35 lines
1.4 KiB
Ruby
35 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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# rubocop:disable Style/Documentation
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module Gitlab
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module BackgroundMigration
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class ReplaceBlockedByLinks
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class IssueLink < ActiveRecord::Base
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self.table_name = 'issue_links'
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end
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def perform(start_id, stop_id)
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blocked_by_links = IssueLink.where(id: start_id..stop_id).where(link_type: 2)
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ActiveRecord::Base.transaction do
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# There could be two edge cases:
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# 1) issue1 is blocked by issue2 AND issue2 blocks issue1 (type 1)
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# 2) issue1 is blocked by issue2 AND issue2 is related to issue1 (type 0)
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# In both cases cases we couldn't convert blocked by relation to
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# `issue2 blocks issue` because there is already a link with the same
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# source/target id. To avoid these conflicts, we first delete any
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# "opposite" links before we update `blocked by` relation. This
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# should be rare as we have a pre-create check which checks if issues
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# are already linked
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opposite_ids = blocked_by_links
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.select('opposite_links.id')
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.joins('INNER JOIN issue_links as opposite_links ON issue_links.source_id = opposite_links.target_id AND issue_links.target_id = opposite_links.source_id')
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IssueLink.where(id: opposite_ids).delete_all
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blocked_by_links.update_all('source_id=target_id,target_id=source_id,link_type=1')
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end
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end
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end
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end
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end
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