1 files changed, 20 insertions, 0 deletions
diff --git a/db/migrate/20200921131313_add_foreign_key_to_pages_deployment_id_in_project_pages_metadata.rb b/db/migrate/20200921131313_add_foreign_key_to_pages_deployment_id_in_project_pages_metadata.rb
new file mode 100644
index 00000000000..8611f3ab943
--- /dev/null
+++ b/db/migrate/20200921131313_add_foreign_key_to_pages_deployment_id_in_project_pages_metadata.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class AddForeignKeyToPagesDeploymentIdInProjectPagesMetadata < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  INDEX_NAME = 'index_project_pages_metadata_on_pages_deployment_id'
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index(:project_pages_metadata, :pages_deployment_id, name: INDEX_NAME)
+    add_concurrent_foreign_key :project_pages_metadata, :pages_deployments, column: :pages_deployment_id, on_delete: :nullify
+  end
+
+  def down
+    remove_foreign_key_if_exists :project_pages_metadata, column: :pages_deployment_id
+    remove_concurrent_index_by_name(:project_pages_metadata, INDEX_NAME)
+  end
+end