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# frozen_string_literal: true
module Preloaders
# This class preloads the `project`, `group`, and subscription associations for the given
# labels, user, and project (if provided). A Label can be of type ProjectLabel or GroupLabel
# and the preloader supports both.
#
# Usage:
# labels = Label.where(...)
# Preloaders::LabelsPreloader.new(labels, current_user, @project).preload_all
# labels.first.project # won't fire any query
class LabelsPreloader
attr_reader :labels, :user, :project
def initialize(labels, user, project = nil)
@labels = labels
@user = user
@project = project
end
def preload_all
preloader = ActiveRecord::Associations::Preloader.new
preloader.preload(labels.select { |l| l.is_a? ProjectLabel }, { project: [:project_feature, namespace: :route] })
preloader.preload(labels.select { |l| l.is_a? GroupLabel }, { group: :route })
labels.each do |label|
label.lazy_subscription(user)
label.lazy_subscription(user, project) if project.present?
end
end
end
end
Preloaders::LabelsPreloader.prepend_mod_with('Preloaders::LabelsPreloader')
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