        MergeRequestDiff.transaction do
-          updated = diffs_collection.update_all(state: 'without_files')
-          removed = MergeRequestDiffFile.where(merge_request_diff_id: @ids).delete_all
-        end
-
-        log_info("Removed #{removed} merge_request_diff_files rows, "\
-                 "updated #{updated} merge_request_diffs rows")
-      end
-
-      def execute_statement(sql)
-        ActiveRecord::Base.connection.execute(sql)
-      end
-
-      def log_info(message)
-        Rails.logger.info("BackgroundMigration::DeleteDiffFiles - #{message}")
-      end
-    end
-  end
-end

lib/gitlab/background_migration/deserialize_merge_request_diffs_and_commits.rb

-# frozen_string_literal: true
-# rubocop:disable Metrics/MethodLength
-# rubocop:disable Metrics/AbcSize
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class DeserializeMergeRequestDiffsAndCommits
-      attr_reader :diff_ids, :commit_rows, :file_rows
-
-      class Error < StandardError
-        def backtrace
-          cause.backtrace
-        end
-      end
-
-      class MergeRequestDiff < ActiveRecord::Base
-        self.table_name = 'merge_request_diffs'
-      end
-
-      BUFFER_ROWS = 1000
-      DIFF_FILE_BUFFER_ROWS = 100
-
-      def perform(start_id, stop_id)
-        merge_request_diffs = MergeRequestDiff
-                               .select(:id, :st_commits, :st_diffs)
-                               .where('st_commits IS NOT NULL OR st_diffs IS NOT NULL')
-                               .where(id: start_id..stop_id)
-
-        reset_buffers!
-
-        merge_request_diffs.each do |merge_request_diff|
-          commits, files = single_diff_rows(merge_request_diff)
-
-          diff_ids << merge_request_diff.id
-          commit_rows.concat(commits)
-          file_rows.concat(files)
-
-          if diff_ids.length > BUFFER_ROWS ||
-              commit_rows.length > BUFFER_ROWS ||
-              file_rows.length > DIFF_FILE_BUFFER_ROWS
-
-            flush_buffers!
-          end
-        end
-
-        flush_buffers!
-      rescue => e
-        Rails.logger.info("#{self.class.name}: failed for IDs #{merge_request_diffs.map(&:id)} with #{e.class.name}")
-
-        raise Error.new(e.inspect)
-      end
-
-      private
-
-      def reset_buffers!
-        @diff_ids = []
-        @commit_rows = []
-        @file_rows = []
-      end
-
-      def flush_buffers!
-        if diff_ids.any?
-          commit_rows.each_slice(BUFFER_ROWS).each do |commit_rows_slice|
-            bulk_insert('merge_request_diff_commits', commit_rows_slice)
-          end
-
-          file_rows.each_slice(DIFF_FILE_BUFFER_ROWS).each do |file_rows_slice|
-            bulk_insert('merge_request_diff_files', file_rows_slice)
-          end
-
-          MergeRequestDiff.where(id: diff_ids).update_all(st_commits: nil, st_diffs: nil)
-        end
-
-        reset_buffers!
-      end
-
-      def bulk_insert(table, rows)
-        Gitlab::Database.bulk_insert(table, rows)
-      rescue ActiveRecord::RecordNotUnique
-        ids = rows.map { |row| row[:merge_request_diff_id] }.uniq.sort
-
-        Rails.logger.info("#{self.class.name}: rows inserted twice for IDs #{ids}")
-      end
-
-      def single_diff_rows(merge_request_diff)
-        sha_attribute = Gitlab::Database::ShaAttribute.new
-        commits = YAML.load(merge_request_diff.st_commits) rescue []
-        commits ||= []
-
-        commit_rows = commits.map.with_index do |commit, index|
-          commit_hash = commit.to_hash.with_indifferent_access.except(:parent_ids)
-          sha = commit_hash.delete(:id)
-
-          commit_hash.merge(
-            merge_request_diff_id: merge_request_diff.id,
-            relative_order: index,
-            sha: sha_attribute.serialize(sha)
-          )
-        end
-
-        diffs = YAML.load(merge_request_diff.st_diffs) rescue []
-        diffs = [] unless valid_raw_diffs?(diffs)
-
-        file_rows = diffs.map.with_index do |diff, index|
-          diff_hash = diff.to_hash.with_indifferent_access.merge(
-            binary: false,
-            merge_request_diff_id: merge_request_diff.id,
-            relative_order: index
-          )
-
-          diff_hash.tap do |hash|
-            diff_text = hash[:diff]
-
-            hash[:too_large] = !!hash[:too_large]
-
-            hash[:a_mode] ||= guess_mode(hash[:new_file], hash[:diff])
-            hash[:b_mode] ||= guess_mode(hash[:deleted_file], hash[:diff])
-
-            # Compatibility with old diffs created with Psych.
-            if diff_text.encoding == Encoding::BINARY && !diff_text.ascii_only?
-              hash[:binary] = true
-              hash[:diff] = [diff_text].pack('m0')
-            end
-          end
-        end
-
-        [commit_rows, file_rows]
-      end
-
-      # This doesn't have to be 100% accurate, because it's only used for
-      # display - it won't change file modes in the repository. Submodules are
-      # created as 600, regular files as 644.
-      def guess_mode(file_missing, diff)
-        return '0' if file_missing
-
-        diff.include?('Subproject commit') ? '160000' : '100644'
-      end
-
-      # Unlike MergeRequestDiff#valid_raw_diff?, don't count Rugged objects as
-      # valid, because we don't render them usefully anyway.
-      def valid_raw_diffs?(diffs)
-        return false unless diffs.respond_to?(:each)
-
-        diffs.all? { |diff| diff.is_a?(Hash) }
-      end
-    end
-  end
-end

lib/gitlab/background_migration/merge_request_assignees_migration_progress_check.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module BackgroundMigration
+    # rubocop: disable Style/Documentation
+    class MergeRequestAssigneesMigrationProgressCheck
+      include Gitlab::Utils::StrongMemoize
+
+      RESCHEDULE_DELAY = 3.hours
+      WORKER = 'PopulateMergeRequestAssigneesTable'.freeze
+      DeadJobsError = Class.new(StandardError)
+
+      def perform
+        raise DeadJobsError, "Only dead background jobs in the queue for #{WORKER}" if !ongoing? && dead_jobs?
+
+        if ongoing?
+          BackgroundMigrationWorker.perform_in(RESCHEDULE_DELAY, self.class.name)
+        else
+          Feature.enable(:multiple_merge_request_assignees)
+        end
+      end
+
+      private
+
+      def dead_jobs?
+        strong_memoize(:dead_jobs) do
+          migration_klass.dead_jobs?(WORKER)
+        end
+      end
+
+      def ongoing?
+        strong_memoize(:ongoing) do
+          migration_klass.exists?(WORKER) || migration_klass.retrying_jobs?(WORKER)
+        end
+      end
+
+      def migration_klass
+        Gitlab::BackgroundMigration
+      end
+    end
+    # rubocop: enable Style/Documentation
+  end
+end

lib/gitlab/background_migration/populate_external_pipeline_source.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class PopulateExternalPipelineSource
-      module Migratable
-        class Pipeline < ActiveRecord::Base
-          self.table_name = 'ci_pipelines'
-
-          def self.sources
-            {
-              unknown: nil,
-              push: 1,
-              web: 2,
-              trigger: 3,
-              schedule: 4,
-              api: 5,
-              external: 6
-            }
-          end
-        end
-
-        class CommitStatus < ActiveRecord::Base
-          self.table_name = 'ci_builds'
-          self.inheritance_column = :_type_disabled
-
-          scope :has_pipeline, -> { where('ci_builds.commit_id=ci_pipelines.id') }
-          scope :of_type, -> (type) { where('type=?', type) }
-        end
-      end
-
-      def perform(start_id, stop_id)
-        external_pipelines(start_id, stop_id)
-          .update_all(source: Migratable::Pipeline.sources[:external])
-      end
-
-      private
-
-      def external_pipelines(start_id, stop_id)
-        Migratable::Pipeline.where(id: (start_id..stop_id))
-          .where(
-            'EXISTS (?) AND NOT EXISTS (?)',
-            Migratable::CommitStatus.of_type('GenericCommitStatus').has_pipeline.select(1),
-            Migratable::CommitStatus.of_type('Ci::Build').has_pipeline.select(1)
-          )
-      end
-    end
-  end
-end

lib/gitlab/background_migration/populate_import_state.rb

-# frozen_string_literal: true
-
-module Gitlab
-  module BackgroundMigration
-    # This background migration creates all the records on the
-    # import state table for projects that are considered imports or forks
-    class PopulateImportState
-      def perform(start_id, end_id)
-        move_attributes_data_to_import_state(start_id, end_id)
-      rescue ActiveRecord::RecordNotUnique
-        retry
-      end
-
-      def move_attributes_data_to_import_state(start_id, end_id)
-        Rails.logger.info("#{self.class.name} - Moving import attributes data to project mirror data table: #{start_id} - #{end_id}")
-
-        ActiveRecord::Base.connection.execute <<~SQL
-          INSERT INTO project_mirror_data (project_id, status, jid, last_error)
-          SELECT id, import_status, import_jid, import_error
-          FROM projects
-          WHERE projects.import_status != 'none'
-          AND projects.id BETWEEN #{start_id} AND #{end_id}
-          AND NOT EXISTS (
-            SELECT id
-            FROM project_mirror_data
-            WHERE project_id = projects.id
-          )
-        SQL
-
-        ActiveRecord::Base.connection.execute <<~SQL
-          UPDATE projects
-          SET import_status = 'none'
-          WHERE import_status != 'none'
-          AND id BETWEEN #{start_id} AND #{end_id}
-        SQL
-      end
-    end
-  end
-end

lib/gitlab/background_migration/populate_merge_request_metrics_with_events_data.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class PopulateMergeRequestMetricsWithEventsData
-      def perform(min_merge_request_id, max_merge_request_id)
-        insert_metrics_for_range(min_merge_request_id, max_merge_request_id)
-        update_metrics_with_events_data(min_merge_request_id, max_merge_request_id)
-      end
-
-      # Inserts merge_request_metrics records for merge_requests without it for
-      # a given merge request batch.
-      def insert_metrics_for_range(min, max)
-        metrics_not_exists_clause =
-          <<-SQL.strip_heredoc
-            NOT EXISTS (SELECT 1 FROM merge_request_metrics
-                        WHERE merge_request_metrics.merge_request_id = merge_requests.id)
-          SQL
-
-        MergeRequest.where(metrics_not_exists_clause).where(id: min..max).each_batch do |batch|
-          select_sql = batch.select(:id, :created_at, :updated_at).to_sql
-
-          execute("INSERT INTO merge_request_metrics (merge_request_id, created_at, updated_at) #{select_sql}")
-        end
-      end
-
-      def update_metrics_with_events_data(min, max)
-        if Gitlab::Database.postgresql?
-          # Uses WITH syntax in order to update merged and closed events with a single UPDATE.
-          # WITH is not supported by MySQL.
-          update_events_for_range(min, max)
-        else
-          update_merged_events_for_range(min, max)
-          update_closed_events_for_range(min, max)
-        end
-      end
-
-      private
-
-      # Updates merge_request_metrics latest_closed_at, latest_closed_by_id and merged_by_id
-      # based on the latest event records on events table for a given merge request batch.
-      def update_events_for_range(min, max)
-        sql = <<-SQL.strip_heredoc
-          WITH events_for_update AS (
-            SELECT DISTINCT ON (target_id, action) target_id, action, author_id, updated_at
-             FROM events
-            WHERE target_id BETWEEN #{min} AND #{max}
-              AND target_type = 'MergeRequest'
-              AND action IN (#{Event::CLOSED},#{Event::MERGED})
-            ORDER BY target_id, action, id DESC
-          )
-          UPDATE merge_request_metrics met
-            SET latest_closed_at = latest_closed.updated_at,
-                latest_closed_by_id = latest_closed.author_id,
-                merged_by_id = latest_merged.author_id
-           FROM (SELECT * FROM events_for_update WHERE action = #{Event::CLOSED}) AS latest_closed
-           FULL OUTER JOIN
-                (SELECT * FROM events_for_update WHERE action = #{Event::MERGED}) AS latest_merged
-          USING (target_id)
-          WHERE target_id = merge_request_id;
-        SQL
-
-        execute(sql)
-      end
-
-      # Updates merge_request_metrics latest_closed_at, latest_closed_by_id based on the latest closed
-      # records on events table for a given merge request batch.
-      def update_closed_events_for_range(min, max)
-        sql =
-          <<-SQL.strip_heredoc
-            UPDATE merge_request_metrics metrics,
-              (#{select_events(min, max, Event::CLOSED)}) closed_events
-            SET metrics.latest_closed_by_id = closed_events.author_id,
-                metrics.latest_closed_at = closed_events.updated_at #{where_matches_closed_events};
-          SQL
-
-        execute(sql)
-      end
-
-      # Updates merge_request_metrics merged_by_id based on the latest merged
-      # records on events table for a given merge request batch.
-      def update_merged_events_for_range(min, max)
-        sql =
-          <<-SQL.strip_heredoc
-            UPDATE merge_request_metrics metrics,
-              (#{select_events(min, max, Event::MERGED)}) merged_events
-            SET metrics.merged_by_id = merged_events.author_id #{where_matches_merged_events};
-          SQL
-
-        execute(sql)
-      end
-
-      def execute(sql)
-        @connection ||= ActiveRecord::Base.connection
-        @connection.execute(sql)
-      end
-
-      def select_events(min, max, action)
-        select_max_event_id = <<-SQL.strip_heredoc
-          SELECT max(id)
-          FROM events
-          WHERE action = #{action}
-          AND target_type = 'MergeRequest'
-          AND target_id BETWEEN #{min} AND #{max}
-          GROUP BY target_id
-        SQL
-
-        <<-SQL.strip_heredoc
-          SELECT author_id, updated_at, target_id
-          FROM events
-          WHERE id IN(#{select_max_event_id})
-        SQL
-      end
-
-      def where_matches_closed_events
-        <<-SQL.strip_heredoc
-          WHERE metrics.merge_request_id = closed_events.target_id
-          AND metrics.latest_closed_at IS NULL
-          AND metrics.latest_closed_by_id IS NULL
-        SQL
-      end
-
-      def where_matches_merged_events
-        <<-SQL.strip_heredoc
-          WHERE metrics.merge_request_id = merged_events.target_id
-          AND metrics.merged_by_id IS NULL
-        SQL
-      end
-    end
-  end
-end

