Symfony2 Doctrine Expr'不是NULL'

I'm using the FormType for an Entity of mine, and setting up an entity field. I need two Where clauses in an And, and from what I've read on the Query Builder page, this is at least how I should go about it:

我正在使用FormType作为我的实体，并设置实体字段。我在And中需要两个Where子句，而且从我在Query Builder页面上看到的内容来看，这至少是我应该如何去做的：

'query_builder' => function ($er){
    $qb = $er->createQueryBuilder('p');
    $qb
        ->where($qb->expr()->andx(
            $qb->expr()->in('p', '?1'),
            $qb->expr()->not(
                $qb->expr()->eq('p.location', 'NULL')
            )
        ))
        ->setParameter(1, $this->totalScope)
    ;
    return $qb;
},

However, the not(eq('col', 'NULL')) doesn't achieve the desired result(and in fact, errors with "Error: Expected Literal, got 'NULL'"

但是，not（eq（'col'，'NULL'））没有达到预期的结果（事实上，错误“错误：预期文字，得到'NULL'”

2 个解决方案

#1

You can use isNotNull:

你可以使用isNotNull：

'query_builder' => function ($er){
    $qb = $er->createQueryBuilder('p');
    $qb
        ->where($qb->expr()->andx(
            $qb->expr()->in('p', '?1'),
            $qb->expr()->isNotNull('p.location')
        ))
        ->setParameter(1, $this->totalScope);

    return $qb;
},

#2

You can also use DQL in your queryBuilder, which is much less ugly IMO.

你也可以在queryBuilder中使用DQL，这不是那么难看的IMO。

Quick and dirty example from a controller:

来自控制器的快速而肮脏的示例：

$repo = $this->getDoctrine()->getRepository('AcmeBundle:Transaction');
$query = $repo->createQueryBuilder('t')
    ->where('t.timestamp > :timestamp')
    ->andWhere('t.pinNumber IS NOT NULL')
    ->setParameter('timestamp', new \DateTime('1 day ago'))
    ->getQuery()
;

Easier to read in my estimation.

我估计更容易阅读。

#1