Translation of custom validator in php template - symfony

Question

I do built me a custom constraint validator. The validator is working. But how can I translate the error messages of the CUSTOM validator in a php template? The other validator messages are working, so I do have the translation in app/config/validators.XX.yml.
In my action:
$form = $this->createFormBuilder()
->add('date_id', 'choice', array(
....
'constraints' => array(new CheckChoicesDateId(array('date_ids' => $date_ids))),
....
))
in Bundle/Validator/Constraints
class CheckChoicesDateId extends Constraint
{
public $invalidMessage = '{{ value }}';
public $date_ids;
public function __construct($options = null)
{
parent::__construct($options);
if (null === $this->date_ids ) {
throw new MissingOptionsException('Option date_ids must be given for constraint ' . __CLASS__, array('date_ids'));
}
}
}
in Bundle/Validator/Constraints
class CheckChoicesDateIdValidator extends ConstraintValidator {
public function validate($value, Constraint $constraint) {
if ($value == NULL || !isset($value)) {
$this->context->addViolation($constraint->invalidMessage, array(
'{{ value }}' => 'error.date.0',
//I also tried $this->get('translator')->trans('error.date.0');
// with the error message: Call to undefined method GET
));
}
if (is_numeric($value)) {
$t = array_key_exists($value, $constraint->date_ids);
if ($t == NULL) {
$this->context->addViolation($constraint->invalidMessage, array(
'{{ value }}' => 'error.date.1',
));
}
}
return;
}
}
In my template:
<?php echo $view['form']->errors($form['date_id']) ?>
//I also tried
<?php echo $this->get('translator')->trans($view['form']->errors($form['date_id'])) ?>

Answer 1

I do have a solution, but I guess it is not nice:
In the action I do pass for each possible error a variable.
'constraints' => array(new CheckChoicesDateId(array('date_ids' => $date_ids, 'error_date_0 => $this->get('translator')...., 'error_date_1 => $this->get('translator').... ))),
and in the custom validator I call for each error the right variable with $constraint->error_date_X.
Not nice, but it is working. If anybody has a better solution, feel free to post it!