lib/gitlab/background_migration/populate_merge_request_metrics_with_events_data_improved.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class PopulateMergeRequestMetricsWithEventsDataImproved
-      CLOSED_EVENT_ACTION = 3
-      MERGED_EVENT_ACTION = 7
-
-      def perform(min_merge_request_id, max_merge_request_id)
-        insert_metrics_for_range(min_merge_request_id, max_merge_request_id)
-        update_metrics_with_events_data(min_merge_request_id, max_merge_request_id)
-      end
-
-      # Inserts merge_request_metrics records for merge_requests without it for
-      # a given merge request batch.
-      def insert_metrics_for_range(min, max)
-        metrics_not_exists_clause =
-          <<-SQL.strip_heredoc
-            NOT EXISTS (SELECT 1 FROM merge_request_metrics
-                        WHERE merge_request_metrics.merge_request_id = merge_requests.id)
-          SQL
-
-        MergeRequest.where(metrics_not_exists_clause).where(id: min..max).each_batch do |batch|
-          select_sql = batch.select(:id, :created_at, :updated_at).to_sql
-
-          execute("INSERT INTO merge_request_metrics (merge_request_id, created_at, updated_at) #{select_sql}")
-        end
-      end
-
-      def update_metrics_with_events_data(min, max)
-        if Gitlab::Database.postgresql?
-          psql_update_metrics_with_events_data(min, max)
-        else
-          mysql_update_metrics_with_events_data(min, max)
-        end
-      end
-
-      def psql_update_metrics_with_events_data(min, max)
-        update_sql = <<-SQL.strip_heredoc
-          UPDATE merge_request_metrics
-          SET (latest_closed_at,
-             latest_closed_by_id) =
-          ( SELECT updated_at,
-                   author_id
-           FROM events
-           WHERE target_id = merge_request_id
-             AND target_type = 'MergeRequest'
-             AND action = #{CLOSED_EVENT_ACTION}
-           ORDER BY id DESC
-           LIMIT 1 ),
-             merged_by_id =
-          ( SELECT author_id
-           FROM events
-           WHERE target_id = merge_request_id
-             AND target_type = 'MergeRequest'
-             AND action = #{MERGED_EVENT_ACTION}
-           ORDER BY id DESC
-           LIMIT 1 )
-          WHERE merge_request_id BETWEEN #{min} AND #{max}
-        SQL
-
-        execute(update_sql)
-      end
-
-      def mysql_update_metrics_with_events_data(min, max)
-        closed_updated_at_subquery = mysql_events_select(:updated_at, CLOSED_EVENT_ACTION)
-        closed_author_id_subquery = mysql_events_select(:author_id, CLOSED_EVENT_ACTION)
-        merged_author_id_subquery = mysql_events_select(:author_id, MERGED_EVENT_ACTION)
-
-        update_sql = <<-SQL.strip_heredoc
-          UPDATE merge_request_metrics
-          SET latest_closed_at = (#{closed_updated_at_subquery}),
-              latest_closed_by_id = (#{closed_author_id_subquery}),
-              merged_by_id = (#{merged_author_id_subquery})
-          WHERE merge_request_id BETWEEN #{min} AND #{max}
-        SQL
-
-        execute(update_sql)
-      end
-
-      def mysql_events_select(column, action)
-        <<-SQL.strip_heredoc
-          SELECT #{column} FROM events
-           WHERE target_id = merge_request_id
-             AND target_type = 'MergeRequest'
-             AND action = #{action}
-           ORDER BY id DESC
-           LIMIT 1
-        SQL
-      end
-
-      def execute(sql)
-        @connection ||= ActiveRecord::Base.connection
-        @connection.execute(sql)
-      end
-    end
-  end
-end

lib/gitlab/background_migration/redact_links.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-require_relative 'redact_links/redactable'
-
-module Gitlab
-  module BackgroundMigration
-    class RedactLinks
-      class Note < ActiveRecord::Base
-        include EachBatch
-        include ::Gitlab::BackgroundMigration::RedactLinks::Redactable
-
-        self.table_name = 'notes'
-        self.inheritance_column = :_type_disabled
-      end
-
-      class Issue < ActiveRecord::Base
-        include EachBatch
-        include ::Gitlab::BackgroundMigration::RedactLinks::Redactable
-
-        self.table_name = 'issues'
-        self.inheritance_column = :_type_disabled
-      end
-
-      class MergeRequest < ActiveRecord::Base
-        include EachBatch
-        include ::Gitlab::BackgroundMigration::RedactLinks::Redactable
-
-        self.table_name = 'merge_requests'
-        self.inheritance_column = :_type_disabled
-      end
-
-      class Snippet < ActiveRecord::Base
-        include EachBatch
-        include ::Gitlab::BackgroundMigration::RedactLinks::Redactable
-
-        self.table_name = 'snippets'
-        self.inheritance_column = :_type_disabled
-      end
-
-      def perform(model_name, field, start_id, stop_id)
-        link_pattern = "%/sent_notifications/" + ("_" * 32) + "/unsubscribe%"
-        model = "Gitlab::BackgroundMigration::RedactLinks::#{model_name}".constantize
-
-        model.where("#{field} like ?", link_pattern).where(id: start_id..stop_id).each do |resource|
-          resource.redact_field!(field)
-        end
-      end
-    end
-  end
-end

lib/gitlab/background_migration/redact_links/redactable.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class RedactLinks
-      module Redactable
-        extend ActiveSupport::Concern
-
-        def redact_field!(field)
-          self[field].gsub!(%r{/sent_notifications/\h{32}/unsubscribe}, '/sent_notifications/REDACTED/unsubscribe')
-
-          if self.changed?
-            self.update_columns(field => self[field],
-                                "#{field}_html" => nil)
-          end
-        end
-      end
-    end
-  end
-end

lib/gitlab/background_migration/rollback_import_state_data.rb

-# frozen_string_literal: true
-
-module Gitlab
-  module BackgroundMigration
-    # This background migration migrates all the data of import_state
-    # back to the projects table for projects that are considered imports or forks
-    class RollbackImportStateData
-      def perform(start_id, end_id)
-        move_attributes_data_to_project(start_id, end_id)
-      end
-
-      def move_attributes_data_to_project(start_id, end_id)
-        Rails.logger.info("#{self.class.name} - Moving import attributes data to projects table: #{start_id} - #{end_id}")
-
-        if Gitlab::Database.mysql?
-          ActiveRecord::Base.connection.execute <<~SQL
-            UPDATE projects, project_mirror_data
-            SET
-              projects.import_status = project_mirror_data.status,
-              projects.import_jid = project_mirror_data.jid,
-              projects.import_error = project_mirror_data.last_error
-            WHERE project_mirror_data.project_id = projects.id
-            AND project_mirror_data.id BETWEEN #{start_id} AND #{end_id}
-          SQL
-        else
-          ActiveRecord::Base.connection.execute <<~SQL
-            UPDATE projects
-            SET
-              import_status = project_mirror_data.status,
-              import_jid = project_mirror_data.jid,
-              import_error = project_mirror_data.last_error
-            FROM project_mirror_data
-            WHERE project_mirror_data.project_id = projects.id
-            AND project_mirror_data.id BETWEEN #{start_id} AND #{end_id}
-          SQL
-        end
-      end
-    end
-  end
-end

lib/gitlab/background_migration/schedule_diff_files_deletion.rb

-# frozen_string_literal: true
-# rubocop:disable Style/Documentation
-
-module Gitlab
-  module BackgroundMigration
-    class ScheduleDiffFilesDeletion
-      class MergeRequestDiff < ActiveRecord::Base
-        self.table_name = 'merge_request_diffs'
-
-        belongs_to :merge_request
-
-        include EachBatch
-      end
-
-      DIFF_BATCH_SIZE = 5_000
-      INTERVAL = 5.minutes
-      MIGRATION = 'DeleteDiffFiles'
-
-      def perform
-        diffs = MergeRequestDiff
-          .from("(#{diffs_collection.to_sql}) merge_request_diffs")
-          .where('merge_request_diffs.id != merge_request_diffs.latest_merge_request_diff_id')
-          .select(:id)
-
-        diffs.each_batch(of: DIFF_BATCH_SIZE) do |relation, index|
-          ids = relation.pluck(:id)
-
-          BackgroundMigrationWorker.perform_in(index * INTERVAL, MIGRATION, [ids])
-        end
-      end
-
-      private
-
-      def diffs_collection
-        MergeRequestDiff
-          .joins(:merge_request)
-          .where("merge_requests.state = 'merged'")
-          .where('merge_requests.latest_merge_request_diff_id IS NOT NULL')
-          .where("merge_request_diffs.state NOT IN ('without_files', 'empty')")
-          .select('merge_requests.latest_merge_request_diff_id, merge_request_diffs.id')
-      end
-    end
-  end
-end

lib/gitlab/database/migration_helpers.rb

@@ -149,7 +149,7 @@ module Gitlab
       # column - The name of the column to create the foreign key on.
       # on_delete - The action to perform when associated data is removed,
       #             defaults to "CASCADE".
-      def add_concurrent_foreign_key(source, target, column:, on_delete: :cascade)
+      def add_concurrent_foreign_key(source, target, column:, on_delete: :cascade, name: nil)
         # Transactions would result in ALTER TABLE locks being held for the
         # duration of the transaction, defeating the purpose of this method.
         if transaction_open?
@@ -167,14 +167,18 @@ module Gitlab
             return
           end
 
-          return add_foreign_key(source, target,
-                                 column: column,
-                                 on_delete: on_delete)
+          key_options = { column: column, on_delete: on_delete }
+
+          # The MySQL adapter tries to create a foreign key without a name when
+          # `:name` is nil, instead of generating a name for us.
+          key_options[:name] = name if name
+
+          return add_foreign_key(source, target, key_options)
         else
           on_delete = 'SET NULL' if on_delete == :nullify
         end
 
-        key_name = concurrent_foreign_key_name(source, column)
+        key_name = name || concurrent_foreign_key_name(source, column)
 
         unless foreign_key_exists?(source, target, column: column)
           Rails.logger.warn "Foreign key not created because it exists already " \

lib/gitlab/import_export/config.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module ImportExport
+    class Config
+      # Returns a Hash of the YAML file, including EE specific data if EE is
+      # used.
+      def to_h
+        hash = parse_yaml
+        ee_hash = hash['ee']
+
+        if merge? && ee_hash
+          ee_hash.each do |key, value|
+            if key == 'project_tree'
+              merge_project_tree(value, hash[key])
+            else
+              merge_attributes_list(value, hash[key])
+            end
+          end
+        end
+
+        # We don't want to expose this section after this point, as it is no
+        # longer needed.
+        hash.delete('ee')
+
+        hash
+      end
+
+      # Merges a project relationships tree into the target tree.
+      #
+      # @param [Array<Hash|Symbol>] source_values
+      # @param [Array<Hash|Symbol>] target_values
+      def merge_project_tree(source_values, target_values)
+        source_values.each do |value|
+          if value.is_a?(Hash)
+            # Examples:
+            #
+            # { 'project_tree' => [{ 'labels' => [...] }] }
+            # { 'notes' => [:author, { 'events' => [:push_event_payload] }] }
+            value.each do |key, val|
+              target = target_values
+                .find { |h| h.is_a?(Hash) && h[key] }
+
+              if target
+                merge_project_tree(val, target[key])
+              else
+                target_values << { key => val.dup }
+              end
+            end
+          else
+            # Example: :priorities, :author, etc
+            target_values << value
+          end
+        end
+      end
+
+      # Merges a Hash containing a flat list of attributes, such as the entries
+      # in a `excluded_attributes` section.
+      #
+      # @param [Hash] source_values
+      # @param [Hash] target_values
+      def merge_attributes_list(source_values, target_values)
+        source_values.each do |key, values|
+          target_values[key] ||= []
+          target_values[key].concat(values)
+        end
+      end
+
+      def merge?
+        Gitlab.ee?
+      end
+
+      def parse_yaml
+        YAML.load_file(Gitlab::ImportExport.config_file)
+      end
+    end
+  end
+end

