debian-mirror-gitlab/app/models/concerns/update_project_statistics.rb

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# frozen_string_literal: true
# This module is providing helpers for updating `ProjectStatistics` with `after_save` and `before_destroy` hooks.
#
# It deals with `ProjectStatistics.increment_statistic` making sure not to update statistics on a cascade delete from the
# project, and keeping track of value deltas on each save. It updates the DB only when a change is needed.
#
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# Example:
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#
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# module Ci
# class JobArtifact < ApplicationRecord
# include UpdateProjectStatistics
#
# update_project_statistics project_statistics_name: :build_artifacts_size
# end
# end
#
# Expectation:
#
# - `statistic_attribute` must be an ActiveRecord attribute
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# - The model must implement `project` and `project_id`. i.e. direct Project relationship or delegation
module UpdateProjectStatistics
extend ActiveSupport::Concern
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include AfterCommitQueue
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class_methods do
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attr_reader :project_statistics_name, :statistic_attribute
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# Configure the model to update `project_statistics_name` on ProjectStatistics,
# when `statistic_attribute` changes
#
# - project_statistics_name: A column of `ProjectStatistics` to update
# - statistic_attribute: An attribute of the current model, default to `size`
def update_project_statistics(project_statistics_name:, statistic_attribute: :size)
@project_statistics_name = project_statistics_name
@statistic_attribute = statistic_attribute
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after_save(:update_project_statistics_after_save, if: :update_project_statistics_after_save?)
after_destroy(:update_project_statistics_after_destroy, if: :update_project_statistics_after_destroy?)
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end
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private :update_project_statistics
end
included do
private
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def update_project_statistics_after_save?
update_project_statistics_attribute_changed?
end
def update_project_statistics_after_destroy?
!project_destroyed?
end
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def update_project_statistics_after_save
attr = self.class.statistic_attribute
delta = read_attribute(attr).to_i - attribute_before_last_save(attr).to_i
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schedule_update_project_statistic(delta)
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end
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def update_project_statistics_attribute_changed?
saved_change_to_attribute?(self.class.statistic_attribute)
end
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def update_project_statistics_after_destroy
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delta = -read_attribute(self.class.statistic_attribute).to_i
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schedule_update_project_statistic(delta)
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end
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def project_destroyed?
project.pending_delete?
end
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def schedule_update_project_statistic(delta)
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return if delta == 0
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return if project.nil?
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increment = Gitlab::Counters::Increment.new(amount: delta, ref: id)
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run_after_commit do
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ProjectStatistics.increment_statistic(project, self.class.project_statistics_name, increment)
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end
end
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end
end