class DataReferenceTargetDefinition

A typed data definition class for the entity reference target_id property.

The target_id property differs from other data definitions in that it is required at the storage level, but not at the validation level. This is because its value can be set just-in-time using the preSave() method.

Validation for the target_id property is provided by the 'ValidReference' validation constraint.

Hierarchy

• class \Drupal\Core\TypedData\DataDefinition implements \Drupal\Core\TypedData\DataDefinitionInterface, \Drupal\Core\TypedData\ArrayAccess uses \Drupal\Core\TypedData\TypedDataTrait
  • class \Drupal\Core\TypedData\DataReferenceTargetDefinition extends \Drupal\Core\TypedData\DataDefinition

Expanded class hierarchy of DataReferenceTargetDefinition

See also

\Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem::preSave()

File

core/lib/Drupal/Core/TypedData/DataReferenceTargetDefinition.php, line 17

Namespace

class DataReferenceTargetDefinition extends DataDefinition {
  
  /**
   * {@inheritdoc}
   */
  public function getConstraints() {
    $constraints = parent::getConstraints();
    // If this data definition is marked as required for the sake of schema
    // definitions, we don't enforce it using the NotNull constraint. Instead
    // \Drupal\Core\Field\EntityReferenceItem is validated by the
    // 'ValidReference' constraint that operates at the field-item level. This
    // constraint takes into consideration that the target_id property can
    // be derived from the entity property.
    unset($constraints['NotNull']);
    return $constraints;
  }

}

Members