lib/gitlab/import_export/import_export.yml

 # Model relationships to be included in the project import/export
+#
+# This list _must_ only contain relationships that are available to both CE and
+# EE. EE specific relationships must be defined in the `ee` section further
+# down below.
 project_tree:
   - labels:
-      :priorities
+    - :priorities
   - milestones:
     - events:
       - :push_event_payload
@@ -15,18 +19,18 @@ project_tree:
         - :push_event_payload
     - label_links:
       - label:
-          :priorities
+        - :priorities
     - milestone:
       - events:
         - :push_event_payload
     - resource_label_events:
       - label:
-          :priorities
+        - :priorities
     - :issue_assignees
   - snippets:
     - :award_emoji
     - notes:
-        :author
+      - :author
   - releases:
     - :links
   - project_members:
@@ -46,13 +50,13 @@ project_tree:
     - :timelogs
     - label_links:
       - label:
-          :priorities
+        - :priorities
     - milestone:
       - events:
         - :push_event_payload
     - resource_label_events:
       - label:
-          :priorities
+        - :priorities
   - ci_pipelines:
     - notes:
       - :author
@@ -121,12 +125,22 @@ excluded_attributes:
     - :bfg_object_map
     - :detected_repository_languages
     - :tag_list
+    - :mirror_user_id
+    - :mirror_trigger_builds
+    - :only_mirror_protected_branches
+    - :pull_mirror_available_overridden
+    - :mirror_overwrites_diverged_branches
+    - :packages_enabled
+    - :mirror_last_update_at
+    - :mirror_last_successful_update_at
   namespaces:
     - :runners_token
     - :runners_token_encrypted
   project_import_state:
     - :last_error
     - :jid
+    - :last_update_at
+    - :last_successful_update_at
   prometheus_metrics:
     - :common
     - :identifier
@@ -201,3 +215,12 @@ methods:
     - :action
   project_badges:
     - :type
+
+# EE specific relationships and settings to include. All of this will be merged
+# into the previous structures if EE is used.
+ee:
+  project_tree:
+    - protected_branches:
+      - :unprotect_access_levels
+    - protected_environments:
+      - :deploy_access_levels

lib/gitlab/import_export/reader.rb

@@ -7,7 +7,7 @@ module Gitlab
 
       def initialize(shared:)
         @shared = shared
-        config_hash = YAML.load_file(Gitlab::ImportExport.config_file).deep_symbolize_keys
+        config_hash = ImportExport::Config.new.to_h.deep_symbolize_keys
         @tree = config_hash[:project_tree]
         @attributes_finder = Gitlab::ImportExport::AttributesFinder.new(included_attributes: config_hash[:included_attributes],
                                                                         excluded_attributes: config_hash[:excluded_attributes],

lib/tasks/gitlab/import_export.rake

@@ -7,7 +7,7 @@ namespace :gitlab do
 
     desc "GitLab | Display exported DB structure"
     task data: :environment do
-      puts YAML.load_file(Gitlab::ImportExport.config_file)['project_tree'].to_yaml(SortKeys: true)
+      puts Gitlab::ImportExport::Config.new.to_h['project_tree'].to_yaml(SortKeys: true)
     end
 
     desc 'GitLab | Bumps the Import/Export version in fixtures and project templates'

spec/db/schema_spec.rb

@@ -9,9 +9,13 @@ describe 'Database schema' do
   # Use if you are certain that this column should not have a foreign key
   IGNORED_FK_COLUMNS = {
     abuse_reports: %w[reporter_id user_id],
-    application_settings: %w[performance_bar_allowed_group_id],
+    application_settings: %w[performance_bar_allowed_group_id slack_app_id snowplow_site_id],
+    approvers: %w[target_id user_id],
+    approvals: %w[user_id],
+    approver_groups: %w[target_id],
     audit_events: %w[author_id entity_id],
     award_emoji: %w[awardable_id user_id],
+    boards: %w[milestone_id],
     chat_names: %w[chat_id service_id team_id user_id],
     chat_teams: %w[team_id],
     ci_builds: %w[erased_by_id runner_id trigger_request_id user_id],
@@ -21,15 +25,25 @@ describe 'Database schema' do
     cluster_providers_gcp: %w[gcp_project_id operation_id],
     deploy_keys_projects: %w[deploy_key_id],
     deployments: %w[deployable_id environment_id user_id],
+    draft_notes: %w[discussion_id],
     emails: %w[user_id],
     events: %w[target_id],
+    epics: %w[updated_by_id last_edited_by_id start_date_sourcing_milestone_id due_date_sourcing_milestone_id],
     forked_project_links: %w[forked_from_project_id],
+    geo_event_log: %w[hashed_storage_attachments_event_id],
+    geo_job_artifact_deleted_events: %w[job_artifact_id],
+    geo_lfs_object_deleted_events: %w[lfs_object_id],
+    geo_node_statuses: %w[last_event_id cursor_last_event_id],
+    geo_nodes: %w[oauth_application_id],
+    geo_repository_deleted_events: %w[project_id],
+    geo_upload_deleted_events: %w[upload_id model_id],
     identities: %w[user_id],
     issues: %w[last_edited_by_id state_id],
     jira_tracker_data: %w[jira_issue_transition_id],
     keys: %w[user_id],
     label_links: %w[target_id],
     lfs_objects_projects: %w[lfs_object_id project_id],
+    ldap_group_links: %w[group_id],
     members: %w[source_id created_by_id],
     merge_requests: %w[last_edited_by_id state_id],
     namespaces: %w[owner_id parent_id],
@@ -40,7 +54,7 @@ describe 'Database schema' do
     oauth_applications: %w[owner_id],
     project_group_links: %w[group_id],
     project_statistics: %w[namespace_id],
-    projects: %w[creator_id namespace_id ci_id],
+    projects: %w[creator_id namespace_id ci_id mirror_user_id],
     redirect_routes: %w[source_id],
     repository_languages: %w[programming_language_id],
     routes: %w[source_id],
@@ -48,14 +62,17 @@ describe 'Database schema' do
     snippets: %w[author_id],
     spam_logs: %w[user_id],
     subscriptions: %w[user_id subscribable_id],
+    slack_integrations: %w[team_id user_id],
     taggings: %w[tag_id taggable_id tagger_id],
     timelogs: %w[user_id],
     todos: %w[target_id commit_id],
     uploads: %w[model_id],
     user_agent_details: %w[subject_id],
-    users: %w[color_scheme_id created_by_id theme_id],
+    users: %w[color_scheme_id created_by_id theme_id email_opted_in_source_id],
     users_star_projects: %w[user_id],
-    web_hooks: %w[service_id],
+    vulnerability_identifiers: %w[external_id],
+    vulnerability_scanners: %w[external_id],
+    web_hooks: %w[service_id group_id],
     suggestions: %w[commit_id]
   }.with_indifferent_access.freeze
 

spec/features/projects/import_export/export_file_spec.rb

@@ -10,7 +10,7 @@ describe 'Import/Export - project export integration test', :js do
 
   let(:user) { create(:admin) }
   let(:export_path) { "#{Dir.tmpdir}/import_file_spec" }
-  let(:config_hash) { YAML.load_file(Gitlab::ImportExport.config_file).deep_stringify_keys }
+  let(:config_hash) { Gitlab::ImportExport::Config.new.to_h.deep_stringify_keys }
 
   let(:sensitive_words) { %w[pass secret token key encrypted html] }
   let(:safe_list) do

spec/lib/gitlab/background_migration/create_gpg_key_subkeys_from_gpg_keys_spec.rb

-require 'spec_helper'
-
-describe Gitlab::BackgroundMigration::CreateGpgKeySubkeysFromGpgKeys, :migration, schema: 20171005130944 do
-  context 'when GpgKey exists' do
-    let!(:gpg_key) { create(:gpg_key, key: GpgHelpers::User3.public_key) } # rubocop:disable RSpec/FactoriesInMigrationSpecs
-
-    before do
-      GpgKeySubkey.destroy_all # rubocop: disable DestroyAll
-    end
-
-    it 'generate the subkeys' do
-      expect do
-        described_class.new.perform(gpg_key.id)
-      end.to change { gpg_key.subkeys.count }.from(0).to(2)
-    end
-
-    it 'schedules the signature update worker' do
-      expect(InvalidGpgSignatureUpdateWorker).to receive(:perform_async).with(gpg_key.id)
-
-      described_class.new.perform(gpg_key.id)
-    end
-  end
-
-  context 'when GpgKey does not exist' do
-    it 'does not do anything' do
-      expect(Gitlab::Gpg).not_to receive(:subkeys_from_key)
-      expect(InvalidGpgSignatureUpdateWorker).not_to receive(:perform_async)
-
-      described_class.new.perform(123)
-    end
-  end
-end

spec/lib/gitlab/background_migration/delete_diff_files_spec.rb

-require 'spec_helper'
-
-# rubocop:disable RSpec/FactoriesInMigrationSpecs
-describe Gitlab::BackgroundMigration::DeleteDiffFiles, :migration, :sidekiq, schema: 20180619121030 do
-  describe '#perform' do
-    before do
-      # This migration was created before we introduced ProjectCiCdSetting#default_git_depth
-      allow_any_instance_of(ProjectCiCdSetting).to receive(:default_git_depth=).and_return(0)
-      allow_any_instance_of(ProjectCiCdSetting).to receive(:default_git_depth).and_return(nil)
-    end
-
-    context 'when diff files can be deleted' do
-      let(:merge_request) { create(:merge_request, :merged) }
-      let!(:merge_request_diff) do
-        merge_request.create_merge_request_diff
-        merge_request.merge_request_diffs.first
-      end
-
-      let(:perform) do
-        described_class.new.perform(MergeRequestDiff.pluck(:id))
-      end
-
-      it 'deletes all merge request diff files' do
-        expect { perform }
-          .to change { merge_request_diff.merge_request_diff_files.count }
-          .from(20).to(0)
-      end
-
-      it 'updates state to without_files' do
-        expect { perform }
-          .to change { merge_request_diff.reload.state }
-          .from('collected').to('without_files')
-      end
-
-      it 'rollsback if something goes wrong' do
-        expect(described_class::MergeRequestDiffFile).to receive_message_chain(:where, :delete_all)
-          .and_raise
-
-        expect { perform }
-          .to raise_error
-
-        merge_request_diff.reload
-
-        expect(merge_request_diff.state).to eq('collected')
-        expect(merge_request_diff.merge_request_diff_files.count).to eq(20)
-      end
-    end
-
-    it 'reschedules itself when should_wait_deadtuple_vacuum' do
-      merge_request = create(:merge_request, :merged)
-      first_diff = merge_request.merge_request_diff
-      second_diff = merge_request.create_merge_request_diff
-
-      Sidekiq::Testing.fake! do
-        worker = described_class.new
-        allow(worker).to receive(:should_wait_deadtuple_vacuum?) { true }
-
-        worker.perform([first_diff.id, second_diff.id])
-
-        expect(described_class.name.demodulize).to be_scheduled_delayed_migration(5.minutes, [first_diff.id, second_diff.id])
-        expect(BackgroundMigrationWorker.jobs.size).to eq(1)
-      end
-    end
-  end
-
-  describe '#should_wait_deadtuple_vacuum?' do
-    it 'returns true when hitting merge_request_diff_files hits DEAD_TUPLES_THRESHOLD', :postgresql do
-      worker = described_class.new
-      threshold_query_result = [{ "n_dead_tup" => described_class::DEAD_TUPLES_THRESHOLD.to_s }]
-      normal_query_result = [{ "n_dead_tup" => '3' }]
-
-      allow(worker)
-        .to receive(:execute_statement)
-        .with(/SELECT n_dead_tup */)
-        .and_return(threshold_query_result, normal_query_result)
-
-      expect(worker.should_wait_deadtuple_vacuum?).to be(true)
-    end
-  end
-end
-# rubocop:enable RSpec/FactoriesInMigrationSpecs

spec/lib/gitlab/background_migration/merge_request_assignees_migration_progress_check_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::BackgroundMigration::MergeRequestAssigneesMigrationProgressCheck do
+  context 'rescheduling' do
+    context 'when there are ongoing and no dead jobs' do
+      it 'reschedules check' do
+        allow(Gitlab::BackgroundMigration).to receive(:exists?)
+                                                .with('PopulateMergeRequestAssigneesTable')
+                                                .and_return(true)
+
+        allow(Gitlab::BackgroundMigration).to receive(:dead_jobs?)
+                                                .with('PopulateMergeRequestAssigneesTable')
+                                                .and_return(false)
+
+        expect(BackgroundMigrationWorker).to receive(:perform_in).with(described_class::RESCHEDULE_DELAY, described_class.name)
+
+        described_class.new.perform
+      end
+    end
+
+    context 'when there are ongoing and dead jobs' do
+      it 'reschedules check' do
+        allow(Gitlab::BackgroundMigration).to receive(:exists?)
+                                                .with('PopulateMergeRequestAssigneesTable')
+                                                .and_return(true)
+
+        allow(Gitlab::BackgroundMigration).to receive(:dead_jobs?)
+                                                .with('PopulateMergeRequestAssigneesTable')
+                                                .and_return(true)
+
+        expect(BackgroundMigrationWorker).to receive(:perform_in).with(described_class::RESCHEDULE_DELAY, described_class.name)
+
+        described_class.new.perform
+      end
+    end
+
+    context 'when there retrying jobs and no scheduled' do
+      it 'reschedules check' do
+        allow(Gitlab::BackgroundMigration).to receive(:exists?)
+                                                .with('PopulateMergeRequestAssigneesTable')
+                                                .and_return(false)
+
+        allow(Gitlab::BackgroundMigration).to receive(:retrying_jobs?)
+                                                .with('PopulateMergeRequestAssigneesTable')
+                                                .and_return(true)
+
+        expect(BackgroundMigrationWorker).to receive(:perform_in).with(described_class::RESCHEDULE_DELAY, described_class.name)
+
+        described_class.new.perform
+      end
+    end
+  end
+
+  context 'when there are no scheduled, or retrying or dead' do
+    it 'enables feature' do
+      allow(Gitlab::BackgroundMigration).to receive(:exists?)
+                                              .with('PopulateMergeRequestAssigneesTable')
+                                              .and_return(false)
+
+      allow(Gitlab::BackgroundMigration).to receive(:retrying_jobs?)
+                                              .with('PopulateMergeRequestAssigneesTable')
+                                              .and_return(false)
+
+      allow(Gitlab::BackgroundMigration).to receive(:dead_jobs?)
+                                              .with('PopulateMergeRequestAssigneesTable')
+                                              .and_return(false)
+
+      expect(Feature).to receive(:enable).with(:multiple_merge_request_assignees)
+
+      described_class.new.perform
+    end
+  end
+
+  context 'when there are only dead jobs' do
+    it 'raises DeadJobsError error' do
+      allow(Gitlab::BackgroundMigration).to receive(:exists?)
+                                              .with('PopulateMergeRequestAssigneesTable')
+                                              .and_return(false)
+
+      allow(Gitlab::BackgroundMigration).to receive(:retrying_jobs?)
+                                              .with('PopulateMergeRequestAssigneesTable')
+                                              .and_return(false)
+
+      allow(Gitlab::BackgroundMigration).to receive(:dead_jobs?)
+                                              .with('PopulateMergeRequestAssigneesTable')
+                                              .and_return(true)
+
+      expect { described_class.new.perform }
+        .to raise_error(described_class::DeadJobsError,
+                        "Only dead background jobs in the queue for #{described_class::WORKER}")
+    end
+  end
+end

