Swap FK ci_pipeline_artifacts to projects for LFK

Removes FK for ci_pipeline_artifacts to projects

Changelog: changed

db/post_migrate/20220119141736_remove_projects_ci_pipeline_artifacts_project_id_fk.rb

+# frozen_string_literal: true
+
+class RemoveProjectsCiPipelineArtifactsProjectIdFk < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    with_lock_retries do
+      execute('LOCK projects, ci_pipeline_artifacts IN ACCESS EXCLUSIVE MODE')
+
+      remove_foreign_key_if_exists(:ci_pipeline_artifacts, :projects, name: "fk_rails_4a70390ca6")
+    end
+  end
+
+  def down
+    add_concurrent_foreign_key(:ci_pipeline_artifacts, :projects, name: "fk_rails_4a70390ca6", column: :project_id, target_column: :id, on_delete: :cascade)
+  end
+end

db/schema_migrations/20220119141736

+faa30b386af9adf3e9f54a0e8e2880310490e4dc1378eae68b346872d0bb8bfd
\ No newline at end of file

db/structure.sql

@@ -30465,9 +30465,6 @@ ALTER TABLE ONLY user_custom_attributes
 ALTER TABLE ONLY upcoming_reconciliations
     ADD CONSTRAINT fk_rails_497b4938ac FOREIGN KEY (namespace_id) REFERENCES namespaces(id) ON DELETE CASCADE;
 
-ALTER TABLE ONLY ci_pipeline_artifacts
-    ADD CONSTRAINT fk_rails_4a70390ca6 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
-
 ALTER TABLE ONLY ci_job_token_project_scope_links
     ADD CONSTRAINT fk_rails_4b2ee3290b FOREIGN KEY (source_project_id) REFERENCES projects(id) ON DELETE CASCADE;
 

lib/gitlab/database/gitlab_loose_foreign_keys.yml

@@ -150,3 +150,7 @@ ci_secure_files:
   - table: projects
     column: project_id
     on_delete: async_delete
+ci_pipeline_artifacts:
+  - table: projects
+    column: project_id
+    on_delete: async_delete

spec/lib/gitlab/database/no_cross_db_foreign_keys_spec.rb

@@ -23,7 +23,6 @@ RSpec.describe 'cross-database foreign keys' do
       ci_job_token_project_scope_links.target_project_id
       ci_pending_builds.namespace_id
       ci_pending_builds.project_id
-      ci_pipeline_artifacts.project_id
       ci_pipeline_schedules.owner_id
       ci_pipeline_schedules.project_id
       ci_pipelines.merge_request_id

spec/models/ci/pipeline_artifact_spec.rb

@@ -215,4 +215,11 @@ RSpec.describe Ci::PipelineArtifact, type: :model do
       end
     end
   end
+
+  context 'loose foreign key on ci_pipeline_artifacts.project_id' do
+    it_behaves_like 'cleanup by a loose foreign key' do
+      let!(:parent) { create(:project) }
+      let!(:model) { create(:ci_pipeline_artifact, project: parent) }
+    end
+  end
 end