Add devops adoption report configuration models

- Adding Analytics::DevopsAdoption::Segment model
- Analytics::DevopsAdoption::SegmentSelection model

app/models/analytics/devops_adoption.rb

+# frozen_string_literal: true
+module Analytics::DevopsAdoption
+  def self.table_name_prefix
+    'analytics_devops_adoption_'
+  end
+end

app/models/analytics/devops_adoption/segment.rb

+# frozen_string_literal: true
+
+class Analytics::DevopsAdoption::Segment < ApplicationRecord
+  ALLOWED_SEGMENT_COUNT = 20
+
+  has_many :segment_selections
+
+  validates :name, presence: true, uniqueness: true, length: { maximum: 255 }
+  validate :validate_segment_count
+
+  private
+
+  def validate_segment_count
+    if self.class.count >= ALLOWED_SEGMENT_COUNT
+      errors.add(:name, s_('DevopsAdoptionSegment|The maximum number of segments has been reached'))
+    end
+  end
+end

app/models/analytics/devops_adoption/segment_selection.rb

+# frozen_string_literal: true
+
+class Analytics::DevopsAdoption::SegmentSelection < ApplicationRecord
+  ALLOWED_SELECTIONS_PER_SEGMENT = 20
+
+  belongs_to :segment
+  belongs_to :project
+  belongs_to :group
+
+  validates :segment, presence: true
+  validates :project, presence: { unless: :group }
+  validates :project_id, uniqueness: { scope: :segment_id, if: :project }
+  validates :group, presence: { unless: :project }
+  validates :group_id, uniqueness: { scope: :segment_id, if: :group }
+
+  validate :exclusive_project_or_group
+  validate :validate_selection_count
+
+  private
+
+  def exclusive_project_or_group
+    if project.present? && group.present?
+      errors.add(:group, s_('DevopsAdoptionSegmentSelection|The selection cannot be configured for a project and for a group at the same time'))
+    end
+  end
+
+  def validate_selection_count
+    return unless segment
+
+    selection_count_for_segment = self.class.where(segment: segment).count
+
+    if selection_count_for_segment >= ALLOWED_SELECTIONS_PER_SEGMENT
+      errors.add(:segment, s_('DevopsAdoptionSegmentSelection|The maximum number of selections has been reached'))
+    end
+  end
+end

changelogs/unreleased/262395-models-for-devops-adoption-segments.yml

+---
+title: Add `analytics_devops_adoption_segment_selections` and `analytics_devops_adoption_segments` database tables.
+merge_request: 45748
+author:
+type: other

db/migrate/20201021085007_create_analytics_devops_adoption_segments.rb

+# frozen_string_literal: true
+
+class CreateAnalyticsDevopsAdoptionSegments < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    create_table :analytics_devops_adoption_segments, if_not_exists: true do |t|
+      t.text :name, null: false, index: { unique: true }
+      t.datetime_with_timezone :last_recorded_at
+
+      t.timestamps_with_timezone
+    end
+
+    add_text_limit :analytics_devops_adoption_segments, :name, 255
+  end
+
+  def down
+    drop_table :analytics_devops_adoption_segments
+  end
+end

db/migrate/20201021102554_create_analytics_devops_adoption_segment_selections.rb

+# frozen_string_literal: true
+
+class CreateAnalyticsDevopsAdoptionSegmentSelections < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    create_table :analytics_devops_adoption_segment_selections do |t|
+      t.references :segment, index: { name: 'index_on_segment_selections_segment_id' }, null: false, foreign_key: { to_table: :analytics_devops_adoption_segments, on_delete: :cascade }
+      t.bigint :group_id
+      t.bigint :project_id
+      t.index [:group_id, :segment_id], unique: true, name: 'index_on_segment_selections_group_id_segment_id'
+      t.index [:project_id, :segment_id], unique: true, name: 'index_on_segment_selections_project_id_segment_id'
+
+      t.timestamps_with_timezone
+    end
+  end
+end

db/migrate/20201021105347_add_foreign_key_project_id_to_segment_selection.rb

+# frozen_string_literal: true
+
+class AddForeignKeyProjectIdToSegmentSelection < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key(:analytics_devops_adoption_segment_selections, :projects, column: :project_id, on_delete: :cascade)
+  end
+
+  def down
+    with_lock_retries do
+      remove_foreign_key :analytics_devops_adoption_segment_selections, column: :project_id
+    end
+  end
+end