spec/lib/gitlab/background_migration/populate_external_pipeline_source_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-# rubocop:disable RSpec/FactoriesInMigrationSpecs
-describe Gitlab::BackgroundMigration::PopulateExternalPipelineSource, :migration, schema: 20180916011959 do
-  let(:migration) { described_class.new }
-
-  before do
-    # This migration was created before we introduced metadata configs
-    stub_feature_flags(ci_build_metadata_config: false)
-    # This migration was created before we introduced ProjectCiCdSetting#default_git_depth
-    allow_any_instance_of(ProjectCiCdSetting).to receive(:default_git_depth).and_return(nil)
-    allow_any_instance_of(ProjectCiCdSetting).to receive(:default_git_depth=).and_return(0)
-  end
-
-  let!(:internal_pipeline) { create(:ci_pipeline, source: :web) }
-  let(:pipelines) { [internal_pipeline, unknown_pipeline].map(&:id) }
-
-  let!(:unknown_pipeline) do
-    build(:ci_pipeline, source: :unknown)
-      .tap { |pipeline| pipeline.save(validate: false) }
-  end
-
-  subject { migration.perform(pipelines.min, pipelines.max) }
-
-  shared_examples 'no changes' do
-    it 'does not change the pipeline source' do
-      expect { subject }.not_to change { unknown_pipeline.reload.source }
-    end
-  end
-
-  context 'when unknown pipeline is external' do
-    before do
-      create(:generic_commit_status, pipeline: unknown_pipeline)
-    end
-
-    it 'populates the pipeline source' do
-      subject
-
-      expect(unknown_pipeline.reload.source).to eq('external')
-    end
-
-    it 'can be repeated without effect' do
-      subject
-
-      expect { subject }.not_to change { unknown_pipeline.reload.source }
-    end
-  end
-
-  context 'when unknown pipeline has just a build' do
-    before do
-      create(:ci_build, pipeline: unknown_pipeline)
-    end
-
-    it_behaves_like 'no changes'
-  end
-
-  context 'when unknown pipeline has no statuses' do
-    it_behaves_like 'no changes'
-  end
-
-  context 'when unknown pipeline has a build and a status' do
-    before do
-      create(:generic_commit_status, pipeline: unknown_pipeline)
-      create(:ci_build, pipeline: unknown_pipeline)
-    end
-
-    it_behaves_like 'no changes'
-  end
-end
-# rubocop:enable RSpec/FactoriesInMigrationSpecs

spec/lib/gitlab/background_migration/populate_import_state_spec.rb

-require 'spec_helper'
-
-describe Gitlab::BackgroundMigration::PopulateImportState, :migration, schema: 20180502134117 do
-  let(:migration) { described_class.new }
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:import_state) { table(:project_mirror_data) }
-
-  before do
-    namespaces.create(id: 1, name: 'gitlab-org', path: 'gitlab-org')
-
-    projects.create!(id: 1, namespace_id: 1, name: 'gitlab1',
-                     path: 'gitlab1', import_error: "foo", import_status: :started,
-                     import_url: generate(:url))
-    projects.create!(id: 2, namespace_id: 1, name: 'gitlab2', path: 'gitlab2',
-                     import_status: :none, import_url: generate(:url))
-    projects.create!(id: 3, namespace_id: 1, name: 'gitlab3',
-                     path: 'gitlab3', import_error: "bar", import_status: :failed,
-                     import_url: generate(:url))
-
-    allow(BackgroundMigrationWorker).to receive(:perform_in)
-  end
-
-  it "creates new import_state records with project's import data" do
-    expect(projects.where.not(import_status: :none).count).to eq(2)
-
-    expect do
-      migration.perform(1, 3)
-    end.to change { import_state.all.count }.from(0).to(2)
-
-    expect(import_state.first.last_error).to eq("foo")
-    expect(import_state.last.last_error).to eq("bar")
-    expect(import_state.first.status).to eq("started")
-    expect(import_state.last.status).to eq("failed")
-    expect(projects.first.import_status).to eq("none")
-    expect(projects.last.import_status).to eq("none")
-  end
-end

spec/lib/gitlab/background_migration/populate_merge_request_metrics_with_events_data_improved_spec.rb

-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe Gitlab::BackgroundMigration::PopulateMergeRequestMetricsWithEventsDataImproved, :migration, schema: 20181204154019 do
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:users) { table(:users) }
-  let(:events) { table(:events) }
-
-  let(:user) { users.create!(email: 'test@example.com', projects_limit: 100, username: 'test') }
-
-  let(:namespace) { namespaces.create(name: 'gitlab', path: 'gitlab-org') }
-  let(:project) { projects.create(namespace_id: namespace.id, name: 'foo') }
-  let(:merge_requests) { table(:merge_requests) }
-
-  def create_merge_request(id, params = {})
-    params.merge!(id: id,
-                  target_project_id: project.id,
-                  target_branch: 'master',
-                  source_project_id: project.id,
-                  source_branch: 'mr name',
-                  title: "mr name#{id}")
-
-    merge_requests.create(params)
-  end
-
-  def create_merge_request_event(id, params = {})
-    params.merge!(id: id,
-                  project_id: project.id,
-                  author_id: user.id,
-                  target_type: 'MergeRequest')
-
-    events.create(params)
-  end
-
-  describe '#perform' do
-    it 'creates and updates closed and merged events' do
-      timestamp = Time.new('2018-01-01 12:00:00').utc
-
-      create_merge_request(1)
-      create_merge_request_event(1, target_id: 1, action: 3, updated_at: timestamp)
-      create_merge_request_event(2, target_id: 1, action: 3, updated_at: timestamp + 10.seconds)
-
-      create_merge_request_event(3, target_id: 1, action: 7, updated_at: timestamp)
-      create_merge_request_event(4, target_id: 1, action: 7, updated_at: timestamp + 10.seconds)
-
-      subject.perform(1, 1)
-
-      merge_request = MergeRequest.first
-
-      expect(merge_request.metrics).to have_attributes(latest_closed_by_id: user.id,
-                                                       latest_closed_at: timestamp + 10.seconds,
-                                                       merged_by_id: user.id)
-    end
-  end
-end

spec/lib/gitlab/background_migration/populate_merge_request_metrics_with_events_data_spec.rb

-require 'rails_helper'
-
-# rubocop:disable RSpec/FactoriesInMigrationSpecs
-describe Gitlab::BackgroundMigration::PopulateMergeRequestMetricsWithEventsData, :migration, schema: 20171128214150 do
-  # commits_count attribute is added in a next migration
-  before do
-    allow_any_instance_of(MergeRequestDiff)
-      .to receive(:commits_count=).and_return(nil)
-  end
-
-  describe '#perform' do
-    let(:mr_with_event) { create(:merge_request) }
-    let!(:merged_event) { create(:event, :merged, target: mr_with_event) }
-    let!(:closed_event) { create(:event, :closed, target: mr_with_event) }
-
-    before do
-      # Make sure no metrics are created and kept through after_* callbacks.
-      mr_with_event.metrics.destroy!
-    end
-
-    it 'inserts metrics and updates closed and merged events' do
-      subject.perform(mr_with_event.id, mr_with_event.id)
-
-      mr_with_event.reload
-
-      expect(mr_with_event.metrics).to have_attributes(latest_closed_by_id: closed_event.author_id,
-                                                       merged_by_id: merged_event.author_id)
-      expect(mr_with_event.metrics.latest_closed_at.to_s).to eq(closed_event.updated_at.to_s)
-    end
-  end
-
-  describe '#insert_metrics_for_range' do
-    let!(:mrs_without_metrics) { create_list(:merge_request, 3) }
-    let!(:mrs_with_metrics) { create_list(:merge_request, 2) }
-
-    before do
-      # Make sure no metrics are created and kept through after_* callbacks.
-      mrs_without_metrics.each { |m| m.metrics.destroy! }
-    end
-
-    it 'inserts merge_request_metrics for merge_requests without one' do
-      expect { subject.insert_metrics_for_range(MergeRequest.first.id, MergeRequest.last.id) }
-        .to change(MergeRequest::Metrics, :count).from(2).to(5)
-
-      mrs_without_metrics.each do |mr_without_metrics|
-        expect(mr_without_metrics.reload.metrics).to be_present
-      end
-    end
-
-    it 'does not inserts merge_request_metrics for MRs out of given range' do
-      expect { subject.insert_metrics_for_range(mrs_with_metrics.first.id, mrs_with_metrics.last.id) }
-        .not_to change(MergeRequest::Metrics, :count).from(2)
-    end
-  end
-
-  describe '#update_metrics_with_events_data' do
-    context 'closed events data update' do
-      let(:users) { create_list(:user, 3) }
-      let(:mrs_with_event) { create_list(:merge_request, 3) }
-
-      before do
-        create_list(:event, 2, :closed, author: users.first, target: mrs_with_event.first)
-        create_list(:event, 3, :closed, author: users.second, target: mrs_with_event.second)
-        create(:event, :closed, author: users.third, target: mrs_with_event.third)
-      end
-
-      it 'migrates multiple MR metrics with closed event data' do
-        mr_without_event = create(:merge_request)
-        create(:event, :merged)
-
-        subject.update_metrics_with_events_data(mrs_with_event.first.id, mrs_with_event.last.id)
-
-        mrs_with_event.each do |mr_with_event|
-          latest_event = Event.where(action: 3, target: mr_with_event).last
-
-          mr_with_event.metrics.reload
-
-          expect(mr_with_event.metrics.latest_closed_by).to eq(latest_event.author)
-          expect(mr_with_event.metrics.latest_closed_at.to_s).to eq(latest_event.updated_at.to_s)
-        end
-
-        expect(mr_without_event.metrics.reload).to have_attributes(latest_closed_by_id: nil,
-                                                                   latest_closed_at: nil)
-      end
-
-      it 'does not updates metrics out of given range' do
-        out_of_range_mr = create(:merge_request)
-        create(:event, :closed, author: users.last, target: out_of_range_mr)
-
-        expect { subject.perform(mrs_with_event.first.id, mrs_with_event.second.id) }
-          .not_to change { out_of_range_mr.metrics.reload.merged_by }
-          .from(nil)
-      end
-    end
-
-    context 'merged events data update' do
-      let(:users) { create_list(:user, 3) }
-      let(:mrs_with_event) { create_list(:merge_request, 3) }
-
-      before do
-        create_list(:event, 2, :merged, author: users.first, target: mrs_with_event.first)
-        create_list(:event, 3, :merged, author: users.second, target: mrs_with_event.second)
-        create(:event, :merged, author: users.third, target: mrs_with_event.third)
-      end
-
-      it 'migrates multiple MR metrics with merged event data' do
-        mr_without_event = create(:merge_request)
-        create(:event, :merged)
-
-        subject.update_metrics_with_events_data(mrs_with_event.first.id, mrs_with_event.last.id)
-
-        mrs_with_event.each do |mr_with_event|
-          latest_event = Event.where(action: Event::MERGED, target: mr_with_event).last
-
-          expect(mr_with_event.metrics.reload.merged_by).to eq(latest_event.author)
-        end
-
-        expect(mr_without_event.metrics.reload).to have_attributes(merged_by_id: nil)
-      end
-
-      it 'does not updates metrics out of given range' do
-        out_of_range_mr = create(:merge_request)
-        create(:event, :merged, author: users.last, target: out_of_range_mr)
-
-        expect { subject.perform(mrs_with_event.first.id, mrs_with_event.second.id) }
-          .not_to change { out_of_range_mr.metrics.reload.merged_by }
-          .from(nil)
-      end
-    end
-  end
-end
-# rubocop:enable RSpec/FactoriesInMigrationSpecs

