1 files changed, 31 insertions, 0 deletions
diff --git a/db/post_migrate/20230706011541_add_user_id_foreign_key_to_ml_experiments.rb b/db/post_migrate/20230706011541_add_user_id_foreign_key_to_ml_experiments.rb
new file mode 100644
index 00000000000..77059d89d30
--- /dev/null
+++ b/db/post_migrate/20230706011541_add_user_id_foreign_key_to_ml_experiments.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class AddUserIdForeignKeyToMlExperiments < Gitlab::Database::Migration[2.1]
+  disable_ddl_transaction!
+
+  NEW_FK_NAME = 'fk_ml_experiments_on_user_id'
+  OLD_FK_NAME = 'fk_rails_1fbc5e001f'
+
+  def up
+    add_concurrent_foreign_key(:ml_experiments, :users, column: :user_id, on_delete: :nullify,
+      name: NEW_FK_NAME, validate: true)
+
+    with_lock_retries do
+      remove_foreign_key_if_exists(:ml_experiments, name: OLD_FK_NAME)
+    end
+  end
+
+  def down
+    unless foreign_key_exists?(:ml_experiments, :users, name: OLD_FK_NAME)
+      with_lock_retries do
+        execute(<<~SQL.squish)
+          ALTER TABLE ml_experiments ADD CONSTRAINT #{OLD_FK_NAME} FOREIGN KEY (user_id) REFERENCES users (id)
+        SQL
+      end
+    end
+
+    with_lock_retries do
+      remove_foreign_key_if_exists(:ml_experiments, name: NEW_FK_NAME)
+    end
+  end
+end