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# 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
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