功能学说“不存在”不起作用

时间:2019-05-07 11:39:04

标签: symfony doctrine-query

我尝试选择操作表中不存在的用户。

<?php
namespace App\Repository;

use App\Entity\User;
use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
use Symfony\Bridge\Doctrine\RegistryInterface;

/**
* @method User|null find($id, $lockMode = null, $lockVersion = null)
* @method User|null findOneBy(array $criteria, array $orderBy = null)
* @method User[]    findAll()
* @method User[]    findBy(array $criteria, array $orderBy = null, $limit = null, $offset = null)
*/
class UserRepository extends ServiceEntityRepository
{
   public function __construct(RegistryInterface $registry)
   {
       parent::__construct($registry, User::class);
   }

   /**
    * @return User[] Returns an array of User objects
    */
   public function findByCriteres($reqsearch = null)
   {
       $qb = $this->createQueryBuilder('u');

       //Create subquery
       $sub = $this->createQueryBuilder('a');
       $sub = $sub->innerJoin('a.actions', 'act');

        $qb->andWhere($qb->expr()->not($qb->expr()->exists($sub->getDQL())));

        return $qb->getQuery()->getResult();
   }

通过转储查看结果,我的User实体中有2种情况:

array:2 [▼
  0 => User {#670 ▶}
  1 => User {#3280 ▶}
]

在我的Action实体中只有一个:

array:1 [▼
  0 => User {#3280 ▶}
]

因此,我应该获得以下结果:

array:1 [▼
  0 => User {#670 ▶}
]

但是我只能得到一个空结果:

[]

通过在我的“ getDQL”上进行转储,我得到了对我来说似乎很好的请求(我没有显示任何错误):

"SELECT u FROM App\Entity\User u WHERE NOT(EXISTS(SELECT z FROM App\Entity\User z INNER JOIN z.actions act))"

除了我的成绩,一切都看起来不错!

谢谢您的帮助。

1 个答案:

答案 0 :(得分:1)

您已经忘记将用户u和用户z与他们的ID一起加入。

您的DQL应该是:

SELECT u FROM App\Entity\User u WHERE 
    NOT(
       EXISTS(
           SELECT z FROM App\Entity\User z INNER JOIN z.actions act WHERE u.id = z.id
       )
    )
您的DQL中缺少

WHERE u.id = z.id

因此,您应该在子查询上调用where函数。


   /**
    * @return User[] Returns an array of User objects
    */
   public function findByCriteres($reqsearch = null)
   {
       $qb = $this->createQueryBuilder('u');

       //Create subquery
       $sub = $this->createQueryBuilder('z');
       $sub = $sub->innerJoin('z.actions', 'act')
                  ->where('z.id = u.id');

        $qb->andWhere($qb->expr()->not($qb->expr()->exists($sub->getDQL())));

        return $qb->getQuery()->getResult();
   }