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

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...