62 lines
2.4 KiB
Ruby
62 lines
2.4 KiB
Ruby
#
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# Copyright (C) 2012 - 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 FixUserMergeConversations < ActiveRecord::Migration[4.2]
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tag :postdeploy
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def self.up
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disable_ddl_transaction!
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# remove any duplicate CP's, possibly fixing private conversation hashes
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# (which may merge it with another conversation)
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ConversationParticipant.find_by_sql(<<-SQL).
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SELECT conversation_participants.*
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FROM #{ConversationParticipant.quoted_table_name}, (
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SELECT MIN(id) AS id, user_id, conversation_id
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FROM #{ConversationParticipant.quoted_table_name}
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GROUP BY user_id, conversation_id
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HAVING COUNT(*) > 1
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ORDER BY conversation_id
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) cps2keep
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WHERE conversation_participants.user_id = cps2keep.user_id
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AND conversation_participants.conversation_id = cps2keep.conversation_id
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AND conversation_participants.id <> cps2keep.id
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SQL
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each do |cp|
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cp.destroy
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cp.conversation.regenerate_private_hash! if cp.private?
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end
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# there may be a bunch more private conversations with the wrong private
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# hash, and there's not a reliable way to figure out which ones those are
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# in sql alone (unless you have a sha1 method for postgres), so
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# we just walk them all out of band and make sure they're right (this may
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# also merge some private conversations in the process)
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Conversation.where("private_hash IS NOT NULL").pluck(:id).each_slice(1000) do |ids|
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Conversation.send_later_if_production_enqueue_args(:batch_regenerate_private_hashes!, {
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:priority => Delayed::LOWER_PRIORITY,
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:max_attempts => 1,
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:strand => "regenerate_conversation_private_hashes"
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}, ids)
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end
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end
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def self.down
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raise ActiveRecord::IrreversibleMigration
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end
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end
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