db/migrate/20201021105600_add_foreign_key_group_id_to_segment_selection.rb

+# frozen_string_literal: true
+
+class AddForeignKeyGroupIdToSegmentSelection < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key(:analytics_devops_adoption_segment_selections, :namespaces, column: :group_id, on_delete: :cascade)
+  end
+
+  def down
+    with_lock_retries do
+      remove_foreign_key :analytics_devops_adoption_segment_selections, column: :group_id
+    end
+  end
+end

db/migrate/20201021105959_add_check_constraint_to_segment_selection.rb

+# frozen_string_literal: true
+
+class AddCheckConstraintToSegmentSelection < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  CONSTRAINT_NAME = 'segment_selection_project_id_or_group_id_required'
+
+  def up
+    add_check_constraint :analytics_devops_adoption_segment_selections, '(project_id != NULL AND group_id IS NULL) OR (group_id != NULL AND project_id IS NULL)', CONSTRAINT_NAME
+  end
+
+  def down
+    remove_check_constraint :analytics_devops_adoption_segment_selections, CONSTRAINT_NAME
+  end
+end

db/schema_migrations/20201021085007

+552f8a042bdecb7511d63e129438faff3fde8e1086cc88f7a79269b2b7098a65
\ No newline at end of file

db/schema_migrations/20201021102554

+90936786a9c2a9d035d13be87021b2f8278342cd11992d58753ca5a5413ed9d7
\ No newline at end of file

db/schema_migrations/20201021105347

+d7683f7a2db6aa27606756c158fa029c932230713b165917bc05a491f10e7adf
\ No newline at end of file

db/schema_migrations/20201021105600

+9b90dd436cc1c315eacc60acbc5f6b3b94029b82b4fcb27a41abc4941ad9a4ad
\ No newline at end of file

db/schema_migrations/20201021105959

+d924e4ad9ff67d01d660db3b3a1b9e5d74cecb1a127d598d1d1193cbfa499030
\ No newline at end of file

db/structure.sql

@@ -8953,6 +8953,42 @@ CREATE SEQUENCE analytics_cycle_analytics_project_stages_id_seq
 
 ALTER SEQUENCE analytics_cycle_analytics_project_stages_id_seq OWNED BY analytics_cycle_analytics_project_stages.id;
 
+CREATE TABLE analytics_devops_adoption_segment_selections (
+    id bigint NOT NULL,
+    segment_id bigint NOT NULL,
+    group_id bigint,
+    project_id bigint,
+    created_at timestamp with time zone NOT NULL,
+    updated_at timestamp with time zone NOT NULL,
+    CONSTRAINT segment_selection_project_id_or_group_id_required CHECK ((((project_id <> NULL::bigint) AND (group_id IS NULL)) OR ((group_id <> NULL::bigint) AND (project_id IS NULL))))
+);
+
+CREATE SEQUENCE analytics_devops_adoption_segment_selections_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+ALTER SEQUENCE analytics_devops_adoption_segment_selections_id_seq OWNED BY analytics_devops_adoption_segment_selections.id;
+
+CREATE TABLE analytics_devops_adoption_segments (
+    id bigint NOT NULL,
+    name text NOT NULL,
+    last_recorded_at timestamp with time zone,
+    created_at timestamp with time zone NOT NULL,
+    updated_at timestamp with time zone NOT NULL
+);
+
+CREATE SEQUENCE analytics_devops_adoption_segments_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+ALTER SEQUENCE analytics_devops_adoption_segments_id_seq OWNED BY analytics_devops_adoption_segments.id;
+
 CREATE TABLE analytics_instance_statistics_measurements (
     id bigint NOT NULL,
     count bigint NOT NULL,
@@ -17471,6 +17507,10 @@ ALTER TABLE ONLY analytics_cycle_analytics_group_value_streams ALTER COLUMN id S
 
 ALTER TABLE ONLY analytics_cycle_analytics_project_stages ALTER COLUMN id SET DEFAULT nextval('analytics_cycle_analytics_project_stages_id_seq'::regclass);
 
+ALTER TABLE ONLY analytics_devops_adoption_segment_selections ALTER COLUMN id SET DEFAULT nextval('analytics_devops_adoption_segment_selections_id_seq'::regclass);
+
+ALTER TABLE ONLY analytics_devops_adoption_segments ALTER COLUMN id SET DEFAULT nextval('analytics_devops_adoption_segments_id_seq'::regclass);
+
 ALTER TABLE ONLY analytics_instance_statistics_measurements ALTER COLUMN id SET DEFAULT nextval('analytics_instance_statistics_measurements_id_seq'::regclass);
 
