在具有资源路由的中间件中获取路由参数

Question

这有点奇怪，因为我遵循了在线的所有有关在中间件中获取路由参数的内容，并且所有这些参数都返回NULL或错误，这就是我已经尝试过但没有起作用的内容：

    public function handle($request, Closure $next)
    {
        $token = $request->access_token;
        // Do something with $token
    }

这个返回NULL。

public function handle($request, Closure $next)
    {
        $request->route('parameter_name');
        // Do something with $token
    }

而以上这一点则宣告NULL。

public function handle($request, Closure $next)
    {
        $request->route()->parameters();
        // Do something with $token
    }

上面的这个返回：

CheckOwner.php第22行中的FatalThrowableError：在null上调用成员函数parameters（）

我要检查的是，基于URL的“ id”参数中的id和数据库中产品行中的“ user_id”这两项，检查当前尝试编辑产品的用户是否是该产品的所有者。 那就是我的代码：

中间件：

class CheckOwner
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        //Get product from $id to edit
        $product = Product::find($request->parameter('product'));
        if ($product->user_id != Auth::user()->id) {
            return redirect('home');
        }
        return $next($request);
    }
}

这就是我的路线，它是资源路线：

//Products controller show, store, edit, update, destroy
    Route::resource('products', 'ProductsController');

这就是我在内核页面中注册中间件的方式：

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,
        \App\Http\Middleware\CheckOwner::class,
    ];

    /**
     * The application's route middleware groups.
     *
     * @var array
     */
    protected $middlewareGroups = [
        'web' => [
            \App\Http\Middleware\EncryptCookies::class,
            \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
            \Illuminate\Session\Middleware\StartSession::class,
            \Illuminate\View\Middleware\ShareErrorsFromSession::class,
            \App\Http\Middleware\VerifyCsrfToken::class,
            \Illuminate\Routing\Middleware\SubstituteBindings::class,
        ],

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

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

        /**** OTHER MIDDLEWARE ****/
        'localize' => \Mcamara\LaravelLocalization\Middleware\LaravelLocalizationRoutes::class,
        'localizationRedirect' => \Mcamara\LaravelLocalization\Middleware\LaravelLocalizationRedirectFilter::class,
        'localeSessionRedirect' => \Mcamara\LaravelLocalization\Middleware\LocaleSessionRedirect::class
        // REDIRECTION MIDDLEWARE
    ];
}

现在根据上面的代码返回此错误：

Macroable.php第74行中的BadMethodCallException：方法参数不存在。

更新：这就是我在控制器的构造函数中使用中间件的地方：

public function __construct()
    {
        //Kick him/her out if he is not logged in
        $this->middleware('auth', ['except' => ['show']]);
        $this->middleware('checkowner', ['except' => ['create', 'store', 'show', 'update', 'delete']]);
    }

Answer 1

全局中间件在路由解决之前运行。

如果需要访问路由参数，请使用中间件作为路由中间件：

protected $middlewareGroups = [
    'web' => [
        \App\Http\Middleware\CheckOwner::class,
        // the rest of your middleware...
    ],
];