symfony - 如何计算 DQL 查询返回的行数？

Question

我想计算从 DQL 查询返回的行数，我该怎么做？这是我的 DQL 查询：

$items=$em->createQuery("select i.unitPrice,i.quantity,i.linetotal,i.description from InvoicesInvoicesBundle:Invoiceshasitems i where i.invoiceid='".$id."'");
$itemdata=$items->getResult();

Answer 1

Use Count()

$items=$em->createQuery("select COUNT(i.unitPrice)
                         from InvoicesInvoicesBundle:Invoiceshasitems i
                          where i.invoiceid='".$id."'");
    $itemdata=$items->getResult();

http://docs.doctrine-project.org/en/2.1/reference/dql-doctrine-query-language.html

you should bookmark the above link if you are working regularly on DQL.

Answer 2

试试这个代码

 $qbTotal = $this->em->createQueryBuilder();
 $qbTotal->select('count(i)')
            ->from('InvoicesInvoicesBundle:Invoiceshasitems', 'i')
            ->where('i.invoiceid = :id')
            ->setParameter('id', $id)
             ;

 $qeuryTotal = $qbTotal->getQuery();
 $totalItems = $qeuryTotal->getSingleScalarResult();

Answer 3

好吧，@Praveesh 有答案，尽管其中有一个轻微的错字。应该是：id 而不是 ?id。

但是这个链接为我赢得了 680 次重复，所以我很确定它是正确的：Count Rows in Doctrine QueryBuilder