run

# File activerecord/lib/active_record/associations/preloader/association.rb, line 18
        def run(preloader)
          records = load_records do |record|
            owner = owners_by_key[convert_key(record[association_key_name])]
            association = owner.association(reflection.name)
            association.set_inverse_instance(record)
          end

          owners.each do |owner|
            associate_records_to_owner(owner, records[convert_key(owner[owner_key_name])] || [])
          end
        end