Laravel5.2: Session store not set on request報錯

一開始我在寫登錄模板時，將取到的數據存入session中，在同一個控制器內寫入在立馬print出來沒有什麼問題，我認爲session是已經啓動了的。但是再通過另一個控制器來打印這個變量就顯示爲NULL。
在網上找了很久也沒有找到合適的答案，按照網上的方法試了一天，輸入composer update然而沒有什麼反應，我已經更新到最新了，還有的說是laravel版本的原因，要laravel5.2以上的纔可以。因爲我是小白，對於中間件的操作只是停留在基礎。我先用php artisan --version查看了我的版本，我的是Laravel Framework version 5.2.22。
不過看到國外有位大神說5.2版本中間件有點啥問題，將session放到global middleware中。
\Illuminate\Session\Middleware\StartSession::class,
加在Kernel.php中間件內，加完後的代碼如下：

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;

class Kernel extends HttpKernel
{
   /**
    * The application's global HTTP middleware stack.
    *
    * These middleware are run during every request to your application.
    *
    * @var array
    */
   protected $middleware = [
       \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
       \Illuminate\Session\Middleware\StartSession::class,
   ];

   /**
    * The application's route middleware groups.
    *
    * @var array
    */
   protected $middlewareGroups = [

       'web' => [
           \App\Http\Middleware\EncryptCookies::class,
           \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
           \Illuminate\View\Middleware\ShareErrorsFromSession::class,
           \App\Http\Middleware\VerifyCsrfToken::class,
       ],

       'api' => [
           'throttle:60,1',
       ],
   ];

   /**
    * The application's route middleware.
    *
    * These middleware may be assigned to groups or used individually.
    *
    * @var array
    */
   protected $routeMiddleware = [
       'auth' => \App\Http\Middleware\Authenticate::class,
       'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
       'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
       'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
   ];
}

作爲小白的第一篇文章，從此開始我的技術之旅。