48 lines
2.1 KiB
Ruby
48 lines
2.1 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 FixDuplicateCommunicationChannels < ActiveRecord::Migration[4.2]
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tag :postdeploy
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disable_ddl_transaction!
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def self.up
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CommunicationChannel.
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group(CommunicationChannel.by_path_condition(CommunicationChannel.arel_table[:path]), :path_type, :user_id).
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select([CommunicationChannel.by_path_condition(CommunicationChannel.arel_table[:path]).as('path'), :path_type, :user_id]).
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having("COUNT(*) > 1").find_each do |baddie|
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all = CommunicationChannel.where(user_id: baddie.user_id, path_type: baddie.path_type).
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by_path(baddie.path).order("CASE workflow_state WHEN 'active' THEN 0 WHEN 'unconfirmed' THEN 1 ELSE 2 END", :created_at).to_a
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keeper = all.shift
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DelayedMessage.where(communication_channel_id: all).delete_all
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# it has a dependent: :destroy, but that does them one by one, which could take forever
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NotificationPolicy.where(communication_channel_id: all).delete_all
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all.each(&:destroy_permanently!)
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end
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if connection.adapter_name == 'PostgreSQL'
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concurrently = " CONCURRENTLY" if connection.open_transactions == 0
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execute("CREATE UNIQUE INDEX#{concurrently} index_communication_channels_on_user_id_and_path_and_path_type ON #{CommunicationChannel.quoted_table_name} (user_id, LOWER(path), path_type)")
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else
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add_index :communication_channels, [:user_id, :path, :path_type], unique: true
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end
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end
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def self.down
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remove_index :communication_channels, [:user_id, :path, :path_type]
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end
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end
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