How to perform a join query using Symfony and Doctrine Query Builder

Question

I have two entities which are connected through a 1:1 relationship, e.g: MyEntity.idRelatedEntity I want to create a Doctrine query where I can retrieve data from MyEntity depending on a value from a certain column in RelatedEntity. Something like this (it doesn't work of course):

$entity = $em
    ->getRepository('MyBundle:RelatedEntity')
    ->createQueryBuilder('e')
    ->leftJoin('MyBundle:RelatedEntity', 'r')
    ->where('r.foo = 1')
    ->getQuery()
    ->getResult();

Any help would be much appreciated :)

Answer 1

$entity = $em
    ->getRepository('MyBundle:MyEntity')
    ->createQueryBuilder('e')
    ->join('e.idRelatedEntity', 'r')
    ->where('r.foo = 1')
    ->getQuery()
    ->getResult();

Also left join makes no sense here (because of where clause that will make it work like inner join)