Doctrine 2如何在不调用实体构造函数的情况下检索实体？

use Doctrine\ORM\Query\ResultSetMapping;

$rsm = new ResultSetMapping();
$rsm->addEntityResult('YourEntity', 'e');
$rsm->addFieldResult('e', 'id', 'id');
$rsm->addFieldResult('e', 'name', 'name');

$query = $this->_em->createNativeQuery('SELECT e.id, e.name FROM your_entity e WHERE e.id = ?', $rsm);
$query->setParameter(1, $id);
$result = $query->getArrayResult();

use Doctrine\ORM\Query\ResultSetMapping;

$rsm = new ResultSetMapping();
$rsm->addScalarResult('id', 'id');
$rsm->addScalarResult('name', 'name');

$query = $this->_em->createNativeQuery('SELECT e.id, e.name FROM your_entity e WHERE e.id = ?', $rsm);
$query->setParameter(1, $id);
$result = $query->getScalarResult();