$add =  M("Users");
    $Ret = -1;
    try{
        $data = array('opeind'=>'o5Y-RwfCIidSkL5LhTMVWKPxxx','user_name'=>'sdfsadf','account'=>'123456');
        $Ret =$add->add($data);
    }catch(\Exception $e){
        if($e->getCode()==23000){
            echo "插入的数据Unique导致的错误";
            die();
        }
    }