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

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, neither work. The code follows, please don't say I could just use a join, this is a simplified example just to illustrate the problem, I have legitimate use cases for subqueries.
// With QueryBuilder
$query = $qb->select(array('a',
'(SELECT at.addresstypeName
FROM e:Addresstype at
WHERE at.addresstypeId = a.addresstypeId
) AS addresstypeName'))
->from('e:Address', 'a')
->where('a.addressId = :addressId')
->setParameter('addressId', 1);
// With DQL
$dql = "SELECT a,
(SELECT at.addresstypeName
FROM e:Addresstype at
WHERE at.addresstypeId = a.addresstypeId
) AS addresstypeName
FROM e:Address a
WHERE a.addressId = :addressId";
$query = $em->createQuery($dql)->setParameter(':addressId', 1);
The following relationship is defined on the Address table:
/**
* #ORM\ManyToOne(targetEntity="Addresstype")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="addresstype_id", referencedColumnName="addresstype_id")
* })
*/
protected $addresstype;
In native SQL, the query would look like this:
SELECT
a.*,
(
SELECT at.addresstype_name
FROM addresstype at
WHERE at.addresstype_id = a.addresstype_id
) AS addresstype_name
FROM address a
WHERE a.address_id = 1
Any ideas?

Answer 1

$query = $qb->select('a')
->addSelect('(SELECT at.addresstypeName
FROM e:Addresstype at
WHERE at.addresstypeId = a.addresstypeId) AS addresstypeName'
)
->from('e:Address', 'a')
->where('a.addressId = :addressId')
->setParameter('addressId', 1);

Answer 2

For me subquery with doctrine works with this query :
$qb->select('e.field')
->addSelect('(SELECT count(mv.nm)
FROM Clt\Bundle\MyBundle\Entity\MV mv
LEFT JOIN Clt\Bundle\MyBundle\Entity\M ma WITH mv.nm=ma.nm
WHERE mv.ne=e.ne and ma.nm is null
) AS nm'
)
->from($this->_entityName, 'e')
->leftJoin('e.m', 'm')
->where($qb->expr()->eq('t.id'.$typeModule, $idElementModule));
Note that in the left join you must use WITH instead of ON...

Answer 3

I know this is an old question, but if you want, you could have used another query builder as your subquery:
$qb->select("a")
->addSelect("(" . $qb2->select("at.addresstypeName")
->from("e:Addresstype", "at")
->where("at.addresstypeId = a.addresstypeId")
->getDQL() . ") AS addresstypeName"
)
->from('e:Address', 'a')
->where('a.addressId = :addressId')
->setParameter('addressId', 1);

Answer 4

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
}