spec/lib/gitlab/background_migration/redact_links_spec.rb

-require 'spec_helper'
-
-describe Gitlab::BackgroundMigration::RedactLinks, :migration, schema: 20181014121030 do
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:issues) { table(:issues) }
-  let(:notes) { table(:notes) }
-  let(:snippets) { table(:snippets) }
-  let(:users) { table(:users) }
-  let(:merge_requests) { table(:merge_requests) }
-  let(:namespace) { namespaces.create(name: 'gitlab', path: 'gitlab-org') }
-  let(:project) { projects.create(namespace_id: namespace.id, name: 'foo') }
-  let(:user) { users.create!(email: 'test@example.com', projects_limit: 100, username: 'test') }
-
-  def create_merge_request(id, params)
-    params.merge!(id: id,
-                  target_project_id: project.id,
-                  target_branch: 'master',
-                  source_project_id: project.id,
-                  source_branch: 'mr name',
-                  title: "mr name#{id}")
-
-    merge_requests.create(params)
-  end
-
-  def create_issue(id, params)
-    params.merge!(id: id, title: "issue#{id}", project_id: project.id)
-
-    issues.create(params)
-  end
-
-  def create_note(id, params)
-    params[:id] = id
-
-    notes.create(params)
-  end
-
-  def create_snippet(id, params)
-    params.merge!(id: id, author_id: user.id)
-
-    snippets.create(params)
-  end
-
-  def create_resource(model, id, params)
-    send("create_#{model.name.underscore}", id, params)
-  end
-
-  shared_examples_for 'redactable resource' do
-    it 'updates only matching texts' do
-      matching_text = 'some text /sent_notifications/00000000000000000000000000000000/unsubscribe more text'
-      redacted_text = 'some text /sent_notifications/REDACTED/unsubscribe more text'
-      create_resource(model, 1, { field => matching_text })
-      create_resource(model, 2, { field => 'not matching text' })
-      create_resource(model, 3, { field => matching_text })
-      create_resource(model, 4, { field => redacted_text })
-      create_resource(model, 5, { field => matching_text })
-
-      expected = { field => 'some text /sent_notifications/REDACTED/unsubscribe more text',
-                   "#{field}_html" => nil }
-      expect_any_instance_of("Gitlab::BackgroundMigration::RedactLinks::#{model}".constantize).to receive(:update_columns).with(expected).and_call_original
-
-      subject.perform(model, field, 2, 4)
-
-      expect(model.where(field => matching_text).pluck(:id)).to eq [1, 5]
-      expect(model.find(3).reload[field]).to eq redacted_text
-    end
-  end
-
-  context 'resource is Issue' do
-    it_behaves_like 'redactable resource' do
-      let(:model) { Issue }
-      let(:field) { :description }
-    end
-  end
-
-  context 'resource is Merge Request' do
-    it_behaves_like 'redactable resource' do
-      let(:model) { MergeRequest }
-      let(:field) { :description }
-    end
-  end
-
-  context 'resource is Note' do
-    it_behaves_like 'redactable resource' do
-      let(:model) { Note }
-      let(:field) { :note }
-    end
-  end
-
-  context 'resource is Snippet' do
-    it_behaves_like 'redactable resource' do
-      let(:model) { Snippet }
-      let(:field) { :description }
-    end
-  end
-end

spec/lib/gitlab/background_migration/rollback_import_state_data_spec.rb

-require 'spec_helper'
-
-describe Gitlab::BackgroundMigration::RollbackImportStateData, :migration, schema: 20180502134117 do
-  let(:migration) { described_class.new }
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:import_state) { table(:project_mirror_data) }
-
-  before do
-    namespaces.create(id: 1, name: 'gitlab-org', path: 'gitlab-org')
-
-    projects.create!(id: 1, namespace_id: 1, name: 'gitlab1', import_url: generate(:url))
-    projects.create!(id: 2, namespace_id: 1, name: 'gitlab2', path: 'gitlab2', import_url: generate(:url))
-
-    import_state.create!(id: 1, project_id: 1, status: :started, last_error: "foo")
-    import_state.create!(id: 2, project_id: 2, status: :failed)
-
-    allow(BackgroundMigrationWorker).to receive(:perform_in)
-  end
-
-  it "creates new import_state records with project's import data" do
-    migration.perform(1, 2)
-
-    expect(projects.first.import_status).to eq("started")
-    expect(projects.second.import_status).to eq("failed")
-    expect(projects.first.import_error).to eq("foo")
-  end
-end

spec/lib/gitlab/background_migration/schedule_diff_files_deletion_spec.rb

-require 'spec_helper'
-
-describe Gitlab::BackgroundMigration::ScheduleDiffFilesDeletion, :migration, :sidekiq, schema: 20180619121030 do
-  describe '#perform' do
-    let(:merge_request_diffs) { table(:merge_request_diffs) }
-    let(:merge_requests) { table(:merge_requests) }
-    let(:namespaces) { table(:namespaces) }
-    let(:projects) { table(:projects) }
-
-    before do
-      stub_const("#{described_class.name}::DIFF_BATCH_SIZE", 3)
-
-      namespaces.create!(id: 1, name: 'gitlab', path: 'gitlab')
-      projects.create!(id: 1, namespace_id: 1, name: 'gitlab', path: 'gitlab')
-
-      merge_requests.create!(id: 1, target_project_id: 1, source_project_id: 1, target_branch: 'feature', source_branch: 'master', state: 'merged')
-
-      merge_request_diffs.create!(id: 1, merge_request_id: 1, state: 'collected')
-      merge_request_diffs.create!(id: 2, merge_request_id: 1, state: 'empty')
-      merge_request_diffs.create!(id: 3, merge_request_id: 1, state: 'without_files')
-      merge_request_diffs.create!(id: 4, merge_request_id: 1, state: 'collected')
-      merge_request_diffs.create!(id: 5, merge_request_id: 1, state: 'collected')
-      merge_request_diffs.create!(id: 6, merge_request_id: 1, state: 'collected')
-      merge_request_diffs.create!(id: 7, merge_request_id: 1, state: 'collected')
-
-      merge_requests.update(1, latest_merge_request_diff_id: 7)
-    end
-
-    it 'correctly schedules diff file deletion workers' do
-      Sidekiq::Testing.fake! do
-        Timecop.freeze do
-          described_class.new.perform
-
-          expect(described_class::MIGRATION).to be_scheduled_delayed_migration(5.minutes, [1, 4, 5])
-
-          expect(described_class::MIGRATION).to be_scheduled_delayed_migration(10.minutes, [6])
-
-          expect(BackgroundMigrationWorker.jobs.size).to eq(2)
-        end
-      end
-    end
-  end
-end

spec/lib/gitlab/danger/helper_spec.rb

@@ -162,7 +162,6 @@ describe Gitlab::Danger::Helper do
       'db/foo' | :database
       'qa/foo' | :qa
 
-      'ee/db/foo' | :database
       'ee/qa/foo' | :qa
 
       'changelogs/foo'    | :none

spec/lib/gitlab/database/migration_helpers_spec.rb

@@ -214,6 +214,23 @@ describe Gitlab::Database::MigrationHelpers do
           model.add_concurrent_foreign_key(:projects, :users, column: :user_id)
         end
 
+        it 'allows the use of a custom key name' do
+          expect(model).to receive(:add_foreign_key).with(
+            :projects,
+            :users,
+            column: :user_id,
+            on_delete: :cascade,
+            name: :foo
+          )
+
+          model.add_concurrent_foreign_key(
+            :projects,
+            :users,
+            column: :user_id,
+            name: :foo
+          )
+        end
+
         it 'does not create a foreign key if it exists already' do
           expect(model).to receive(:foreign_key_exists?).with(:projects, :users, column: :user_id).and_return(true)
           expect(model).not_to receive(:add_foreign_key)
@@ -257,6 +274,16 @@ describe Gitlab::Database::MigrationHelpers do
 
           model.add_concurrent_foreign_key(:projects, :users, column: :user_id)
         end
+
+        it 'allows the use of a custom key name' do
+          expect(model).to receive(:disable_statement_timeout).and_call_original
+          expect(model).to receive(:execute).with(/statement_timeout/)
+          expect(model).to receive(:execute).ordered.with(/NOT VALID/)
+          expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT.+foo/)
+          expect(model).to receive(:execute).with(/RESET ALL/)
+
+          model.add_concurrent_foreign_key(:projects, :users, column: :user_id, name: :foo)
+        end
       end
     end
   end

spec/lib/gitlab/import_export/all_models.yml

@@ -20,6 +20,9 @@ issues:
 - timelogs
 - issue_assignees
 - closed_by
+- epic_issue
+- epic
+- designs
 events:
 - author
 - project
@@ -38,6 +41,7 @@ notes:
 - system_note_metadata
 - note_diff_file
 - suggestions
+- review
 label_links:
 - target
 - label
@@ -57,6 +61,7 @@ milestone:
 - merge_requests
 - participants
 - events
+- boards
 snippets:
 - author
 - project
@@ -103,6 +108,19 @@ merge_requests:
 - merge_request_assignees
 - suggestions
 - assignees
+- reviews
+- approval_rules
+- approvals
+- approvers
+- approver_users
+- approver_groups
+- approved_by_users
+- draft_notes
+- merge_train
+- blocks_as_blocker
+- blocks_as_blockee
+- blocking_merge_requests
+- blocked_merge_requests
 merge_request_diff:
 - merge_request
 - merge_request_diff_commits
@@ -135,6 +153,16 @@ ci_pipelines:
 - deployments
 - environments
 - chat_data
+- source_pipeline
+- source_bridge
+- source_job
+- sourced_pipelines
+- triggered_by_pipeline
+- triggered_pipelines
+- downstream_bridges
+- job_artifacts
+- vulnerabilities_occurrence_pipelines
+- vulnerabilities
 pipeline_variables:
 - pipeline
 stages:
@@ -184,13 +212,18 @@ protected_branches:
 - project
 - merge_access_levels
 - push_access_levels
+- unprotect_access_levels
 protected_tags:
 - project
 - create_access_levels
 merge_access_levels:
 - protected_branch
+- user
+- group
 push_access_levels:
 - protected_branch
+- user
+- group
 create_access_levels:
 - user
 - protected_tag
@@ -325,6 +358,45 @@ project:
 - kubernetes_namespaces
 - error_tracking_setting
 - metrics_setting
+- gitlab_slack_application_service
+- github_service
+- protected_environments
+- mirror_user
+- push_rule
+- jenkins_service
+- jenkins_deprecated_service
+- index_status
+- feature_usage
+- approval_rules
+- approvers
+- approver_users
+- pages_domains
+- audit_events
+- path_locks
+- approver_groups
+- repository_state
+- source_pipelines
+- sourced_pipelines
+- prometheus_metrics
+- vulnerabilities
+- vulnerability_feedback
+- vulnerability_identifiers
+- vulnerability_scanners
+- operations_feature_flags
+- operations_feature_flags_client
+- prometheus_alerts
+- prometheus_alert_events
+- software_license_policies
+- project_registry
+- packages
+- package_files
+- tracing_setting
+- alerting_setting
+- webide_pipelines
+- reviews
+- incident_management_setting
+- merge_trains
+- designs
 award_emoji:
 - awardable
 - user
@@ -332,6 +404,7 @@ priorities:
 - label
 prometheus_metrics:
 - project
+- prometheus_alerts
 timelogs:
 - issue
 - merge_request
@@ -365,3 +438,34 @@ suggestions:
 - note
 metrics_setting:
 - project
+protected_environments:
+- project
+- deploy_access_levels
+deploy_access_levels:
+- protected_environment
+- user
+- group
+unprotect_access_levels:
+- user
+- protected_branch
+- group
+prometheus_alerts:
+- project
+- prometheus_alert_events
+prometheus_alert_events:
+- project
+epic_issues:
+- issue
+- epic
+tracing_setting:
+- project
+reviews:
+- project
+- merge_request
+- author
+- notes
+incident_management_setting:
+- project
+merge_trains:
+- project
+- merge_request

spec/lib/gitlab/import_export/attribute_configuration_spec.rb

@@ -10,7 +10,7 @@ require 'spec_helper'
 describe 'Import/Export attribute configuration' do
   include ConfigurationHelper
 
-  let(:config_hash) { YAML.load_file(Gitlab::ImportExport.config_file).deep_stringify_keys }
+  let(:config_hash) { Gitlab::ImportExport::Config.new.to_h.deep_stringify_keys }
   let(:relation_names) do
     names = names_from_tree(config_hash['project_tree'])
 
@@ -23,9 +23,6 @@ describe 'Import/Export attribute configuration' do
   let(:safe_attributes_file) { 'spec/lib/gitlab/import_export/safe_model_attributes.yml' }
   let(:safe_model_attributes) { YAML.load_file(safe_attributes_file) }
 
-  let(:ee_safe_attributes_file) { 'ee/spec/lib/gitlab/import_export/safe_model_attributes.yml' }
-  let(:ee_safe_model_attributes) { File.exist?(ee_safe_attributes_file) ? YAML.load_file(ee_safe_attributes_file) : {} }
-
   it 'has no new columns' do
     relation_names.each do |relation_name|
       relation_class = relation_class_for_name(relation_name)
@@ -34,10 +31,6 @@ describe 'Import/Export attribute configuration' do
       current_attributes = parsed_attributes(relation_name, relation_attributes)
       safe_attributes = safe_model_attributes[relation_class.to_s].dup || []
 
-      ee_safe_model_attributes[relation_class.to_s].to_a.each do |attribute|
-        safe_attributes << attribute
-      end
-
       expect(safe_attributes).not_to be_nil, "Expected exported class #{relation_class} to exist in safe_model_attributes"
 
       new_attributes = current_attributes - safe_attributes
@@ -51,8 +44,7 @@ describe 'Import/Export attribute configuration' do
       It looks like #{relation_class}, which is exported using the project Import/Export, has new attributes: #{new_attributes.join(',')}
 
       Please add the attribute(s) to SAFE_MODEL_ATTRIBUTES if you consider this can be exported.
-      #{"If the model/associations are EE-specific, use `#{File.expand_path(ee_safe_attributes_file)}`.\n" if ee_safe_model_attributes.any?}
-      Otherwise, please blacklist the attribute(s) in IMPORT_EXPORT_CONFIG by adding it to its correspondent
+      Please blacklist the attribute(s) in IMPORT_EXPORT_CONFIG by adding it to its correspondent
       model in the +excluded_attributes+ section.
 
