private function readMultValues(Meta $m, int $id): array
    {
        $data = [];
        $read = new Read();
        $read->exeRead(PRE . $this->entity . "_" . $m->getColumn(), "WHERE {$this->entity}_id = :id", "id={$id}");
        if ($read->getResult()) {
            foreach ($read->getResult() as $item)
                $data[] = $item[$m->getRelation() . "_id"];
        }
        return $data;
    }