# frozen_string_literal: true class RemoveCiPipelinesMergeTrainsPipelineIdFk < Gitlab::Database::Migration[1.0] disable_ddl_transaction! def up with_lock_retries do execute('LOCK ci_pipelines, merge_trains IN ACCESS EXCLUSIVE MODE') remove_foreign_key_if_exists(:merge_trains, :ci_pipelines, name: "fk_rails_f90820cb08") end end def down add_concurrent_foreign_key(:merge_trains, :ci_pipelines, name: "fk_rails_f90820cb08", column: :pipeline_id, target_column: :id, on_delete: :nullify) end end