Is there a way to query if array field contains a certain value in Doctrine2?

Question

Starting out with Symfony2 + Doctrine.

I have a table with User objects (fos_user), for which my schema contains a roles column of an \'array\' typ

Answer 1

You can simply use LIKE statement described in this manual (yes, even on serialized objects).

I'd suggest you to create an entity class for roles and join it with the user entity by ManyToMany association.