51 lines
1.2 KiB
Ruby
51 lines
1.2 KiB
Ruby
# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/
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# https://github.com/telent/ar-as-batches
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# TODO: Should be reconsidered with rails 6.1 because then
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# find_each might be able to handle order as well
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# e.g. Ticket::Priority.order(updated: :desc).find_each... is not possbile atm with find_each
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module ActiveRecord
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module AsBatches
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class Batch
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def initialize(arel, args)
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@offset = arel.offset || 0
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@limit = arel.limit
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@size = args[:size] || 100
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return if !@limit || (@limit > @size)
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@size = @limit
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end
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def get_records(query)
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query.offset(@offset).limit(@size).all
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end
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def as_batches(query, &blk)
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records = get_records(query)
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while records.any?
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@offset += records.size
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records.each(&blk)
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if @limit
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@limit -= records.size
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if @limit < size
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@size = @limit
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end
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return if @limit.zero?
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end
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records = get_records(query)
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end
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end
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end
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def as_batches(args = {}, &blk)
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Batch.new(arel, args).as_batches(self, &blk)
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end
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end
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class Relation
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include AsBatches
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end
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end
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