       SAFE_MODEL_ATTRIBUTES: #{File.expand_path(safe_attributes_file)}

spec/lib/gitlab/import_export/config_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::ImportExport::Config do
+  let(:yaml_file) { described_class.new }
+
+  describe '#to_h' do
+    context 'when using CE' do
+      before do
+        allow(yaml_file)
+          .to receive(:merge?)
+          .and_return(false)
+      end
+
+      it 'just returns the parsed Hash without the EE section' do
+        expected = YAML.load_file(Gitlab::ImportExport.config_file)
+        expected.delete('ee')
+
+        expect(yaml_file.to_h).to eq(expected)
+      end
+    end
+
+    context 'when using EE' do
+      before do
+        allow(yaml_file)
+          .to receive(:merge?)
+          .and_return(true)
+      end
+
+      it 'merges the EE project tree into the CE project tree' do
+        allow(yaml_file)
+          .to receive(:parse_yaml)
+          .and_return({
+            'project_tree' => [
+              {
+                'issues' => [
+                  :id,
+                  :title,
+                  { 'notes' => [:id, :note, { 'author' => [:name] }] }
+                ]
+              }
+            ],
+            'ee' => {
+              'project_tree' => [
+                {
+                  'issues' => [
+                    :description,
+                    { 'notes' => [:date, { 'author' => [:email] }] }
+                  ]
+                },
+                { 'foo' => [{ 'bar' => %i[baz] }] }
+              ]
+            }
+          })
+
+        expect(yaml_file.to_h).to eq({
+          'project_tree' => [
+            {
+              'issues' => [
+                :id,
+                :title,
+                {
+                  'notes' => [
+                    :id,
+                    :note,
+                    { 'author' => [:name, :email] },
+                    :date
+                  ]
+                },
+                :description
+              ]
+            },
+            { 'foo' => [{ 'bar' => %i[baz] }] }
+          ]
+        })
+      end
+
+      it 'merges the excluded attributes list' do
+        allow(yaml_file)
+          .to receive(:parse_yaml)
+          .and_return({
+            'project_tree' => [],
+            'excluded_attributes' => {
+              'project' => %i[id title],
+              'notes' => %i[id]
+            },
+            'ee' => {
+              'project_tree' => [],
+              'excluded_attributes' => {
+                'project' => %i[date],
+                'foo' => %i[bar baz]
+              }
+            }
+          })
+
+        expect(yaml_file.to_h).to eq({
+          'project_tree' => [],
+          'excluded_attributes' => {
+            'project' => %i[id title date],
+            'notes' => %i[id],
+            'foo' => %i[bar baz]
+          }
+        })
+      end
+
+      it 'merges the included attributes list' do
+        allow(yaml_file)
+          .to receive(:parse_yaml)
+          .and_return({
+            'project_tree' => [],
+            'included_attributes' => {
+              'project' => %i[id title],
+              'notes' => %i[id]
+            },
+            'ee' => {
+              'project_tree' => [],
+              'included_attributes' => {
+                'project' => %i[date],
+                'foo' => %i[bar baz]
+              }
+            }
+          })
+
+        expect(yaml_file.to_h).to eq({
+          'project_tree' => [],
+          'included_attributes' => {
+            'project' => %i[id title date],
+            'notes' => %i[id],
+            'foo' => %i[bar baz]
+          }
+        })
+      end
+
+      it 'merges the methods list' do
+        allow(yaml_file)
+          .to receive(:parse_yaml)
+          .and_return({
+            'project_tree' => [],
+            'methods' => {
+              'project' => %i[id title],
+              'notes' => %i[id]
+            },
+            'ee' => {
+              'project_tree' => [],
+              'methods' => {
+                'project' => %i[date],
+                'foo' => %i[bar baz]
+              }
+            }
+          })
+
+        expect(yaml_file.to_h).to eq({
+          'project_tree' => [],
+          'methods' => {
+            'project' => %i[id title date],
+            'notes' => %i[id],
+            'foo' => %i[bar baz]
+          }
+        })
+      end
+    end
+  end
+end

spec/lib/gitlab/import_export/model_configuration_spec.rb

@@ -6,7 +6,7 @@ require 'spec_helper'
 describe 'Import/Export model configuration' do
   include ConfigurationHelper
 
-  let(:config_hash) { YAML.load_file(Gitlab::ImportExport.config_file).deep_stringify_keys }
+  let(:config_hash) { Gitlab::ImportExport::Config.new.to_h.deep_stringify_keys }
   let(:model_names) do
     names = names_from_tree(config_hash['project_tree'])
 
@@ -16,26 +16,9 @@ describe 'Import/Export model configuration' do
     # - User, Author... Models we do not care about for checking models
     names.flatten.uniq - %w(milestones labels user author) + ['project']
   end
-  let(:ce_models_yml) { 'spec/lib/gitlab/import_export/all_models.yml' }
-  let(:ce_models_hash) { YAML.load_file(ce_models_yml) }
-
-  let(:ee_models_yml) { 'ee/spec/lib/gitlab/import_export/all_models.yml' }
-  let(:ee_models_hash) { File.exist?(ee_models_yml) ? YAML.load_file(ee_models_yml) : {} }
-
+  let(:all_models_yml) { 'spec/lib/gitlab/import_export/all_models.yml' }
+  let(:all_models_hash) { YAML.load_file(all_models_yml) }
   let(:current_models) { setup_models }
-  let(:all_models_hash) do
-    all_models_hash = ce_models_hash.dup
-
-    all_models_hash.each do |model, associations|
-      associations.concat(ee_models_hash[model] || [])
-    end
-
-    ee_models_hash.each do |model, associations|
-      all_models_hash[model] ||= associations
-    end
-
-    all_models_hash
-  end
 
   it 'has no new models' do
     model_names.each do |model_name|
@@ -59,8 +42,7 @@ describe 'Import/Export model configuration' do
 
       If you think this model should be included in the export, please add it to `#{Gitlab::ImportExport.config_file}`.
 
-      Definitely add it to `#{File.expand_path(ce_models_yml)}`
-      #{"or `#{File.expand_path(ee_models_yml)}` if the model/associations are EE-specific\n" if ee_models_hash.any?}
+      Definitely add it to `#{File.expand_path(all_models_yml)}`
       to signal that you've handled this error and to prevent it from showing up in the future.
     MSG
   end

spec/lib/gitlab/import_export/safe_model_attributes.yml

@@ -24,6 +24,7 @@ Issue:
 - weight
 - time_estimate
 - relative_position
+- service_desk_reply_to
 - last_edited_at
 - last_edited_by_id
 - discussion_locked
@@ -68,6 +69,7 @@ Note:
 - resolved_by_push
 - discussion_id
 - original_discussion_id
+- review_id
 LabelLink:
 - id
 - label_id
@@ -144,6 +146,8 @@ ProjectMember:
 - invite_accepted_at
 - requested_at
 - expires_at
+- ldap
+- override
 User:
 - id
 - username
@@ -316,6 +320,7 @@ CommitStatus:
 - protected
 - failure_reason
 - scheduled_at
+- upstream_pipeline_id
 Ci::Variable:
 - id
 - project_id
@@ -491,6 +496,17 @@ Project:
 - printing_merge_request_link_enabled
 - resolve_outdated_diff_discussions
 - build_allow_git_fetch
+- merge_requests_template
+- merge_requests_rebase_enabled
+- approvals_before_merge
+- merge_requests_author_approval
+- reset_approvals_on_push
+- disable_overriding_approvers_per_merge_request
+- merge_requests_ff_only_enabled
+- issues_template
+- repository_size_limit
+- sync_time
+- service_desk_enabled
 - last_repository_updated_at
 - ci_config_path
 - delete_error
@@ -498,7 +514,13 @@ Project:
 - merge_requests_rebase_enabled
 - jobs_cache_index
 - external_authorization_classification_label
+- external_webhook_token
 - pages_https_only
+- merge_requests_disable_committers_approval
+- merge_requests_require_code_owner_approval
+- require_password_to_approve
+ProjectTracingSetting:
+- external_url
 Author:
 - name
 ProjectFeature:
@@ -519,12 +541,24 @@ ProtectedBranch::MergeAccessLevel:
 - access_level
 - created_at
 - updated_at
+- user_id
+- group_id
 ProtectedBranch::PushAccessLevel:
 - id
 - protected_branch_id
 - access_level
 - created_at
 - updated_at
+- user_id
+- group_id
+ProtectedBranch::UnprotectAccessLevel:
+- id
+- protected_branch_id
+- access_level
+- created_at
+- updated_at
+- user_id
+- group_id
 ProtectedTag::CreateAccessLevel:
 - id
 - protected_tag_id
@@ -587,6 +621,12 @@ PrometheusMetric:
 - group
 - common
 - identifier
+PrometheusAlert:
+- threshold
+- operator
+- environment_id
+- project_id
+- prometheus_metric_id
 Badge:
 - id
 - link_url
@@ -598,6 +638,20 @@ Badge:
 - type
 ProjectCiCdSetting:
 - group_runners_enabled
+ProtectedEnvironment:
+- id
+- project_id
+- name
+- created_at
+- updated_at
+ProtectedEnvironment::DeployAccessLevel:
+- id
+- protected_environment_id
+- access_level
+- created_at
+- updated_at
+- user_id
+- group_id
 ResourceLabelEvent:
 - id
 - action

spec/migrations/active_record/schema_spec.rb

@@ -5,8 +5,7 @@ require 'spec_helper'
 
 describe ActiveRecord::Schema do
   let(:latest_migration_timestamp) do
-    migrations_paths = %w[db ee/db]
-      .product(%w[migrate post_migrate])
+    migrations_paths = %w[db/migrate db/post_migrate]
       .map { |path| Rails.root.join(*path, '*') }
 
     migrations = Dir[*migrations_paths]

spec/migrations/add_unique_constraint_to_approvals_user_id_and_merge_request_id_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20190404143330_add_unique_constraint_to_approvals_user_id_and_merge_request_id.rb')
+
+describe AddUniqueConstraintToApprovalsUserIdAndMergeRequestId, :migration do
+  let(:migration) { described_class.new }
+  let(:namespaces) { table(:namespaces) }
+  let(:projects) { table(:projects) }
+  let(:merge_requests) { table(:merge_requests) }
+  let(:approvals) { table(:approvals) }
+
+  describe '#up' do
+    before do
+      namespaces.create(id: 1, name: 'ns', path: 'ns')
+      projects.create(id: 1, namespace_id: 1)
+      merge_requests.create(id: 1, target_branch: 'master', source_branch: 'feature-1', target_project_id: 1)
+      merge_requests.create(id: 2, target_branch: 'master', source_branch: 'feature-2', target_project_id: 1)
+    end
+
+    it 'deletes duplicate records and keeps the first one' do
+      first_approval = approvals.create(id: 1, merge_request_id: 1, user_id: 1)
+      approvals.create(id: 2, merge_request_id: 1, user_id: 1)
+
+      migration.up
+
+      expect(approvals.all.to_a).to contain_exactly(first_approval)
+    end
+
+    it 'does not delete unique records' do
+      unique_approvals = [
+        approvals.create(id: 1, merge_request_id: 1, user_id: 1),
+        approvals.create(id: 2, merge_request_id: 1, user_id: 2),
+        approvals.create(id: 3, merge_request_id: 2, user_id: 1)
+      ]
+
+      migration.up
+
+      expect(approvals.all.to_a).to contain_exactly(*unique_approvals)
+    end
+
+    it 'creates unique index' do
+      migration.up
+
+      expect(migration.index_exists?(:approvals, [:user_id, :merge_request_id], unique: true)).to be_truthy
+    end
+  end
+
+  describe '#down' do
+    it 'removes unique index' do
+      migration.up
+      migration.down
+
+      expect(migration.index_exists?(:approvals, [:user_id, :merge_request_id], unique: true)).to be_falsey
+    end
+  end
+end

