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