Symfony 3: Call default validator inside a Custom Validator and check it the field is validated

Question

I have a custom validator where I'm getting the value of one of the fields defined in my entity, and then I want to validate that field using built in validator (ex. NotBlank()) so that after a validation I get 'true' in case the field is validated and 'false' if it's not.

My custom validator looks like this:

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Constraints\NotBlank;
use Symfony\Component\Validator\ConstraintValidator;


class UpdatePasswordValidator extends ConstraintValidator
{

    public function __construct()
    {

    }

    public function validate($email, Constraint $constraint)
    {
        /**
         * Getting field value from entity
         */
        $busNumber = $this->context->getRoot()->getData()->getBusnumber();

        /**
         * Validate $busNumber
         */
        $busNumberToValidate = $this->context->getValidator()
            ->inContext($this->context)
            ->atPath("busnumber")
            ->validate($busNumber, new NotBlank())->getViolations();
    }
}

In this case I want to validate $busNumber using NotBlank(). Calling getViolations() gives me an object with all violations while I just need one that is associated with the $busNumber validation.

Update: what I'm actually trying to achieve is this:

if ($busNumberToValidate)
{
    echo "busNumber field is validated";
}
else
{
    echo "busNumber field is NOT validated";    
}

The $busNumberToValidate should contain or not an error for 'busNumber' field depending on the validation result.

rvaliev rvaliev · Accepted Answer · 2016-03-30T13:44:41

Here is the solution:

$busNumberToValidate = $this->context->getValidator()->validate($busNumber, new NotBlank());

if ($busNumberToValidate->has(0))
{
  echo "field is not validated";
}
else
{
  echo "field is validated";
}

// if you want to get the error message for the validated field 
echo $busNumberToValidate->get(0)->getMessage();

Symfony 3: Call default validator inside a Custom Validator and check it the field is validated

2 Answers