 ALTER TABLE ONLY appearances ALTER COLUMN id SET DEFAULT nextval('appearances_id_seq'::regclass);
@@ -18422,6 +18462,12 @@ ALTER TABLE ONLY analytics_cycle_analytics_group_value_streams
 ALTER TABLE ONLY analytics_cycle_analytics_project_stages
     ADD CONSTRAINT analytics_cycle_analytics_project_stages_pkey PRIMARY KEY (id);
 
+ALTER TABLE ONLY analytics_devops_adoption_segment_selections
+    ADD CONSTRAINT analytics_devops_adoption_segment_selections_pkey PRIMARY KEY (id);
+
+ALTER TABLE ONLY analytics_devops_adoption_segments
+    ADD CONSTRAINT analytics_devops_adoption_segments_pkey PRIMARY KEY (id);
+
 ALTER TABLE ONLY analytics_instance_statistics_measurements
     ADD CONSTRAINT analytics_instance_statistics_measurements_pkey PRIMARY KEY (id);
 
@@ -19960,6 +20006,8 @@ CREATE INDEX index_analytics_ca_project_stages_on_start_event_label_id ON analyt
 
 CREATE INDEX index_analytics_cycle_analytics_group_stages_custom_only ON analytics_cycle_analytics_group_stages USING btree (id) WHERE (custom = true);
 
+CREATE UNIQUE INDEX index_analytics_devops_adoption_segments_on_name ON analytics_devops_adoption_segments USING btree (name);
+
 CREATE INDEX index_application_settings_on_custom_project_templates_group_id ON application_settings USING btree (custom_project_templates_group_id);
 
 CREATE INDEX index_application_settings_on_file_template_project_id ON application_settings USING btree (file_template_project_id);
@@ -21202,6 +21250,12 @@ CREATE UNIQUE INDEX index_on_instance_statistics_recorded_at_and_identifier ON a
 
 CREATE INDEX index_on_label_links_all_columns ON label_links USING btree (target_id, label_id, target_type);
 
+CREATE UNIQUE INDEX index_on_segment_selections_group_id_segment_id ON analytics_devops_adoption_segment_selections USING btree (group_id, segment_id);
+
+CREATE UNIQUE INDEX index_on_segment_selections_project_id_segment_id ON analytics_devops_adoption_segment_selections USING btree (project_id, segment_id);
+
+CREATE INDEX index_on_segment_selections_segment_id ON analytics_devops_adoption_segment_selections USING btree (segment_id);
+
 CREATE INDEX index_on_users_name_lower ON users USING btree (lower((name)::text));
 
 CREATE INDEX index_open_project_tracker_data_on_service_id ON open_project_tracker_data USING btree (service_id);
@@ -22980,6 +23034,9 @@ ALTER TABLE ONLY project_group_links
 ALTER TABLE ONLY epics
     ADD CONSTRAINT fk_dccd3f98fc FOREIGN KEY (assignee_id) REFERENCES users(id) ON DELETE SET NULL;
 
+ALTER TABLE ONLY analytics_devops_adoption_segment_selections
+    ADD CONSTRAINT fk_ded7fe0344 FOREIGN KEY (group_id) REFERENCES namespaces(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY issues
     ADD CONSTRAINT fk_df75a7c8b8 FOREIGN KEY (promoted_to_epic_id) REFERENCES epics(id) ON DELETE SET NULL;
 
@@ -23043,6 +23100,9 @@ ALTER TABLE ONLY clusters
 ALTER TABLE ONLY epics
     ADD CONSTRAINT fk_f081aa4489 FOREIGN KEY (group_id) REFERENCES namespaces(id) ON DELETE CASCADE;
 
+ALTER TABLE ONLY analytics_devops_adoption_segment_selections
+    ADD CONSTRAINT fk_f1472b95f3 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY boards
     ADD CONSTRAINT fk_f15266b5f9 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
 
@@ -23112,6 +23172,9 @@ ALTER TABLE ONLY ip_restrictions
 ALTER TABLE ONLY terraform_state_versions
     ADD CONSTRAINT fk_rails_04f176e239 FOREIGN KEY (terraform_state_id) REFERENCES terraform_states(id) ON DELETE CASCADE;
 
