class IsNullConstraintValidator in Drupal 9

Null constraint validator.

Overrides the symfony validator to handle empty Typed Data structures.

Hierarchy

• class \Drupal\Core\Validation\Plugin\Validation\Constraint\IsNullConstraintValidator extends \Symfony\Component\Validator\Constraints\IsNullValidator uses TypedDataAwareValidatorTrait

File

core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php, line 16

Namespace

Drupal\Core\Validation\Plugin\Validation\Constraint

class IsNullConstraintValidator extends IsNullValidator {
  use TypedDataAwareValidatorTrait;

  /**
   * {@inheritdoc}
   */
  public function validate($value, Constraint $constraint) {
    $typed_data = $this
      ->getTypedData();
    if (($typed_data instanceof ListInterface || $typed_data instanceof ComplexDataInterface) && $typed_data
      ->isEmpty()) {
      $value = NULL;
    }
    parent::validate($value, $constraint);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
IsNullConstraintValidator::validate	public	function
TypedDataAwareValidatorTrait::getTypedData	public	function	Gets the typed data object for the validated value.