/**
* update record
*
* @param App_Shop_Dm $dm
* @return multitype:|Ambigous <boolean, number, rowCount>
*/
public function update($id, App_Shop_Dm $dm)
{
if (true !== ($r = $dm->beforeUpdate())) {
return $r;
}
return $this->loadDao()->update($id, $dm->getData());
}