如何在ORM Symfony2中使用createQueryBuilder选择特定列？

Question

我正在使用createQueryBuilder在Symfony2中构建查询.但是,我不想在这个实体中占用所有列.如何只选择ID和名称？

$query = $this->getEntityManager()->createQueryBuilder();
        $query
            ->select('d')
            ->from('AcmeBundle:Demo', 'd')
            ->leftjoin('d.otherEntity', 'o');

        $query->setMaxResults(10);
        $results = $query->getQuery()->getResult();

非常感谢,

Answer 1

试试以下,

$fields = array('d.id', 'd.name', 'o.id');
//$fields = 'partial d.{id, name}, partial o.{id}';  //if you want to get entity object

$query = $this->getEntityManager()->createQueryBuilder();
        $query
            ->select($fields)
            ->from('AcmeBundle:Demo', 'd')
            ->leftjoin('d.otherEntity', 'o');

        $query->setMaxResults(10);
        $results = $query->getQuery()->getResult();