Jarves\Storage\AbstractStorage::getParentId PHP 메소드

    public function getParentId($pk)
    {
        $object = $this->getParent($pk);
        if (!$object) {
            return null;
        }
        $result = array();
        foreach ($this->primaryKeys as $key) {
            $result[] = $object[$key];
        }
        return $result;
    }