Using an Inner Join with QueryBuilder on Symfony2

Question

I want to use an inner Join for my tables auto and rent('s'). Its an 1:N relationship. If I use ->innerJoin('s', 'a') it comes to some errors like this:

[Semantical Error] line 0, col 62 near 'sa, ChrisKfzBuchungBundle:Auto': Error: Class 's' is not defined.

$repo = $this->getDoctrine()->getRepository('ChrisKfzBuchungBundle:Rent');

$qb = $repo->createQueryBuilder('s');
$qb->from('ChrisKfzBuchungBundle:Auto', 'a')
    ->where('s.mieteStart >= :date_from')
    ->andWhere('s.mieteEnde <= :date_to')
    ->setParameter('date_from', $date_from)
    ->setParameter('date_to', $date_to);

How do I join one ore more tables with queryBuilder?

Answer 1

There are methods for that and also for me it just worked with a configured relation between the two entites. Here are two working examples:

left join:

$query = $repo->createQueryBuilder('s')
    ->leftJoin(ChrisKfzBuchungBundle:Auto', 'a', 'WITH', 's.id = a.yourJoinCOlumn')
    ...

inner join:

$query = $repo->createQueryBuilder('s')
    ->select('s, a')
    ->innerJoin('s.yourJoinColumn', 'a')
    ...