38 lines
1.5 KiB
Ruby
38 lines
1.5 KiB
Ruby
#
|
|
# Copyright (C) 2020 - present Instructure, Inc.
|
|
#
|
|
# This file is part of Canvas.
|
|
#
|
|
# Canvas is free software: you can redistribute it and/or modify it under
|
|
# the terms of the GNU Affero General Public License as published by the Free
|
|
# Software Foundation, version 3 of the License.
|
|
#
|
|
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
|
|
# details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License along
|
|
# with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
class CleanupInvalidObserverAlerts < ActiveRecord::Migration[5.2]
|
|
tag :postdeploy
|
|
disable_ddl_transaction!
|
|
|
|
def up
|
|
# in production there are not a ton of ObserverAlerts, so doing a sub query
|
|
# for each batch to delete is fine.
|
|
valid_ids = ObserverAlert.where(context_type: 'Submission').
|
|
joins("INNER JOIN #{Submission.quoted_table_name} ON submissions.id=observer_alerts.context_id AND context_type='Submission'").
|
|
select(:context_id)
|
|
scope = ObserverAlert.where(context_type: 'Submission').where.not(context_id: valid_ids)
|
|
# There are not many invalid ObserverAlerts either and this could go in one
|
|
# delete instead of batches, but it will end up being the same.
|
|
until scope.limit(1_000).delete_all < 1_000; end
|
|
end
|
|
|
|
def down
|
|
raise ActiveRecord::IrreversibleMigration
|
|
end
|
|
end
|