1 files changed, 22 insertions, 0 deletions
diff --git a/db/migrate/20200827060932_add_user_foreign_key_to_merge_request_reviewers.rb b/db/migrate/20200827060932_add_user_foreign_key_to_merge_request_reviewers.rb
new file mode 100644
index 00000000000..d6c6985a668
--- /dev/null
+++ b/db/migrate/20200827060932_add_user_foreign_key_to_merge_request_reviewers.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+# See https://docs.gitlab.com/ee/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddUserForeignKeyToMergeRequestReviewers < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      add_foreign_key :merge_request_reviewers, :users, column: :user_id, on_delete: :cascade # rubocop:disable Migration/AddConcurrentForeignKey
+    end
+  end
+
+  def down
+    with_lock_retries do
+      remove_foreign_key :merge_request_reviewers, column: :user_id
+    end
+  end
+end