$this->model = new \app\api\model\Article();
        $this->model2= new \app\api\model\Category();
    }

    public function index($id)
    {
        (new IDMustBePostiveInt())->goCheck();
        $res = $this->model->with(["image","cate"])->find(["id"=>$id]);
        if(!$res){
            throw new ParameterException([
                "msg"=>"该文章不存在"
            ]);
        }
        $type = $res["catetype"];
        switch ($type){
            case 1: $title = "资讯中心"; break;
            case 2: $title = "成功案例"; break;
            case 3: $title = "系统方案"; break;
            case 5: $title = $res["title"]; ; break;