spec/migrations/clean_up_for_members_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'migrate', '20171216111734_clean_up_for_members.rb')
-
-describe CleanUpForMembers, :migration do
-  before do
-    stub_feature_flags(enforced_sso: false)
-  end
-
-  let(:migration) { described_class.new }
-  let(:groups) { table(:namespaces) }
-  let!(:group_member) { create_group_member }
-  let!(:unbinded_group_member) { create_group_member }
-  let!(:invited_group_member) { create_group_member(true) }
-  let!(:not_valid_group_member) { create_group_member }
-  let!(:project_member) { create_project_member }
-  let!(:invited_project_member) { create_project_member(true) }
-  let!(:unbinded_project_member) { create_project_member }
-  let!(:not_valid_project_member) { create_project_member }
-
-  it 'removes members without proper user_id' do
-    unbinded_group_member.update_column(:user_id, nil)
-    not_valid_group_member.update_column(:user_id, 9999)
-    unbinded_project_member.update_column(:user_id, nil)
-    not_valid_project_member.update_column(:user_id, 9999)
-
-    migrate!
-
-    expect(Member.all).not_to include(unbinded_group_member, not_valid_group_member, unbinded_project_member, not_valid_project_member)
-    expect(Member.all).to include(group_member, invited_group_member, project_member, invited_project_member)
-  end
-
-  def create_group_member(invited = false)
-    fill_member(GroupMember.new(source_id: create_group.id, source_type: 'Namespace'), invited)
-  end
-
-  def create_project_member(invited = false)
-    fill_member(ProjectMember.new(project: create_project), invited)
-  end
-
-  def fill_member(member_object, invited)
-    member_object.tap do |m|
-      m.access_level = 40
-      m.notification_level = 3
-
-      if invited
-        m.user_id = nil
-        m.invite_token = 'xxx'
-        m.invite_email = 'email@email.com'
-      else
-        m.user_id = create_user.id
-      end
-
-      m.save
-    end
-
-    member_object
-  end
-
-  def create_group
-    name = FFaker::Lorem.characters(10)
-
-    groups.create!(type: 'Group', name: name, path: name.downcase.gsub(/\s/, '_'))
-  end
-
-  def create_project
-    name = FFaker::Lorem.characters(10)
-    creator = create_user
-
-    Project.create(name: name,
-                   path: name.downcase.gsub(/\s/, '_'),
-                   namespace: creator.namespace,
-                   creator: creator)
-  end
-
-  def create_user
-    User.create(email: FFaker::Internet.email,
-                password: '12345678',
-                name: FFaker::Name.name,
-                username: FFaker::Internet.user_name,
-                confirmed_at: Time.now,
-                confirmation_token: nil)
-  end
-end

spec/migrations/cleanup_namespaceless_pending_delete_projects_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20170502101023_cleanup_namespaceless_pending_delete_projects.rb')
-
-describe CleanupNamespacelessPendingDeleteProjects, :migration, schema: 20180222043024 do
-  let(:projects) { table(:projects) }
-
-  before do
-    # Stub after_save callbacks that will fail when Project has no namespace
-    allow_any_instance_of(Project).to receive(:ensure_storage_path_exists).and_return(nil)
-    allow_any_instance_of(Project).to receive(:update_project_statistics).and_return(nil)
-  end
-
-  describe '#up' do
-    it 'only cleans up pending delete projects' do
-      projects.create!(name: 'gitlab', path: 'gitlab-org/gitlab-ce', namespace_id: 1)
-      projects.create!(name: 'gitlab', path: 'gitlab-org/gitlab-ee', namespace_id: 2, pending_delete: true)
-      project = Project.new(pending_delete: true, namespace_id: nil)
-      project.save(validate: false)
-
-      expect(NamespacelessProjectDestroyWorker).to receive(:bulk_perform_async).with([[project.id]])
-
-      described_class.new.up
-    end
-
-    it 'does nothing when no pending delete projects without namespace found' do
-      projects.create!(name: 'gitlab', path: 'gitlab-org/gitlab-ce', namespace_id: 1)
-      projects.create!(name: 'gitlab', path: 'gitlab-org/gitlab-ee', namespace_id: 2, pending_delete: true)
-
-      expect(NamespacelessProjectDestroyWorker).not_to receive(:bulk_perform_async)
-
-      described_class.new.up
-    end
-  end
-end

spec/migrations/create_missing_namespace_for_internal_users_spec.rb

@@ -6,37 +6,32 @@ describe CreateMissingNamespaceForInternalUsers, :migration do
   let(:namespaces) { table(:namespaces) }
   let(:routes) { table(:routes) }
 
-  internal_user_types = [:ghost]
-  internal_user_types << :support_bot if ActiveRecord::Base.connection.column_exists?(:users, :support_bot)
-
-  internal_user_types.each do |attr|
-    context "for #{attr} user" do
-      let(:internal_user) do
-        users.create!(email: 'test@example.com', projects_limit: 100, username: 'test', attr => true)
-      end
+  context "for ghost user" do
+    let(:internal_user) do
+      users.create!(email: 'test@example.com', projects_limit: 100, username: 'test', ghost: true)
+    end
 
-      it 'creates the missing namespace' do
-        expect(namespaces.find_by(owner_id: internal_user.id)).to be_nil
+    it 'creates the missing namespace' do
+      expect(namespaces.find_by(owner_id: internal_user.id)).to be_nil
 
-        migrate!
+      migrate!
 
-        namespace = Namespace.find_by(type: nil, owner_id: internal_user.id)
-        route = namespace.route
+      namespace = Namespace.find_by(type: nil, owner_id: internal_user.id)
+      route = namespace.route
 
-        expect(namespace.path).to eq(route.path)
-        expect(namespace.name).to eq(route.name)
-      end
+      expect(namespace.path).to eq(route.path)
+      expect(namespace.name).to eq(route.name)
+    end
 
-      it 'sets notification email' do
-        users.update(internal_user.id, notification_email: nil)
+    it 'sets notification email' do
+      users.update(internal_user.id, notification_email: nil)
 
-        expect(users.find(internal_user.id).notification_email).to be_nil
+      expect(users.find(internal_user.id).notification_email).to be_nil
 
-        migrate!
+      migrate!
 
-        user = users.find(internal_user.id)
-        expect(user.notification_email).to eq(user.email)
-      end
+      user = users.find(internal_user.id)
+      expect(user.notification_email).to eq(user.email)
     end
   end
 end

spec/migrations/delete_inconsistent_internal_id_records_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20180723130817_delete_inconsistent_internal_id_records.rb')
-
-describe DeleteInconsistentInternalIdRecords, :migration do
-  let!(:namespace) { table(:namespaces).create!(name: 'test', path: 'test') }
-  let!(:project1) { table(:projects).create!(namespace_id: namespace.id) }
-  let!(:project2) { table(:projects).create!(namespace_id: namespace.id) }
-  let!(:project3) { table(:projects).create!(namespace_id: namespace.id) }
-
-  let(:internal_ids) { table(:internal_ids) }
-  let(:internal_id_query) { ->(project) { InternalId.where(usage: InternalId.usages[scope.to_s.tableize], project_id: project.id) } }
-
-  let(:create_models) do
-    [project1, project2, project3].each do |project|
-      3.times do |i|
-        attributes = required_attributes.merge(project_id: project.id,
-                                               iid: i.succ)
-
-        table(scope.to_s.pluralize).create!(attributes)
-      end
-    end
-  end
-
-  shared_examples_for 'deleting inconsistent internal_id records' do
-    before do
-      create_models
-
-      [project1, project2, project3].each do |project|
-        internal_ids.create!(project_id: project.id, usage: InternalId.usages[scope.to_s.tableize], last_value: 3)
-      end
-
-      internal_id_query.call(project1).first.tap do |iid|
-        iid.last_value = iid.last_value - 2
-        # This is an inconsistent record
-        iid.save!
-      end
-
-      internal_id_query.call(project3).first.tap do |iid|
-        iid.last_value = iid.last_value + 2
-        # This is a consistent record
-        iid.save!
-      end
-    end
-
-    it "deletes inconsistent records" do
-      expect { migrate! }.to change { internal_id_query.call(project1).size }.from(1).to(0)
-    end
-
-    it "retains consistent records" do
-      expect { migrate! }.not_to change { internal_id_query.call(project2).size }
-    end
-
-    it "retains consistent records, especially those with a greater last_value" do
-      expect { migrate! }.not_to change { internal_id_query.call(project3).size }
-    end
-  end
-
-  context 'for issues' do
-    let(:scope) { :issue }
-    let(:required_attributes) { {} }
-
-    it_behaves_like 'deleting inconsistent internal_id records'
-  end
-
-  context 'for merge_requests' do
-    let(:scope) { :merge_request }
-
-    let(:create_models) do
-      [project1, project2, project3].each do |project|
-        3.times do |i|
-          table(:merge_requests).create!(
-            target_project_id: project.id,
-            source_project_id: project.id,
-            target_branch: 'master',
-            source_branch: j.to_s,
-            iid: i.succ
-          )
-        end
-      end
-    end
-
-    it_behaves_like 'deleting inconsistent internal_id records'
-  end
-
-  context 'for deployments' do
-    let(:scope) { :deployment }
-    let(:deployments) { table(:deployments) }
-
-    let(:create_models) do
-      3.times { |i| deployments.create!(project_id: project1.id, iid: i, environment_id: 1, ref: 'master', sha: 'a', tag: false) }
-      3.times { |i| deployments.create!(project_id: project2.id, iid: i, environment_id: 1, ref: 'master', sha: 'a', tag: false) }
-      3.times { |i| deployments.create!(project_id: project3.id, iid: i, environment_id: 1, ref: 'master', sha: 'a', tag: false) }
-    end
-
-    it_behaves_like 'deleting inconsistent internal_id records'
-  end
-
-  context 'for milestones (by project)' do
-    let(:scope) { :milestone }
-    let(:required_attributes) { { title: 'test' } }
-
-    it_behaves_like 'deleting inconsistent internal_id records'
-  end
-
-  context 'for ci_pipelines' do
-    let(:scope) { :ci_pipeline }
-    let(:required_attributes) { { ref: 'test' } }
-
-    it_behaves_like 'deleting inconsistent internal_id records'
-  end
-
-  context 'for milestones (by group)' do
-    # milestones (by group) is a little different than most of the other models
-    let(:groups) { table(:namespaces) }
-    let(:group1) { groups.create(name: 'Group 1', type: 'Group', path: 'group_1') }
-    let(:group2) { groups.create(name: 'Group 2', type: 'Group', path: 'group_2') }
-    let(:group3) { groups.create(name: 'Group 2', type: 'Group', path: 'group_3') }
-
-    let(:internal_id_query) { ->(group) { InternalId.where(usage: InternalId.usages['milestones'], namespace_id: group.id) } }
-
-    before do
-      [group1, group2, group3].each do |group|
-        3.times do |i|
-          table(:milestones).create!(
-            group_id: group.id,
-            title: 'test',
-            iid: i.succ
-          )
-        end
-
-        internal_ids.create!(namespace_id: group.id, usage: InternalId.usages['milestones'], last_value: 3)
-      end
-
-      internal_id_query.call(group1).first.tap do |iid|
-        iid.last_value = iid.last_value - 2
-        # This is an inconsistent record
-        iid.save!
-      end
-
-      internal_id_query.call(group3).first.tap do |iid|
-        iid.last_value = iid.last_value + 2
-        # This is a consistent record
-        iid.save!
-      end
-    end
-
-    it "deletes inconsistent records" do
-      expect { migrate! }.to change { internal_id_query.call(group1).size }.from(1).to(0)
-    end
-
-    it "retains consistent records" do
-      expect { migrate! }.not_to change { internal_id_query.call(group2).size }
-    end
-
-    it "retains consistent records, especially those with a greater last_value" do
-      expect { migrate! }.not_to change { internal_id_query.call(group3).size }
-    end
-  end
-end

spec/migrations/enqueue_delete_diff_files_workers_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20180619121030_enqueue_delete_diff_files_workers.rb')
-
-describe EnqueueDeleteDiffFilesWorkers, :migration, :sidekiq do
-  it 'correctly schedules diff files deletion schedulers' do
-    Sidekiq::Testing.fake! do
-      expect(BackgroundMigrationWorker)
-        .to receive(:perform_async)
-        .with(described_class::SCHEDULER)
-        .and_call_original
-
-      migrate!
-
-      expect(BackgroundMigrationWorker.jobs.size).to eq(1)
-    end
-  end
-end

spec/migrations/enqueue_redact_links_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20181014121030_enqueue_redact_links.rb')
-
-describe EnqueueRedactLinks, :migration, :sidekiq do
-  let(:merge_requests) { table(:merge_requests) }
-  let(:issues) { table(:issues) }
-  let(:notes) { table(:notes) }
-  let(:projects) { table(:projects) }
-  let(:namespaces) { table(:namespaces) }
-  let(:snippets) { table(:snippets) }
-  let(:users) { table(:users) }
-  let(:user) { users.create!(email: 'test@example.com', projects_limit: 100, username: 'test') }
-
-  before do
-    stub_const("#{described_class.name}::BATCH_SIZE", 1)
-
-    text = 'some text /sent_notifications/00000000000000000000000000000000/unsubscribe more text'
-    group = namespaces.create!(name: 'gitlab', path: 'gitlab')
-    project = projects.create!(namespace_id: group.id)
-
-    merge_requests.create!(id: 1, target_project_id: project.id, source_project_id: project.id, target_branch: 'feature', source_branch: 'master', description: text)
-    issues.create!(id: 1, description: text)
-    notes.create!(id: 1, note: text)
-    notes.create!(id: 2, note: text)
-    snippets.create!(id: 1, description: text, author_id: user.id)
-  end
-
-  it 'correctly schedules background migrations' do
-    Sidekiq::Testing.fake! do
-      Timecop.freeze do
-        migrate!
-
-        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(5.minutes, "Note", "note", 1, 1)
-        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(10.minutes, "Note", "note", 2, 2)
-        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(5.minutes, "Issue", "description", 1, 1)
-        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(5.minutes, "MergeRequest", "description", 1, 1)
-        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(5.minutes, "Snippet", "description", 1, 1)
-        expect(BackgroundMigrationWorker.jobs.size).to eq 5
-      end
-    end
-  end
-end

