Symfony2 Doctrine Expr 'IS NOT NULL'

Question

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:

'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'

Answer 1

You can use 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;
},