Symfony Inject Entity Manager to Custom Validator

Question

In my symfony application i need a custom validation constraint, which should check if an email is unique. This Constraint should be used as an annotation.

I followed the guideline from the symfony cookbooks, but i get exception:

Attempted to load class "unique.email.validator" from the global namespace. Did you forget a "use" statement?

This is the code i have in my Unique Email Constraint class:

<?php

namespace MyApp\AppBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

/**
* Class UniqueEmail
* @package MyApp\AppBundle\Validator\Constraints
* @Annotation
*/
class UniqueEmail extends Constraint
{
  public $message = 'The Email already exists.';

  public function validatedBy()
  {
      return 'unique.email.validator';
  }
}

And this is the code from my unique EmailValidator:

namespace MyApp\AppBundle\Validator\Constraints;

use Doctrine\ORM\EntityManager;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class UniqueEmailValidator extends ConstraintValidator
{
   /**
    * @var EntityManager
    */
   protected $em;

   public function __construct(EntityManager $entityManager)
   {
      $this->em = $entityManager;
   }

  public function validate($value, Constraint $constraint)
  {
      $repository = $this->em->getRepository('AppBundle:Advertiser');
      $advertiser = $repository->findOneBy(array(
          'email' => $value
      ));

      if ($advertiser) {
          $this->context->buildViolation($constraint->message)
              ->addViolation();
      }
  }
}

And last but not least my services.yml:

   services:
       unique.email.validator:
           class: MyApp\AppBundle\Validator\Constraints\UniqueEmailValidator
           arguments:
               entityManager: "@doctrine.orm.entity_manager"
           tags:
               - { name: validator.constraint_validator, alias:      unqiue.email.validator }

Does anyone have any idead how to solve it?

Use "app/console container:debug unique.email.validator" to verify your services file is being loaded. — Cerad
– Cerad, Commented Apr 11, 2015 at 14:14
Do you really have to add the validatedBy() function in your UniqueEmail Class? My understanding was it is unnecessary symfony.com/doc/master/validation/… — Miles M.
– Miles M., Commented Jun 3, 2018 at 15:56

Nicole Bartolini · Accepted Answer · 2015-07-28 13:01:01Z

7

In your services.yml the alias is misspelled: 'unqiue.email.validator' instead of 'unique.email.validator'

answered Jul 28, 2015 at 13:01

Nicole Bartolini

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