spec/migrations/migrate_import_attributes_data_from_projects_to_project_mirror_data_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20180502134117_migrate_import_attributes_data_from_projects_to_project_mirror_data.rb')
-
-describe MigrateImportAttributesDataFromProjectsToProjectMirrorData, :sidekiq, :migration do
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:import_state) { table(:project_mirror_data) }
-
-  before do
-    stub_const("#{described_class}::BATCH_SIZE", 1)
-    namespaces.create(id: 1, name: 'gitlab-org', path: 'gitlab-org')
-
-    projects.create!(id: 1, namespace_id: 1, name: 'gitlab1',
-                     path: 'gitlab1', import_error: "foo", import_status: :started,
-                     import_url: generate(:url))
-    projects.create!(id: 2, namespace_id: 1, name: 'gitlab2',
-                     path: 'gitlab2', import_error: "bar", import_status: :failed,
-                     import_url: generate(:url))
-    projects.create!(id: 3, namespace_id: 1, name: 'gitlab3', path: 'gitlab3', import_status: :none, import_url: generate(:url))
-  end
-
-  it 'schedules delayed background migrations in batches in bulk' do
-    Sidekiq::Testing.fake! do
-      Timecop.freeze do
-        expect(projects.where.not(import_status: :none).count).to eq(2)
-
-        subject.up
-
-        expect(BackgroundMigrationWorker.jobs.size).to eq 2
-        expect(described_class::UP_MIGRATION).to be_scheduled_delayed_migration(5.minutes, 1, 1)
-        expect(described_class::UP_MIGRATION).to be_scheduled_delayed_migration(10.minutes, 2, 2)
-      end
-    end
-  end
-
-  describe '#down' do
-    before do
-      import_state.create!(id: 1, project_id: 1, status: :started)
-      import_state.create!(id: 2, project_id: 2, status: :started)
-    end
-
-    it 'schedules delayed background migrations in batches in bulk for rollback' do
-      Sidekiq::Testing.fake! do
-        Timecop.freeze do
-          expect(import_state.where.not(status: :none).count).to eq(2)
-
-          subject.down
-
-          expect(BackgroundMigrationWorker.jobs.size).to eq 2
-          expect(described_class::DOWN_MIGRATION).to be_scheduled_delayed_migration(5.minutes, 1, 1)
-          expect(described_class::DOWN_MIGRATION).to be_scheduled_delayed_migration(10.minutes, 2, 2)
-        end
-      end
-    end
-  end
-end

spec/migrations/migrate_remaining_mr_metrics_populating_background_migration_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20180521162137_migrate_remaining_mr_metrics_populating_background_migration.rb')
-
-describe MigrateRemainingMrMetricsPopulatingBackgroundMigration, :migration, :sidekiq do
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:mrs) { table(:merge_requests) }
-
-  before do
-    namespaces.create!(id: 1, name: 'foo', path: 'foo')
-    projects.create!(id: 123, name: 'gitlab1', path: 'gitlab1', namespace_id: 1)
-    projects.create!(id: 456, name: 'gitlab2', path: 'gitlab2', namespace_id: 1)
-    projects.create!(id: 789, name: 'gitlab3', path: 'gitlab3', namespace_id: 1)
-    mrs.create!(title: 'foo', target_branch: 'target', source_branch: 'source', target_project_id: 123)
-    mrs.create!(title: 'bar', target_branch: 'target', source_branch: 'source', target_project_id: 456)
-    mrs.create!(title: 'kux', target_branch: 'target', source_branch: 'source', target_project_id: 789)
-  end
-
-  it 'correctly schedules background migrations' do
-    stub_const("#{described_class.name}::BATCH_SIZE", 2)
-
-    Sidekiq::Testing.fake! do
-      Timecop.freeze do
-        migrate!
-
-        expect(described_class::MIGRATION)
-          .to be_scheduled_delayed_migration(10.minutes, mrs.first.id, mrs.second.id)
-
-        expect(described_class::MIGRATION)
-          .to be_scheduled_delayed_migration(20.minutes, mrs.third.id, mrs.third.id)
-
-        expect(BackgroundMigrationWorker.jobs.size).to eq(2)
-      end
-    end
-  end
-end

spec/migrations/populate_mr_metrics_with_events_data_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20181204154019_populate_mr_metrics_with_events_data.rb')
-
-describe PopulateMrMetricsWithEventsData, :migration, :sidekiq do
-  let(:namespaces) { table(:namespaces) }
-  let(:projects) { table(:projects) }
-  let(:namespace) { namespaces.create(name: 'gitlab', path: 'gitlab-org') }
-  let(:project) { projects.create(namespace_id: namespace.id, name: 'foo') }
-  let(:merge_requests) { table(:merge_requests) }
-
-  def create_merge_request(id)
-    params = {
-      id: id,
-      target_project_id: project.id,
-      target_branch: 'master',
-      source_project_id: project.id,
-      source_branch: 'mr name',
-      title: "mr name#{id}"
-    }
-
-    merge_requests.create!(params)
-  end
-
-  it 'correctly schedules background migrations' do
-    create_merge_request(1)
-    create_merge_request(2)
-    create_merge_request(3)
-
-    stub_const("#{described_class.name}::BATCH_SIZE", 2)
-
-    Sidekiq::Testing.fake! do
-      Timecop.freeze do
-        migrate!
-
-        expect(described_class::MIGRATION)
-          .to be_scheduled_delayed_migration(8.minutes, 1, 2)
-
-        expect(described_class::MIGRATION)
-          .to be_scheduled_delayed_migration(16.minutes, 3, 3)
-
-        expect(BackgroundMigrationWorker.jobs.size).to eq(2)
-      end
-    end
-  end
-end

spec/migrations/populate_project_statistics_packages_size_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20190418132125_populate_project_statistics_packages_size.rb')
+
+describe PopulateProjectStatisticsPackagesSize, :migration do
+  let(:project_statistics) { table(:project_statistics) }
+  let(:namespaces)         { table(:namespaces) }
+  let(:projects)           { table(:projects) }
+  let(:packages)           { table(:packages_packages) }
+  let(:package_files)      { table(:packages_package_files) }
+
+  let(:file_size)      { 1.kilobyte }
+  let(:repo_size)      { 2.megabytes }
+  let(:lfs_size)       { 3.gigabytes }
+  let(:artifacts_size) { 4.terabytes }
+  let(:storage_size)   { repo_size + lfs_size + artifacts_size }
+
+  let(:namespace)  { namespaces.create(name: 'foo', path: 'foo') }
+  let(:package)    { packages.create!(project_id: project.id, name: 'a package', package_type: 1) }
+  let(:project)    { projects.create!(namespace_id: namespace.id) }
+
+  let!(:statistics) { project_statistics.create!(project_id: project.id, namespace_id: namespace.id, storage_size: storage_size, repository_size: repo_size, lfs_objects_size: lfs_size, build_artifacts_size: artifacts_size) }
+  let!(:package_file) { package_files.create!(package_id: package.id, file: 'a file.txt', file_name: 'a file.txt', size: file_size)}
+
+  it 'backfills ProjectStatistics packages_size' do
+    expect { migrate! }
+      .to change { statistics.reload.packages_size }
+      .from(nil).to(file_size)
+  end
+
+  it 'updates ProjectStatistics storage_size' do
+    expect { migrate! }
+      .to change { statistics.reload.storage_size }
+      .by(file_size)
+  end
+end

spec/migrations/populate_rule_type_on_approval_merge_request_rules_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20190520201748_populate_rule_type_on_approval_merge_request_rules.rb')
+
+describe PopulateRuleTypeOnApprovalMergeRequestRules, :migration do
+  let(:migration) { described_class.new }
+
+  describe '#up' do
+    let(:namespaces) { table(:namespaces) }
+    let(:projects) { table(:projects) }
+    let(:merge_requests) { table(:merge_requests) }
+    let(:approval_rules) { table(:approval_merge_request_rules) }
+
+    # We use integers here since at the time of writing CE does not yet have the
+    # appropriate models and enum definitions.
+    let(:regular_rule_type) { 1 }
+    let(:code_owner_rule_type) { 2 }
+
+    before do
+      namespaces.create!(id: 11, name: 'gitlab', path: 'gitlab')
+      projects.create!(id: 101, namespace_id: 11, name: 'gitlab', path: 'gitlab')
+      merge_requests.create!(id: 1, target_project_id: 101, source_project_id: 101, target_branch: 'feature', source_branch: 'master')
+
+      approval_rules.create!(id: 1, merge_request_id: 1, name: "Default", code_owner: false, rule_type: regular_rule_type)
+      approval_rules.create!(id: 2, merge_request_id: 1, name: "Code Owners", code_owner: true, rule_type: regular_rule_type)
+    end
+
+    it 'backfills ApprovalMergeRequestRules code_owner rule_type' do
+      expect(approval_rules.where(rule_type: regular_rule_type).pluck(:id)).to contain_exactly(1, 2)
+      expect(approval_rules.where(rule_type: code_owner_rule_type).pluck(:id)).to be_empty
+
+      migrate!
+
+      expect(approval_rules.where(rule_type: regular_rule_type).pluck(:id)).to contain_exactly(1)
+      expect(approval_rules.where(rule_type: code_owner_rule_type).pluck(:id)).to contain_exactly(2)
+    end
+  end
+end

spec/migrations/remove_orphaned_label_links_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20180906051323_remove_orphaned_label_links.rb')
-
-describe RemoveOrphanedLabelLinks, :migration do
-  let(:label_links) { table(:label_links) }
-  let(:labels) { table(:labels) }
-
-  let(:project) { create(:project) } # rubocop:disable RSpec/FactoriesInMigrationSpecs
-  let(:label) { create_label }
-
-  before do
-    # This migration was created before we introduced ProjectCiCdSetting#default_git_depth
-    allow_any_instance_of(ProjectCiCdSetting).to receive(:default_git_depth).and_return(nil)
-    allow_any_instance_of(ProjectCiCdSetting).to receive(:default_git_depth=).and_return(0)
-  end
-
-  context 'add foreign key on label_id' do
-    let!(:label_link_with_label) { create_label_link(label_id: label.id) }
-    let!(:label_link_without_label) { create_label_link(label_id: nil) }
-
-    it 'removes orphaned labels without corresponding label' do
-      expect { migrate! }.to change { LabelLink.count }.from(2).to(1)
-    end
-
-    it 'does not remove entries with valid label_id' do
-      expect { migrate! }.not_to change { label_link_with_label.reload }
-    end
-  end
-
-  def create_label(**opts)
-    labels.create!(
-      project_id: project.id,
-      **opts
-    )
-  end
-
-  def create_label_link(**opts)
-    label_links.create!(
-      target_id: 1,
-      target_type: 'Issue',
-      **opts
-    )
-  end
-end

spec/migrations/remove_soft_removed_objects_spec.rb

-require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20171207150343_remove_soft_removed_objects.rb')
-
-describe RemoveSoftRemovedObjects, :migration do
-  describe '#up' do
-    let!(:groups) do
-      table(:namespaces).tap do |t|
-        t.inheritance_column = nil
-      end
-    end
-
-    let!(:routes) do
-      table(:routes).tap do |t|
-        t.inheritance_column = nil
-      end
-    end
-
-    it 'removes various soft removed objects' do
-      5.times do
-        create_with_deleted_at(:issue)
-      end
-
-      regular_issue = create(:issue) # rubocop:disable RSpec/FactoriesInMigrationSpecs
-
-      run_migration
-
-      expect(Issue.count).to eq(1)
-      expect(Issue.first).to eq(regular_issue)
-    end
-
-    it 'removes the temporary indexes once soft removed data has been removed' do
-      migration = described_class.new
-
-      run_migration
-
-      disable_migrations_output do
-        expect(migration.temporary_index_exists?(Issue)).to eq(false)
-      end
-    end
-
-    it 'removes routes of soft removed personal namespaces' do
-      namespace = create_with_deleted_at(:namespace)
-      group = groups.create!(name: 'group', path: 'group_path', type: 'Group')
-      routes.create!(source_id: group.id, source_type: 'Group', name: 'group', path: 'group_path')
-
-      expect(routes.where(source_id: namespace.id).exists?).to eq(true)
-      expect(routes.where(source_id: group.id).exists?).to eq(true)
-
-      run_migration
-
-      expect(routes.where(source_id: namespace.id).exists?).to eq(false)
-      expect(routes.where(source_id: group.id).exists?).to eq(true)
-    end
-
-    it 'schedules the removal of soft removed groups' do
-      group = create_deleted_group
-      admin = create(:user, admin: true) # rubocop:disable RSpec/FactoriesInMigrationSpecs
-
-      expect_any_instance_of(GroupDestroyWorker)
-        .to receive(:perform)
-        .with(group.id, admin.id)
-
-      run_migration
-    end
-
-    it 'does not remove soft removed groups when no admin user could be found' do
-      create_deleted_group
-
-      expect_any_instance_of(GroupDestroyWorker)
-        .not_to receive(:perform)
-
-      run_migration
-    end
-  end
-
-  def run_migration
-    disable_migrations_output do
-      migrate!
-    end
-  end
-
-  def create_with_deleted_at(*args)
-    row = create(*args) # rubocop:disable RSpec/FactoriesInMigrationSpecs
-
-    # We set "deleted_at" this way so we don't run into any column cache issues.
-    row.class.where(id: row.id).update_all(deleted_at: 1.year.ago)
-
-    row
-  end
-
-  def create_deleted_group
-    group = groups.create!(name: 'group', path: 'group_path', type: 'Group')
-    routes.create!(source_id: group.id, source_type: 'Group', name: 'group', path: 'group_path')
-
-    groups.where(id: group.id).update_all(deleted_at: 1.year.ago)
-
-    group
-  end
-end