public function find($id, Default_Model_Site $site)
 {
     $result = $this->getDbTable()->find($id);
     if (0 == count($result)) {
         return;
     }
     $row = $result->current();
     $site->setId($row->id);
     $site->setSite($row->site);
     $site->setTrusted($row->trusted);
     $site->setDate($row->date);
     $site->setOpenid($row->openid);
 }