validation - Symfony validator with Doctrine query -

i'm writing forgotten password form and, using php validation (as opposed yml), trying first of check whether e-mail address exists.

i think i'm there can't seem run doctrine query inside validator. here have far:

class emailexistsvalidator extends constraintvalidator {      public function isvalid($value, constraint $constraint)     {         $em = $this->container->get('doctrine.orm.entity_manager');         $query = $em->createquery('select count(id) users email=:email')             ->setparameter('email', $value);         $count = $query->getquery()->getsinglescalarresult();          if ($count != 1) {             $this->setmessage($constraint->message);              return false;         }          return true;     } } 

i "undefined property - container".

just pass doctrine service validator this:

protected $doctrine;      public function __construct($doctrine) {         $this->doctrine = $doctrine;     } 

and in services.yml:

my_service.my_constraint:         class: mycompany\mybundlebundle\validator\constraints\myvalidator         arguments:             - '@doctrine'         tags:             - { name: validator.constraint_validator, alias: my_name } 

and can in validator like: $this->doctrine->getrepository('...');