class IsNullConstraint in Drupal 9

Null constraint.

Overrides the symfony constraint to handle empty Typed Data structures.

Plugin annotation

@Constraint(
  id = "Null",
  label = @Translation("Null", context = "Validation"),
  type = false
)

Hierarchy

• class \Drupal\Core\Validation\Plugin\Validation\Constraint\IsNullConstraint extends \Symfony\Component\Validator\Constraints\IsNull

File

core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraint.php, line 18

Namespace

Drupal\Core\Validation\Plugin\Validation\Constraint

class IsNullConstraint extends IsNull {

}