add_preloaded_record_to_collection

# File activerecord/lib/active_record/association_preload.rb, line 52
      def add_preloaded_record_to_collection(parent_records, reflection_name, associated_record)
        parent_records.each do |parent_record|
          association_proxy = parent_record.send(reflection_name)
          association_proxy.loaded
          association_proxy.target = associated_record
        end
      end