Doctrine 2: how do you use a subquery column (in the SELECT clause)

Question

I\'m trying to do a simple select query with a subquery in the SELECT clause and have simply not found a way to do it. I\'ve tried with both DQL and with the QueryBuilder, n

Answer 1

In my scenario what I needed was to look into a join and find an Id and use it as boolean, found 1 otherwise 0, then applying this to orderBy. DQL expressions worked only when combined with Where clause, which wasn't my case. So, a DQL subselect saved me.

Adapted more or less to your scenario, it would look like this:

// With QueryBuilder
// In AddressRepository
// Where one address may belong to several addressTypes

public function getWithType($addressType){

$qb = $this->createQueryBuilder('a1');
$qb->addSelect('a1.someField', 'a1.otherField')
$qb->addSelect(
        '(SELECT at.addressTypeName 
        FROM App\Entity\Address a2
        JOIN a2.addressType at
        WHERE at.id = '.$addressType.' AND a2.id = a1.id
        ) AS addressTypeName')
//The rest part of the query
        
}