Simple recovery password form - forms

Question

again, im trying a simple form for recovery forgot user password.
The form only contains a email input. The form handler, receive the email, search the user, restore your password and send a email with the new password. Is important says that user not is authenticated.
So, i need create a custom constraint that check if the email exists in the db. I have an method of a own service that do it. So, i need bind the method with the constraint.
The custom validation class is:
class ExistEmailValidator extends ConstraintValidator
{
protected $userService;
public function setUserService($userService)
{
echo "Setter...";
var_dump($userService);
die();
$this->userService = $userService;
}
public function validate($value, Constraint $constraint)
{
if($this->userService->existUserEmail($value) == false){
$this->context->addViolation($constraint->message, array('%string%' => $value));
}
}
}
I inject the service from services.yml:
validator.unique.ExistEmailValidator:
class: AppsManantiales\CommonBundle\Validator\Constraints\ExistEmailValidator
tags:
- {name: validator.constraint_validator, alias: user_email_validator}
calls:
- [setUserService, ["userservice"]]
The problem is taht, never inject the service, because Symfony says:
Error: Call to a member function existUserEmail() on a non-object
Note: the user service id is: "userservice".
php app/console container:debug | grep UserService
userservice container AppsManantiales\CommonBundle\Services\UserService
Any ideas ?
UPDATE 1
My constraint class is:
class ExistEmail extends Constraint{
public $message = 'El e-mail "%string%" no pertenece a ningun usuario del sistema.';
public function validatedBy()
{
return get_class($this).'Validator';
}
}
And the form definition is:
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('anUserEmail', 'email',
array(
'constraints' => array(
new ExistEmail()
)
));
}

Answer 1

Replace,
public function validatedBy()
{
return get_class($this).'Validator';
}
in your ExistEmail constraint class by,
public function validatedBy()
{
return 'user_email_validator';
}
in order to map your constraint with the right instance of ExistEmailValidator (The one instantiated in the service container).