How to delete an entry with links?

Question

symfony

I actually remove it like this:

$em->remove($area);
 $em->flush();

I have a table with sites and applications

Sites without applications are deleted

Answer 1

I hope the point is clear:

class Application
{
/**
* @ORM\OneToMany(targetEntity="Area", mappedBy="application", cascade={"remove"})
*/
protected $areas;
//...
}

ps although it can also be tricky with connections, if they did it separately