Pass custom parameters to custom ValidationConstraint in Symfony2

Question

I\'m creating a form in Symfony2. The form only contains one book field which allows the user to choose between a list of Books entities. I need to c

Answer 1

Accepted answer did not work for me using Symfony Framework version 2.1. This is how I solved it.

class CustomConstraint extends Constraint
{
    public $dependency;
    public $message = 'The error message.';
}

class CustomConstraintValidator extends ConstraintValidator
{
    public function validate($value, Constraint $constraint)
    {
        if (!$constraint->dependency->allows($value)) {
            $this->context->addViolation($constraint->message);
        }
    }
}

class CustomFormType extends AbstractType
{
    private $dependency;

    public function __construct(Dependency $dependency)
    {
        $this->dependency = $dependency;
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('field', 'type', array(
                'constraints' => array(
                    new CustomConstraint(array('dependency' => $this->dependency))
                )
        ));
    }
}