Swap FK ci_subscriptions_projects to projects for LFK

Swaps FK for ci_subscriptions_projects.upstream_project_id to projects

Changelog: changed

db/post_migrate/20220124184338_remove_projects_ci_subscriptions_projects_upstream_project_id_fk.rb

+# frozen_string_literal: true
+
+class RemoveProjectsCiSubscriptionsProjectsUpstreamProjectIdFk < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    return unless foreign_key_exists?(:ci_subscriptions_projects, :projects, name: "fk_rails_7871f9a97b")
+
+    with_lock_retries do
+      execute('LOCK projects, ci_subscriptions_projects IN ACCESS EXCLUSIVE MODE') if transaction_open?
+
+      remove_foreign_key_if_exists(:ci_subscriptions_projects, :projects, name: "fk_rails_7871f9a97b")
+    end
+  end
+
+  def down
+    add_concurrent_foreign_key(:ci_subscriptions_projects, :projects, name: "fk_rails_7871f9a97b", column: :upstream_project_id, target_column: :id, on_delete: :cascade)
+  end
+end

db/schema_migrations/20220124184338

+ae696157794bcbe3ebd0dc41d7b3fe4dc61982ad4a96fa503fd7857e0d3dab16
\ No newline at end of file

db/structure.sql

@@ -30755,9 +30755,6 @@ ALTER TABLE ONLY boards_epic_user_preferences
 ALTER TABLE ONLY packages_debian_group_distribution_keys
     ADD CONSTRAINT fk_rails_779438f163 FOREIGN KEY (distribution_id) REFERENCES packages_debian_group_distributions(id) ON DELETE CASCADE;
 
-ALTER TABLE ONLY ci_subscriptions_projects
-    ADD CONSTRAINT fk_rails_7871f9a97b FOREIGN KEY (upstream_project_id) REFERENCES projects(id) ON DELETE CASCADE;
-
 ALTER TABLE ONLY terraform_states
     ADD CONSTRAINT fk_rails_78f54ca485 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
 

ee/spec/models/ci/subscriptions/project_spec.rb

@@ -33,4 +33,11 @@ RSpec.describe Ci::Subscriptions::Project do
       let!(:model) { create(:ci_subscriptions_project, downstream_project: parent) }
     end
   end
+
+  context 'loose foreign key on ci_subscriptions_projects.upstream_project_id' do
+    it_behaves_like 'cleanup by a loose foreign key' do
+      let!(:parent) { create(:project, :public) }
+      let!(:model) { create(:ci_subscriptions_project, upstream_project: parent) }
+    end
+  end
 end

lib/gitlab/database/gitlab_loose_foreign_keys.yml

@@ -172,6 +172,9 @@ ci_subscriptions_projects:
   - table: projects
     column: downstream_project_id
     on_delete: async_delete
+  - table: projects
+    column: upstream_project_id
+    on_delete: async_delete
 security_scans:
   - table: ci_builds
     column: build_id

spec/lib/gitlab/database/no_cross_db_foreign_keys_spec.rb

@@ -32,7 +32,6 @@ RSpec.describe 'cross-database foreign keys' do
       ci_running_builds.project_id
       ci_sources_projects.source_project_id
       ci_stages.project_id
-      ci_subscriptions_projects.upstream_project_id
       ci_unit_tests.project_id
       dast_site_profiles_pipelines.ci_pipeline_id
       vulnerability_feedback.pipeline_id