如何在表單請求中訪問請求的非id屬性？

Question

我想在laravel form請求授權裏面訪問路由請求參數。我無法找到一個描述這一點的例子。

// Works fine when you want id 
dd($this->route('myResourceName')); 

// How to do when I want something else??? 
dd($this->route('anotherAttribute')); 
// Above give null probably because it is a resourceful controller 

在一個側面說明，我不明白這個設計，有什麼意義？ $ this-> route（'anyAttribute'）會是最簡單的，對吧？

編輯：更廣泛的例子

class UpdateSlotAPIRequest extends APIRequest 
{ 
    public function __construct(){ 
     parent::__construct();   
     $this->slot = Slot::find($this->route('slot')); 
     $this->access_token = $this->route('access_token'); // this is not working! 
    }  
    /** 
    * Determine if the user is authorized to make this request. 
    * 
    * @return bool 
    */ 
    public function authorize() 
    { 
     // If administrator is logged in all is good. 
     // If slot is free its ok. 
     // If its not free but you provide good access_token its also fine. 
     return Auth::check() || $this->slot->isAvailable() || $this->slot->isValidAccessToken($this->access_token); 
    } 
... 

```

Answer 1

$access_token = request()->input('access_token'); 

在https://laravel.com/docs/5.4/helpers