Merge branch 'zj-requeue-pending-delete' into 'master'

Requeue projects pending deletion

See merge request !8438

changelogs/unreleased/zj-requeue-pending-delete.yml

+---
+title: Requeue pending deletion projects
+merge_request:
+author:

db/post_migrate/20170104150317_requeue_pending_delete_projects.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RequeuePendingDeleteProjects < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    admin = User.find_by(admin: true)
+    return unless admin
+
+    @offset = 0
+
+    loop do
+      ids = pending_delete_batch
+
+      break if ids.rows.count.zero?
+
+      args = ids.map { |id| [id['id'], admin.id, {}] }
+
+      Sidekiq::Client.push_bulk('class' => "ProjectDestroyWorker", 'args' => args)
+
+      @offset += 1
+    end
+  end
+
+  def down
+    # noop
+  end
+
+  private
+
+  def pending_delete_batch
+    connection.exec_query(find_batch)
+  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].not_eq(nil)).
+      skip(@offset * BATCH_SIZE).
+      take(BATCH_SIZE).
+      to_sql
+  end
+end