debian-mirror-gitlab/app/workers/prune_old_events_worker.rb

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class PruneOldEventsWorker
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include ApplicationWorker
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include CronjobQueue
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def perform
# Contribution calendar shows maximum 12 months of events.
# Double nested query is used because MySQL doesn't allow DELETE subqueries
# on the same table.
Event.unscoped.where(
'(id IN (SELECT id FROM (?) ids_to_remove))',
Event.unscoped.where(
'created_at < ?',
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(12.months + 1.day).ago)
.select(:id)
.limit(10_000))
.delete_all
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end
end