Doctrine 2 - How to use discriminator column in where clause

Question

I was used discriminator column in where clause like this:

//f = root entity
$qb = $this->createQueryBuilder(\'f\');
$qb->add(\'where\', \'f.format = \         


        

Answer 1

for PHP 5.50 and above:

$this->createQueryBuilder('f')
        ->andWhere('f INSTANCE OF '.Image::class)