36 lines
1 KiB
Ruby
36 lines
1 KiB
Ruby
# frozen_string_literal: true
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class MigrateMergeRequestMentionsToDb < ActiveRecord::Migration[5.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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DELAY = 3.minutes.to_i
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BATCH_SIZE = 1_000
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MIGRATION = 'UserMentions::CreateResourceUserMention'
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JOIN = "LEFT JOIN merge_request_user_mentions on merge_requests.id = merge_request_user_mentions.merge_request_id"
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QUERY_CONDITIONS = "(description like '%@%' OR title like '%@%') AND merge_request_user_mentions.merge_request_id IS NULL"
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disable_ddl_transaction!
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class MergeRequest < ActiveRecord::Base
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include EachBatch
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self.table_name = 'merge_requests'
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end
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def up
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MergeRequest
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.joins(JOIN)
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.where(QUERY_CONDITIONS)
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.each_batch(of: BATCH_SIZE) do |batch, index|
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range = batch.pluck(Arel.sql('MIN(merge_requests.id)'), Arel.sql('MAX(merge_requests.id)')).first
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migrate_in(index * DELAY, MIGRATION, ['MergeRequest', JOIN, QUERY_CONDITIONS, false, *range])
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end
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end
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def down
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# no-op
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end
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end
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