function DataReferenceTargetDefinition::getConstraints

Overrides DataDefinition::getConstraints

File

core/lib/Drupal/Core/TypedData/DataReferenceTargetDefinition.php, line 22

Class

DataReferenceTargetDefinition

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

Namespace

Code

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;
}