public function UniqueFieldValueValidator::validate in Zircon Profile 8

Same name and namespace in other branches

1. 8.0 core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldValueValidator.php \Drupal\Core\Validation\Plugin\Validation\Constraint\UniqueFieldValueValidator::validate()

Checks if the passed value is valid.

Parameters

mixed $value The value that should be validated:

Constraint $constraint The constraint for the validation:

Overrides ConstraintValidatorInterface::validate

File

core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldValueValidator.php, line 22

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

Class

UniqueFieldValueValidator

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

Namespace

Drupal\Core\Validation\Plugin\Validation\Constraint

Code

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()),
    ]);
  }
}