class UniqueFieldValueValidator in Zircon Profile 8

Validates that a field is unique for the given entity type.

Hierarchy

• class \Symfony\Component\Validator\ConstraintValidator implements ConstraintValidatorInterface
  • class \Drupal\Core\Validation\Plugin\Validation\Constraint\UniqueFieldValueValidator

File

core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldValueValidator.php, line 17

Contains \Drupal\Core\Validation\Plugin\Validation\Constraint\UniqueFieldValueValidator.

Namespace

Drupal\Core\Validation\Plugin\Validation\Constraint

class UniqueFieldValueValidator extends ConstraintValidator {

  /**
   * {@inheritdoc}
   */
  public function validate($items, Constraint $constraint) {
    if (!($item = $items
      ->first())) {
      return;
    }
    $field_name = $items
      ->getFieldDefinition()
      ->getName();

    /** @var \Drupal\Core\Entity\EntityInterface $entity */
    $entity = $items
      ->getEntity();
    $entity_type_id = $entity
      ->getEntityTypeId();
    $id_key = $entity
      ->getEntityType()
      ->getKey('id');
    $value_taken = (bool) \Drupal::entityQuery($entity_type_id)
      ->condition($id_key, (int) $items
      ->getEntity()
      ->id(), '<>')
      ->condition($field_name, $item->value)
      ->range(0, 1)
      ->count()
      ->execute();
    if ($value_taken) {
      $this->context
        ->addViolation($constraint->message, [
        '%value' => $item->value,
        '@entity_type' => $entity
          ->getEntityType()
          ->getLowercaseLabel(),
        '@field_name' => Unicode::strtolower($items
          ->getFieldDefinition()
          ->getLabel()),
      ]);
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
ConstraintValidator::$context	protected	property		3
ConstraintValidator::buildViolation Deprecated	protected	function	Wrapper for {@link ExecutionContextInterface::buildViolation} that supports the 2.4 context API.
ConstraintValidator::buildViolationInContext Deprecated	protected	function	Wrapper for {@link ExecutionContextInterface::buildViolation} that supports the 2.4 context API.
ConstraintValidator::formatTypeOf	protected	function	Returns a string representation of the type of the value.
ConstraintValidator::formatValue	protected	function	Returns a string representation of the value.
ConstraintValidator::formatValues	protected	function	Returns a string representation of a list of values.
ConstraintValidator::initialize	public	function	Initializes the constraint validator. Overrides ConstraintValidatorInterface::initialize	1
ConstraintValidator::OBJECT_TO_STRING		constant	Whether to cast objects with a "__toString()" method to strings.
ConstraintValidator::PRETTY_DATE		constant	Whether to format {@link \DateTime} objects as RFC-3339 dates ("Y-m-d H:i:s").
UniqueFieldValueValidator::validate	public	function	Checks if the passed value is valid. Overrides ConstraintValidatorInterface::validate