+ALTER TABLE ONLY analytics_devops_adoption_segment_selections
+    ADD CONSTRAINT fk_rails_053f00a9da FOREIGN KEY (segment_id) REFERENCES analytics_devops_adoption_segments(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY ci_build_report_results
     ADD CONSTRAINT fk_rails_056d298d48 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
 

locale/gitlab.pot

@@ -9283,6 +9283,15 @@ msgstr ""
 msgid "DevOps Score"
 msgstr ""
 
+msgid "DevopsAdoptionSegmentSelection|The maximum number of selections has been reached"
+msgstr ""
+
+msgid "DevopsAdoptionSegmentSelection|The selection cannot be configured for a project and for a group at the same time"
+msgstr ""
+
+msgid "DevopsAdoptionSegment|The maximum number of segments has been reached"
+msgstr ""
+
 msgid "DevopsAdoption|Add a segment to get started"
 msgstr ""
 

spec/factories/analytics/devops_adoption/segment_selections.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :devops_adoption_segment_selection, class: 'Analytics::DevopsAdoption::SegmentSelection' do
+    association :segment, factory: :devops_adoption_segment
+    project
+
+    trait :project do
+      group { nil }
+      project
+    end
+
+    trait :group do
+      project { nil }
+      group
+    end
+  end
+end

spec/factories/analytics/devops_adoption/segments.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :devops_adoption_segment, class: 'Analytics::DevopsAdoption::Segment' do
+    sequence(:name) { |n| "Segment #{n}" }
+  end
+end

spec/models/analytics/devops_adoption/segment_selection_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Analytics::DevopsAdoption::SegmentSelection, type: :model do
+  subject { build(:devops_adoption_segment_selection, :project) }
+
+  describe 'validation' do
+    let_it_be(:group) { create(:group) }
+    let_it_be(:project) { create(:project) }
+
+    it { is_expected.to validate_presence_of(:segment) }
+
+    context do
+      subject { create(:devops_adoption_segment_selection, :project, project: project) }
+
+      it { is_expected.to validate_uniqueness_of(:project_id).scoped_to(:segment_id) }
+    end
+
+    context do
+      subject { create(:devops_adoption_segment_selection, :group, group: group) }
+
+      it { is_expected.to validate_uniqueness_of(:group_id).scoped_to(:segment_id) }
+    end
+
+    it 'project is required' do
+      selection = build(:devops_adoption_segment_selection, project: nil, group: nil)
+
+      selection.validate
+
+      expect(selection.errors).to have_key(:project)
+    end
+
+    it 'project is not required when a group is given' do
+      selection = build(:devops_adoption_segment_selection, :group, group: group)
+
+      expect(selection).to be_valid
+    end
+
+    it 'does not allow group to be set when project is present' do
+      selection = build(:devops_adoption_segment_selection)
+
+      selection.group = group
+      selection.project = project
+
+      selection.validate
+
+      expect(selection.errors[:group]).to eq([s_('DevopsAdoptionSegmentSelection|The selection cannot be configured for a project and for a group at the same time')])
+    end
+
+    context 'limit the number of segment selections' do
+      let_it_be(:segment) { create(:devops_adoption_segment) }
+
+      subject { build(:devops_adoption_segment_selection, segment: segment, project: project) }
+
+      before do
+        create(:devops_adoption_segment_selection, :project, segment: segment)
+
+        stub_const("#{described_class}::ALLOWED_SELECTIONS_PER_SEGMENT", 1)
+      end
+
+      it 'shows validation error' do
+        subject.validate
+
+        expect(subject.errors[:segment]).to eq([s_('DevopsAdoptionSegment|The maximum number of selections has been reached')])
+      end
+    end
+  end
+end

spec/models/analytics/devops_adoption/segment_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Analytics::DevopsAdoption::Segment, type: :model do
+  subject { build(:devops_adoption_segment) }
+
+  describe 'validation' do
+    it { is_expected.to validate_presence_of(:name) }
+    it { is_expected.to validate_uniqueness_of(:name) }
+    it { is_expected.to validate_length_of(:name).is_at_most(255) }
+
+    context 'limit the number of segments' do
+      subject { build(:devops_adoption_segment) }
+
+      before do
+        create_list(:devops_adoption_segment, 2)
+
+        stub_const("#{described_class}::ALLOWED_SEGMENT_COUNT", 2)
+      end
+
+      it 'shows validation error' do
+        subject.validate
+
+        expect(subject.errors[:name]).to eq([s_('DevopsAdoptionSegment|The maximum number of segments has been reached')])
+      end
+    end
+  end
+end