Tp5 一次修改多个数据update

//商城矿机设置
    public function shop(){
        if(!request()->isPost()){

            return $this->fetch();
        }else {
            $mydata = input('post.');
            $result = '0';
            foreach ($mydata as $k=>$v){
                $resulta = Db::name('btm_shop')
                    ->where('id', $k)
                    ->update(['ags_level' => $v]);
                //if结果=1直接赋值
                if($resulta == 1){
                    $result = 1;
                }
            }
            if($result == 1){
                $data = ['status'=>1,'msg'=>'矿机修改成功'];
            }else{
                $data = ['status'=>0,'msg'=>'矿机修改失败'];
            }
            return json($data);

        }
    }