persisting related entities in a form symfony2

Question

I want to ask about the possibility of persisting two entities when submitting a form. Is that possible?

$em = $this->getDoctrine()->getManager();
        $em->persist($a);
        $em->persist($b);
        $em->flush();

knowing that I have commun fields between the two entities. Actually the fields are generated because of the many to one relation between the two entities. Moreover, I will get some fields added to the second entity.

Answer 1

Yes, it's ok to persist two entities, but check first your entities relations, for examples if A has a oneToMany relation with B, You'll then have a addB() method within A entity.

Persisting related entities in this specific use case is as simple as adding cascade={"persist"} on your relation and persist A .

If you've some specific simple logic you want to add to B before saving both A with its B related elements, you can put this logic in addB() so that each time a B element is added to your A entity, you'll get the change (set the right status, date, ...etc) you want.