2018-11-20 20:47:30 +05:30
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# frozen_string_literal: true
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2018-11-08 19:23:39 +05:30
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# Provides a way to work around Rails issue where dependent objects are all
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# loaded into memory before destroyed: https://github.com/rails/rails/issues/22510.
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#
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# This concern allows an ActiveRecord module to destroy all its dependent
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# associations in batches. The idea is borrowed from https://github.com/thisismydesign/batch_dependent_associations.
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#
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# The differences here with that gem:
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#
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# 1. We allow excluding certain associations.
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# 2. We don't need to support delete_all since we can use the EachBatch concern.
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module BatchDestroyDependentAssociations
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extend ActiveSupport::Concern
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DEPENDENT_ASSOCIATIONS_BATCH_SIZE = 1000
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def dependent_associations_to_destroy
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self.class.reflect_on_all_associations(:has_many).select { |assoc| assoc.options[:dependent] == :destroy }
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end
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def destroy_dependent_associations_in_batches(exclude: [])
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dependent_associations_to_destroy.each do |association|
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next if exclude.include?(association.name)
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# rubocop:disable GitlabSecurity/PublicSend
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public_send(association.name).find_each(batch_size: DEPENDENT_ASSOCIATIONS_BATCH_SIZE, &:destroy)
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end
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end
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end
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