Subquery on symfony form field - php

Question

I'm trying to generate a subquery to populate and form select in symfony but I get this error message
[Semantical Error] line 0, col 167 near 'd2 WHERE d2.distributor': Error: 'd2' is already defined.
this is my code
-`>add('doctor', EntityType::class, [
'class' => Doctor::class,
'query_builder' => function (EntityRepository $er) use ($options) {
$subquery = $er->createQueryBuilder('d2')
->select('')
->from('AppBundle\Entity\Distributor', 'd2')
->andWhere('d2.distributor = :distributor_subquery')
->setParameter('distributor_subquery', $options['user']);
$query = $er->createQueryBuilder('d');
$query->select('d')
->where('d.distributor = :distributor')
->setParameter('distributor', $options['user'])
->orWhere($query->expr()->in('d.distributor', $subquery->getDQL()))
->orderBy('d.name', 'ASC')
->addOrderBy('d.surname', 'ASC');
return $query;
},`
d2 alias is defined two times
$er->createQueryBuilder('d2')
and
->from('AppBundle\Entity\Distributor', 'd2')
but in both functions the parameter is mandatory
I tried with
$subquery = $er->createQueryBuilder() ->select('') ->from('AppBundle\Entity\Distributor', 'd2') ->andWhere('d2.distributor = :distributor_subquery')
but it doesn't work

Answer 1

Please see the implementation of EntityRepository::createQueryBuilder() method: it already contains the select and from parts, it gets this information from it's entity class. So you can omit calling these methods, just add a where clause and bind params:
$subquery = $er->createQueryBuilder('d2')
->andWhere('d2.distributor = :distributor_subquery')
->setParameter('distributor_subquery', $options['user']);