public static function fetchAll($where = null, $order = null, $limit = null, $offset = null)
 {
     $resultSet = self::getDbTable()->fetchAll($where, $order, $limit, $offset);
     $entries = array();
     foreach ($resultSet as $row) {
         $entry = new Application_Model_O_DepartmentsAdditional();
         $entry->setId($row->id)->setDepartment_id($row->department_id)->setTitle($row->title)->setContent($row->content)->setImg($row->img)->setSort($row->sort)->setType($row->type)->setCtime($row->ctime)->setUtime($row->utime)->setStatus($row->status);
         $entry->setNew(false);
         $entries[] = $entry;
     }
     return $entries;
 }