Add sprints table and barebones model

Migrations to create a Sprints table with all the necessary attributes -
foreign keys/etc to come in following commits

app/models/group.rb

@@ -31,6 +31,7 @@ class Group < Namespace
   has_many :members_and_requesters, as: :source, class_name: 'GroupMember'
 
   has_many :milestones
+  has_many :sprints
   has_many :shared_group_links, foreign_key: :shared_with_group_id, class_name: 'GroupGroupLink'
   has_many :shared_with_group_links, foreign_key: :shared_group_id, class_name: 'GroupGroupLink'
   has_many :shared_groups, through: :shared_group_links, source: :shared_group

app/models/project.rb

@@ -208,6 +208,7 @@ class Project < ApplicationRecord
   has_many :services
   has_many :events
   has_many :milestones
+  has_many :sprints
   has_many :notes
   has_many :snippets, class_name: 'ProjectSnippet'
   has_many :hooks, class_name: 'ProjectHook'

app/models/sprint.rb

+# frozen_string_literal: true
+
+class Sprint < ApplicationRecord
+  belongs_to :project
+  belongs_to :group
+end

changelogs/unreleased/205570-sprint_initial_migrations.yml

+---
+title: Create Sprints table and barebones model
+merge_request: 30125
+author:
+type: added

db/migrate/20200213224220_add_sprints.rb

+# frozen_string_literal: true
+
+class AddSprints < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    create_table :sprints, id: :bigserial do |t|
+      t.timestamps_with_timezone null: false
+      t.date :start_date
+      t.date :due_date
+
+      t.references :project, foreign_key: false, index: false
+      t.references :group, foreign_key: false, index: true
+
+      t.integer :iid, null: false
+      t.integer :cached_markdown_version
+      t.integer :state, limit: 2
+      # rubocop:disable Migration/AddLimitToTextColumns
+      t.text :title, null: false
+      t.text :title_html
+      t.text :description
+      t.text :description_html
+      # rubocop:enable Migration/AddLimitToTextColumns
+
+      t.index :description, name: "index_sprints_on_description_trigram", opclass: :gin_trgm_ops, using: :gin
+      t.index :due_date
+      t.index %w(project_id iid), unique: true
+      t.index :title
+      t.index :title, name: "index_sprints_on_title_trigram", opclass: :gin_trgm_ops, using: :gin
+
+      t.index %w(project_id title), unique: true, where: 'project_id IS NOT NULL'
+      t.index %w(group_id title), unique: true, where: 'group_id IS NOT NULL'
+    end
+  end
+end

db/migrate/20200420172113_add_text_limit_to_sprints_title.rb

+# frozen_string_literal: true
+
+class AddTextLimitToSprintsTitle < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  CONSTRAINT_NAME = 'sprints_title'
+
+  def up
+    add_text_limit :sprints, :title, 255, constraint_name: CONSTRAINT_NAME
+  end
+
+  def down
+    remove_check_constraint :sprints, CONSTRAINT_NAME
+  end
+end

db/migrate/20200420172752_add_sprints_foreign_key_to_projects.rb

+# frozen_string_literal: true
+
+class AddSprintsForeignKeyToProjects < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key :sprints, :projects, column: :project_id, on_delete: :cascade
+  end
+
+  def down
+    with_lock_retries do # rubocop:disable Migration/WithLockRetriesWithoutDdlTransaction
+      remove_foreign_key :sprints, column: :project_id
+    end
+  end
+end

db/migrate/20200420172927_add_sprints_foreign_key_to_groups.rb

+# frozen_string_literal: true
+
+class AddSprintsForeignKeyToGroups < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key :sprints, :namespaces, column: :group_id, on_delete: :cascade
+  end
+
+  def down
+    with_lock_retries do # rubocop:disable Migration/WithLockRetriesWithoutDdlTransaction
+      remove_foreign_key :sprints, column: :group_id
+    end
+  end
+end

db/structure.sql

@@ -6055,6 +6055,33 @@ CREATE SEQUENCE public.spam_logs_id_seq
 
 ALTER SEQUENCE public.spam_logs_id_seq OWNED BY public.spam_logs.id;
 
+CREATE TABLE public.sprints (
+    id bigint NOT NULL,
+    created_at timestamp with time zone NOT NULL,
+    updated_at timestamp with time zone NOT NULL,
+    start_date date,
+    due_date date,
+    project_id bigint,
+    group_id bigint,
+    iid integer NOT NULL,
+    cached_markdown_version integer,
+    state smallint,
+    title text NOT NULL,
+    title_html text,
+    description text,
+    description_html text,
+    CONSTRAINT sprints_title CHECK ((char_length(title) <= 255))
+);
+
+CREATE SEQUENCE public.sprints_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+ALTER SEQUENCE public.sprints_id_seq OWNED BY public.sprints.id;
+
 CREATE TABLE public.status_page_settings (
     project_id bigint NOT NULL,
     created_at timestamp with time zone NOT NULL,
@@ -7570,6 +7597,8 @@ ALTER TABLE ONLY public.software_licenses ALTER COLUMN id SET DEFAULT nextval('p
 
