php - Symfony2:调用未定义的方法Doctrine\ORM\QueryBuilder::getResult()

带有代码:

$qb = $entityManager->createQueryBuilder();
$qb->select('cat')->from('BuyAndSellSiteBundle:Category ', 'cat');
$qb->getQuery();
$a =$qb->getResult();

我有一个异常(exception):

FatalErrorException: Error: Call to undefined method Doctrine\ORM\QueryBuilder::getResult() in C:\xampp\htdocs\buySell\src\BuyAndSell\SiteBundle\Controller\DefaultController.php line

最佳答案

这是有道理的。因为QueryBuilder本身不会改变，所以您需要存储getQuery()调用的结果:

$queryBuilder = $entityManager->createQueryBuilder();
$queryBuilder->select('cat')->from('BuyAndSellSiteBundle:Category ', 'cat');

// get the Query from the QueryBuilder here ...
$query = $qb->getQuery();

// ... then call getResult() on the Query (not on the QueryBuilder)
$result = $query->getResult();

关于php - Symfony2:调用未定义的方法Doctrine\ORM\QueryBuilder::getResult()，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/21222946/