16 lines
769 B
Ruby
16 lines
769 B
Ruby
class Cron::PurgeUnattachedBlobsJob < Cron::CronJob
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self.schedule_expression = "every day at midnight"
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def perform
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# .in_batches { _1.each... } is more efficient in this case that in_batches.each_record or find_each
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# because it plucks only ids in a preliminary query, then load records with selected columns in batches by ids.
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# This is faster than other batch strategies, which load at once selected columns with an ORDER BY in the same query, triggering timeouts.
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ActiveStorage::Blob.unattached.select(:id, :service_name, :created_at).in_batches do |relation|
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relation.each do |blob|
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return if blob.created_at > 24.hours.ago # not in where() because it's not an indexed column
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blob.purge_later
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end
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end
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end
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end
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