How to JOIN without a relationship in Doctrine?

Question

I have an entity Log (table log) with members resourceType and resourceId (with columns resource_log and

Answer 1

The JOIN without relationship can be implemented like this:

$queryBuilder = $this->entityManager->createQueryBuilder();
$queryBuilder->select('l')->from(Log::class, 'l');
$queryBuilder->join(
    Order::class,
    'o',
    \Doctrine\ORM\Query\Expr\Join::WITH,
    'o.id = l.resourceId'
);
...
$queryBuilder
    ->where('o.myOrderProperty = :myOrderProperty')
    ->setParameter('myOrderProperty', $myOrderProperty);

The only problem is, that the joined entities are not added to the main entity, so that $myLog->getOrder(...) returns null.