我有一个名为“AdminMiddleware”的中间件，它在类的构造函数中使用。由于某种原因，虽然构造函数正在运行，但没有从构造函数调用中间件。我尝试在adminMiddleware文件上执行一个die转储，但它似乎忽略了此文件。

namespace App\Http\Controllers\SuperAdmin;

    use Illuminate\Http\Request;

    use App\Http\Requests;
    use App\Http\Controllers\Controller;
    use Illuminate\Support\Facades\Auth;

        class dashboard extends Controller
        {
            protected $user;

            public function __construct()
                {
                    $this->middleware('admin');
                    $this->user = Auth::User();
                }

//Kernel.php
    protected $routeMiddleware = [
        'auth' => \App\Http\Middleware\Authenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'superadmin' => \App\Http\Middleware\SuperAdminMiddleware::class,
        'admin' => \App\Http\Middleware\AdminMiddleware::class,
    ];

对于一些项目的需求，我不能直接使用中间件的路线。任何帮助是感谢，我正在使用laravel 5.1。