Is there a way to access the entity of the property currently being validated in a custom constraint validator, and if so, how? As far as i can see, I only have access to the value (and any services I might choose to inject, of course).
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4 Answers
In case if you have property validator, you can also access validated object in Validator through ExecutionContext:
class SomeValidator extends ConstraintValidator
{
public function validate($value, Constraint $constraint)
{
$object = $this->context->getObject();
}
}
1 Comment
Bruno Santos
This returns null. Any idea why?
Yes, there is a way. Class constraint validator has an entire entity in scope.
2 Comments
Eirik A. Johansen
Thanks! The documentation was somewhat unclear so I didn't quote catch that.
Milos Cuculovic
@EirikA.Johansen, could you please provide an example? I am trying to do the same thing as described in the Symfony example but without success. A more detaild example will be perfect.
I was in need for that too. Please find below a full example :
The entity:
<?php
namespace AppBundle\Entity\MarketPlace;
use Doctrine\ORM\Mapping AS ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use AppBundle\Model\BaseCategoryClass as BaseCategory;
use AppBundle\Validator\Constraints as FMUAssert;
/**
* @ORM\Entity(repositoryClass="AppBundle\Repository\MarketPlace\ProductRepository")
* @Gedmo\Tree(type="nested")
* @FMUAssert\UnitConstraint()
*/
class Product extends BaseCategory
{
/**
* @ORM\Id
* @ORM\Column(type="integer", length=11)
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
}
The constraint:
<?php
namespace AppBundle\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
/**
* @Annotation
*/
class UnitConstraint extends Constraint
{
public $message = 'La chaîne "%string%" contient un caractère non autorisé : elle ne peut contenir que des lettres et des chiffres.';
public function validatedBy()
{
return 'unit_validator';
}
public function getTargets()
{
return self::CLASS_CONSTRAINT;
}
}
The constraint Validator:
<?php
namespace AppBundle\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
class UnitConstraintValidator extends ConstraintValidator
{
public function validate($entity, Constraint $constraint)
{
exit(var_dump(get_class($entity)));
$this->context->addViolation($constraint->message, array('%string%' => $value));
}
}
And the declaration as a service:
services:
unit_validator:
class: %unit_validator.class%
tags:
- { name: validator.constraint_validator, alias: unit_validator }
The exit vardump I've put does get me the entity class name, it's working!
1 Comment
cezar
Great! Just one little remark: you could also use
dump instead of var_dump. It shows the output very nicely formatted and styled.Ey, well it depends on how are you validating the entity. For example, I'm validating my entity through a Form so, to get the entity in the ConstraintValidator I just need to get de context root and get the data from my form:
/**
* @Annotation
*/
class ValidDnieValidator extends ConstraintValidator
{
public function validate($value, Constraint $constraint)
{
$user = $this->context->getRoot()->getData();
