-class TrashableGroups < ActiveRecord::Migration
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class TrashableGroups < ActiveRecord::Migration[4.2]
def up
add_column :groups, :trash_at, :datetime
add_index(:groups, :trash_at)