Symfony2: How call the repository of an entity in the FormType

Question

I tried to call the repository of my entity Category in the class form of my entity BonCommande, but this error ocuured:

Notice:

Answer 1

From your code I assume you are missing this:

//Somewhere at the begging of your BonCommandeType
protected $em;
...
public function __construct(EntityManager $em) 
{
    $this->em = $em;
}

Keep in mind that when you create a new form object you should use smth like :

BonCommandeType($this->getDoctrine()->getManager()) // if inside a controller