 ALTER TABLE ONLY public.spam_logs ALTER COLUMN id SET DEFAULT nextval('public.spam_logs_id_seq'::regclass);
 
+ALTER TABLE ONLY public.sprints ALTER COLUMN id SET DEFAULT nextval('public.sprints_id_seq'::regclass);
+
 ALTER TABLE ONLY public.status_page_settings ALTER COLUMN project_id SET DEFAULT nextval('public.status_page_settings_project_id_seq'::regclass);
 
 ALTER TABLE ONLY public.subscriptions ALTER COLUMN id SET DEFAULT nextval('public.subscriptions_id_seq'::regclass);
@@ -8493,6 +8522,9 @@ ALTER TABLE ONLY public.software_licenses
 ALTER TABLE ONLY public.spam_logs
     ADD CONSTRAINT spam_logs_pkey PRIMARY KEY (id);
 
+ALTER TABLE ONLY public.sprints
+    ADD CONSTRAINT sprints_pkey PRIMARY KEY (id);
+
 ALTER TABLE ONLY public.status_page_settings
     ADD CONSTRAINT status_page_settings_pkey PRIMARY KEY (project_id);
 
@@ -10299,6 +10331,22 @@ CREATE INDEX index_software_licenses_on_spdx_identifier ON public.software_licen
 
 CREATE UNIQUE INDEX index_software_licenses_on_unique_name ON public.software_licenses USING btree (name);
 
+CREATE INDEX index_sprints_on_description_trigram ON public.sprints USING gin (description public.gin_trgm_ops);
+
+CREATE INDEX index_sprints_on_due_date ON public.sprints USING btree (due_date);
+
+CREATE INDEX index_sprints_on_group_id ON public.sprints USING btree (group_id);
+
+CREATE UNIQUE INDEX index_sprints_on_group_id_and_title ON public.sprints USING btree (group_id, title) WHERE (group_id IS NOT NULL);
+
+CREATE UNIQUE INDEX index_sprints_on_project_id_and_iid ON public.sprints USING btree (project_id, iid);
+
+CREATE UNIQUE INDEX index_sprints_on_project_id_and_title ON public.sprints USING btree (project_id, title) WHERE (project_id IS NOT NULL);
+
+CREATE INDEX index_sprints_on_title ON public.sprints USING btree (title);
+
+CREATE INDEX index_sprints_on_title_trigram ON public.sprints USING gin (title public.gin_trgm_ops);
+
 CREATE INDEX index_status_page_settings_on_project_id ON public.status_page_settings USING btree (project_id);
 
 CREATE INDEX index_subscriptions_on_project_id ON public.subscriptions USING btree (project_id);
@@ -10864,6 +10912,9 @@ ALTER TABLE ONLY public.labels
 ALTER TABLE ONLY public.merge_request_metrics
     ADD CONSTRAINT fk_7f28d925f3 FOREIGN KEY (merged_by_id) REFERENCES public.users(id) ON DELETE SET NULL;
 
+ALTER TABLE ONLY public.sprints
+    ADD CONSTRAINT fk_80aa8a1f95 FOREIGN KEY (group_id) REFERENCES public.namespaces(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY public.import_export_uploads
     ADD CONSTRAINT fk_83319d9721 FOREIGN KEY (group_id) REFERENCES public.namespaces(id) ON DELETE CASCADE;
 
@@ -11101,6 +11152,9 @@ ALTER TABLE ONLY public.namespaces
 ALTER TABLE ONLY public.fork_networks
     ADD CONSTRAINT fk_e7b436b2b5 FOREIGN KEY (root_project_id) REFERENCES public.projects(id) ON DELETE SET NULL;
 
+ALTER TABLE ONLY public.sprints
+    ADD CONSTRAINT fk_e8206c9686 FOREIGN KEY (project_id) REFERENCES public.projects(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY public.application_settings
     ADD CONSTRAINT fk_e8a145f3a7 FOREIGN KEY (instance_administrators_group_id) REFERENCES public.namespaces(id) ON DELETE SET NULL;
 
@@ -13109,6 +13163,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200213204737
 20200213220159
 20200213220211
+20200213224220
 20200214025454
 20200214034836
 20200214085940
@@ -13318,6 +13373,9 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200416120128
 20200416120354
 20200417044453
+20200420172113
+20200420172752
+20200420172927
 20200421233150
 \.
 

spec/lib/gitlab/import_export/all_models.yml

@@ -344,6 +344,7 @@ project:
 - labels
 - events
 - milestones
+- sprints
 - notes
 - snippets
 - hooks