Is it possible to use result of an SQL function as a field in Doctrine?

Question

Assume I have Product entities and Review entities attached to products. Is it possible to attach a fields to a Product entity based o

Answer 1

Yes, it is possible, you need to use QueryBuilder to achieve that:

$result = $em->getRepository('AppBundle:Product')
    ->createQueryBuilder('p')
    ->select('p, count(r.id) as countResult')
    ->leftJoin('p.Review', 'r')
    ->groupBy('r.id')
    ->getQuery()
    ->getArrayResult();

and now you can do something like:

foreach ($result as $row) {
    echo $row['countResult'];
    echo $row['anyOtherProductField'];
}