如何在FastAdmin中使用Ajax发送请求?

html页面：

js文件里添加以下代码：{field: 'uid', title: __('解绑'), table: table, buttons: [
        {
            name: 'ajax',
            text: __('解绑'),
            title: __('解绑'),
            classname: 'btn btn-xs btn-success btn-magic btn-ajax',
            icon: 'fa fa-magic',
            url: 'player/player/unbundling?',
            confirm: '确认是否要解绑',
            success: function (data, ret) {
                if(ret["msg"]["code"]==200){
                    Layer.alert("解绑"+ret["msg"]["msg"]);
                }
                else {
                    Layer.alert('<span id="" style="color: red;">'+ret["msg"]["msg"]+'</span>');
                }
            },
            error: function (data, ret) {
                console.log(data, ret);
                Layer.alert(ret.msg);
                return false;
            }
        }
    ], operate:false, formatter: Table.api.formatter.buttons},

后台代码如下：

public function addRoomCardSave(){
    $uid = $_POST["uid"];
    $num = $_POST["num"];
    $result = $this->commonFun($uid,$num);
    if(!$result){
        return $this->success("请求失败，服务器error");
    }
    else{
        $res = json_decode($result,true);
        return $this->success($res);
    }
}