1 files changed, 17 insertions, 0 deletions
diff --git a/db/migrate/20210729125659_add_foreign_key_to_topic_on_project_topic.rb b/db/migrate/20210729125659_add_foreign_key_to_topic_on_project_topic.rb
new file mode 100644
index 00000000000..1ada08dca1a
--- /dev/null
+++ b/db/migrate/20210729125659_add_foreign_key_to_topic_on_project_topic.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class AddForeignKeyToTopicOnProjectTopic < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key :project_topics, :topics, column: :topic_id, on_delete: :cascade
+  end
+
+  def down
+    with_lock_retries do
+      remove_foreign_key :project_topics, column: :topic_id
+    end
+  end
+end