Symfony custom validator as service

Question

Trying to follow the custom validator as as service example from the official docs . I have defined my validator as a service in my "services.yml":

cf.validator.unique.in.system:
            class: 'CF\AppBundle\Validator\Constraints\UniqueInSystemValidator'
            arguments: ['@doctrine']
            tags:
                - { name: 'validator.constraint_validator', alias: 'cf.validator.unique.in.system' }

I have created the neccesary constraint and validator classes:

constraint

namespace CF\AppBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

/**
 * @Annotation
 */
class UniqueInSystem extends Constraint
{
    public $message = 'This value is already used.';

    public function getTargets()
    {
        return self::CLASS_CONSTRAINT;
    }

    public function validatedBy()
    {
        return 'cf.validator.unique.in.system';
    }
}

validator

namespace CF\AppBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Doctrine\Bundle\DoctrineBundle\Registry as Doctrine;

/**
 * @Annotation
 */
class UniqueInSystemValidator extends ConstraintValidator
{
    protected  $em;

    public  function  __construct(Doctrine $doctrine)
    {
        $this->em = $doctrine->getManager();
    }
    public function validate($subsystem, Constraint $constraint)
    {

        1==1; // here is a breakpoint by now
//        $this->context->addViolationAt('[expiresAt].expiresAt', $constraint->message, ['%string%' => $value->format('Y-m-d')] );
    }

What I do not understand, is the error message that I get:FatalErrorException: Error: Class '\Symfony\Component\Validator\Constraints\CF\AppBundle\Validators\Constraints\UniqueInSystem' not found in /var/www/escritorio.dev/application/vendor/symfony/symfony/src/Symfony/Component/Validator/Mapping/Loader/AbstractLoader.php line 89

Especially this part: '\Symfony\Component\Validator\Constraints\CF\AppBundle\Validators\Constraints\UniqueInSystem'. Why symfony tries to search in this weird namespace? How to avoid this issue?

UPD

The validator itself is applied via /src/CF/AppBundle/Resources/config/validation.yml:

CF\AppBundle\Entity\SubSystem:
  constraints:
      - CF\AppBundle\Validators\Constraints\UniqueInSystem: ~
  properties:
    name:
      - NotBlank: ~
      - Length:
          max: 100
    owner:
      - NotBlank: ~
    leader:
      - NotBlank: ~
    system:
      - NotBlank: ~
    status:
      - NotBlank : ~
      - Type:
          type: integer

The app/console container:debug output:

$ php app/console container:debug  | grep CF
auc_helper                                         container CF\AppBundle\Services\AucHelper
cf.validator.unique.in.system                      container CF\AppBundle\Validator\Constraints\UniqueInSystemValidator

Could you check please what will be the result of class_exists('CF\AppBundle\Validators\Constraints\UniqueInSystem') (somewhere in controller) — Andrii Mishchenko
– Andrii Mishchenko, Commented Aug 11, 2015 at 13:00
Are you sure cf.validator.unique.in.system is properly injected to the container? If symfony cannot find validator by alias it will try to include class with the provided validator name. — Vadim Ashikhman
– Vadim Ashikhman, Commented Aug 11, 2015 at 13:00
The problem is in the way you are using the constraint. I'm guessing you need a use statement. Update your question with an example of how you are trying to apply the constraint. — Cerad
– Cerad, Commented Aug 11, 2015 at 13:07
I checked the service container within the app/console container:debug and I see it loaded — Vit Kos
– Vit Kos, Commented Aug 11, 2015 at 13:07

Cerad · Accepted Answer · 2015-08-11 15:03:24Z

8

// This
CF\AppBundle\Entity\SubSystem:
  constraints:
    - CF\AppBundle\Validators\Constraints\UniqueInSystem: ~

// Should be
CF\AppBundle\Entity\SubSystem:
  constraints:
    - CF\AppBundle\Validator\Constraints\UniqueInSystem: ~

It's always been a bit of a mystery as to why the Constraints directory is not called Constraint. But Validator has always been called Validator.

answered Aug 11, 2015 at 15:03

Cerad

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