php – Doctrine：在调用getRootAlias()错误之前没有设置别名

2023年4月7日 179次阅读

我的原始查询是：

Select * from user u
inner join company c
on u.company_id = c.id 
where u.id=2

我做到了：

$em = $this->get('doctrine')->getEntityManager();
        $qb = $em->createQueryBuilder();

        $qb->select('u')
            ->from('TemplateManager\Bundle\DocumentGeneratorBundle\Entity\User u')
            ->innerjoin('u.company')
            ->where('u.id = ' . $id);
        $query = $qb->getQuery();
        $result = $query->getResult();

我在日志中获得500以下的详细信息：

[2016-09-27 12:06:34] request.INFO: Matched route
“templatemanager_documentgenerator_api_client_find” (parameters:
“_controller”:
“TemplateManager\Bundle\DocumentGeneratorBundle\Controller\API\ClientController::findAction”,
“id”: “2”, “_route”:
“templatemanager_documentgenerator_api_client_find”) [] []

> [2016-09-27 12:06:34] security.DEBUG: Read SecurityContext from the
session [] []

> [2016-09-27 12:06:34] security.DEBUG: Reloading user from user
provider. [] []

> [2016-09-27 12:06:34] security.DEBUG: Username “admin” was reloaded
from user provider. [] []

> [2016-09-27 12:06:34] request.CRITICAL: Uncaught PHP Exception
RuntimeException: “No alias was set before invoking getRootAlias().”
at //myproject//vendor/doctrine/orm/lib/Doctrine/ORM/QueryBuilder.php
line 423 {“exception”:”[object] (RuntimeException(code: 0): No alias
was set before invoking getRootAlias(). at
//myproject//vendor/doctrine/orm/lib/Doctrine/ORM/QueryBuilder.php:423)”}
[]

> [2016-09-27 12:06:34] security.DEBUG: Write SecurityContext in the
session [] []

最佳答案 试试这个

在$em-> createQueryBuilder();上添加别名;

$em->createQueryBuilder('u');

顺便说一下准备你的查询以避免sql注入

$qb->select('u')
  ->from('User', 'u')
  ->where('u.id = ?1')
  ->orderBy('u.name', 'ASC')
  ->setParameter(1, 100);

在我自己的项目中,我试过这个并且效果很好：

$em = $this->get('doctrine')->getEntityManager();

$qb = $em->createQueryBuilder('u');

$qb->select('u')
        ->from('INSIDE\Bundle\AdminBundle\Entity\TAdminUser', 'u')
        ->innerJoin('u.idUser' , 'myalias')
        ->where('u.idAdminUser = 2');

$query = $qb->getQuery();
$result = $query->getResult();

idUser是另一个表不是我们有迁移问题的id 🙂

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