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# frozen_string_literal: true
# rubocop:disable Style/Documentation
module Gitlab
module BackgroundMigration
class ReplaceBlockedByLinks
class IssueLink < ActiveRecord::Base
self.table_name = 'issue_links'
end
def perform(start_id, stop_id)
blocked_by_links = IssueLink.where(id: start_id..stop_id).where(link_type: 2)
ActiveRecord::Base.transaction do
# if there is duplicit bi-directional relation (issue2 is blocked by issue1
# and issue1 already links issue2), then we can just delete 'blocked by'.
# This should be rare as we have a pre-create check which checks if issues are
# already linked
blocked_by_links
.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')
.where('opposite_links.link_type': 1)
.delete_all
blocked_by_links.update_all('source_id=target_id,target_id=source_id,link_type=1')
end
end
end
end
end
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