41 lines
1.8 KiB
Ruby
41 lines
1.8 KiB
Ruby
#
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# Copyright (C) 2014 - 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 ExtendNotificationPoliciesIndex < ActiveRecord::Migration[4.2]
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tag :postdeploy
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disable_ddl_transaction!
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def up
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NotificationPolicy.select([:communication_channel_id, :notification_id]).
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group(:communication_channel_id, :notification_id).
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having("COUNT(*) > 1").find_each do |policy|
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scope = NotificationPolicy.where(communication_channel_id: policy.communication_channel_id, notification_id: policy.notification_id)
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keeper = scope.order(:created_at).first
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to_delete_scope = scope.where("id<>?", keeper)
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DelayedMessage.where(notification_policy_id: to_delete_scope).update_all(notification_policy_id: keeper.id)
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to_delete_scope.delete_all
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end
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add_index :notification_policies, [:communication_channel_id, :notification_id], unique: true, algorithm: :concurrently, name: 'index_notification_policies_on_cc_and_notification_id'
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remove_index :notification_policies, :communication_channel_id
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end
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def down
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add_index :notification_policies, :communication_channel_id, algorithm: :concurrently
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remove_index :notification_policies, name: 'index_notification_policies_on_cc_and_notification_id'
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end
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end
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