Question

$qb = $this->doctrine->em->createQueryBuilder()                
            ->from('User','u')
            ->select('count(u.name)')
            ->where('u.name = :name')
            ->setParameter('name', $user->getUsername());

当我执行$qb->getQuery()->getResult()时，我收到这个错误：

致命错误：未捕获异常'Doctrine \ ORM \ Query \ QueryException'，并在/ var / www / darkfrog / application / libraries /中显示消息'SELECT count（u.name）FROM User u WHERE u.name =：name' Doctrine / ORM / Query / QueryException.php：39Stack trace：

#0 /var/www/darkfrog/application/libraries/Doctrine/ORM/Query/Parser.php(429）：Doctrine \ ORM \ Query \ QueryException :: dqlError（'SELECT count（u .. ..'）

#1 /var/www/darkfrog/application/libraries/Doctrine/ORM/Query/Parser.php(854）：Doctrine \ ORM \ Query \ Parser-＆gt; semanticalError（'Class'User'is ......'，数组）

#2 /var/www/darkfrog/application/libraries/Doctrine/ORM/Query/Parser.php(1529）：Doctrine \ ORM \ Query \ Parser-＆gt; AbstractSchemaName（）

#3 /var/www/darkfrog/application/libraries/Doctrine/ORM/Query/Parser.php(1426）：Doctrine \ ORM \ Query \ Parser-＆gt; RangeVariableDeclaration（）

#4 /var/www/darkfrog/application/libraries/Doctrine/ORM/Query/Parser.php(1168）：Doctrine \ ORM \ Query \ Parser-＆gt; IdentificationVariableDeclaration（）

#5 /var/www/darkfrog/application/libraries/Doctrine/ORM/Query/Parser.php(757):/ var / www / darkfrog / application / libraries中的Doctrine \ ORM \ Query \ Pars第49行的/Doctrine/ORM/Query/QueryException.php

Answer 1

以下代码效果很好，只需在。

子句中添加“实体”即可

$qb = $this->doctrine->em->createQueryBuilder()
            ->select($this->doctrine->em->createQueryBuilder()->expr()->count('u.username'))
            ->from('Entities\User','u')
            ->where('u.username = :username')
            ->setParameter('username', $user->getUsername());
var_dump($qb->getQuery()->getResult());

Answer 2

$qb->$this->doctrine->em->createQueryBuilder()
    ->select($qb->expr()->count('u.name'))
    ->from('User','u')
    ->where('u.name = :name')
    ->setParameter('name', $user->getUsername());

Answer 3

您可以使用User :: class定义实体名称。

$qb = $this->doctrine->em->createQueryBuilder()                
            ->from(User::class,'u')
            ->select('count(u.name)')
            ->where('u.name = :name')
            ->setParameter('name', $user->getUsername());

Doctrine QueryBuilder：未捕获的异常

3 个答案: