class EntityReferenceSelectionHandlerGeneric_file

entityreference_autoload_info in core/modules/entityreference/entityreference.module

Implements hook_autoload_info().

class EntityReferenceSelectionHandlerGeneric_file extends EntityReferenceSelectionHandlerGeneric {

  protected $label_key = 'filename';

  public function entityFieldQueryAlter(SelectQueryInterface $query) {
    // Need to know about 'permanent' vs. 'temporary' files.
    $tables = $query->getTables();
    $base_table = key($tables);
    $query->condition('status', FILE_STATUS_PERMANENT);

    // Access control to files is a very difficult business.
    // @todo: Fix this when file access control is implemented.
    // @see File::access().
    return $query;
  }

  public function getLabel($entity) {
    // The file entity doesn't have a label. Moreover, the filename is
    // sometimes empty, so use the basename in that case.
    return $entity->filename !== '' ? $entity->filename : basename($entity->uri);
  }
}