Symfony 3.4：RecursiveValidator还是TraceableValidator？

Question

I have a problem with my service.

 <service id="api.api" class="ApiBundle\Service\ApiService">
        <argument type="service" id="request_stack"/>
        <argument type="service" id="validator"/>
 </service>

The __construct is :

public function __construct(RequestStack $requestStack, RecursiveValidator  $validator)
{
    $this->request = $requestStack->getCurrentRequest();
    $this->validator = $validator;
}

The problem is:

• ENV_DEV, the validator must be an instance of TraceableValidator
• ENV_PROD, the validator must be an instance of RecursiveValidator

Do you know why I have this conflict ?

In ENV_DEV with RecursiveValidator, I have this error :

Type error: Argument 2 passed to 
ApiBundle\Service\ApiService::__construct() must be an instance of 
Symfony\Component\Validator\Validator\RecursiveValidator, 
instance of Symfony\Component\Validator\Validator\TraceableValidator 
given, called in 
var/cache/dev/ContainerLqjid6c/getApi_ApiService.php on line 8

cache:clear doesn't solve the problem.

Thank you for your help.

Answer 1

Instead of hinting to an implementation, you should always (if available) hint to an interface. In this case, both RecursiveValidator and TraceableValidator implement the ValidatorInterface .

So your constructor should look like this:

public function __construct(RequestStack $requestStack, ValidatorInterface  $validator)
{
    $this->request = $requestStack->getCurrentRequest();
    $this->validator = $validator;
}