Lumen 角色中间件缺少参数答案

【问题标题】：Lumen role middleware missing argumentLumen 角色中间件缺少参数
【发布时间】：2016-03-20 03:27:07
【问题描述】：

我是 Lumen 的新手，我正在尝试通过 Lumen 文档中的示例让角色中间件工作： http://lumen.laravel.com/docs/middleware#middleware-parameters

但是一旦我像这样将中间件添加到路由中：

$app->get('/', ['middleware' => 'role:editor', 'uses' => 'IndexController@index']);

我得到错误：

at Application->Laravel\Lumen\{closure}('2', 'Missing argument 3 for App\Http\Middleware\RoleMiddleware::handle()', '/Users/peter/app/Http/Middleware/RoleMiddleware.php', '17', array('request' => object(Request), 'next' => object(Closure))) in RoleMiddleware.php line 17

当我删除中间件时，一切都按预期工作

$app->get('/', ['uses' => 'IndexController@index']);

在 app.php 中：

$app->middleware([
    Illuminate\Cookie\Middleware\EncryptCookies::class,
    Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
    Illuminate\Session\Middleware\StartSession::class,
    Illuminate\View\Middleware\ShareErrorsFromSession::class,
    Laravel\Lumen\Http\Middleware\VerifyCsrfToken::class,
    App\Http\Middleware\RoleMiddleware::class
]);

App\Http\Middleware\RoleMiddleware.php：

<?php

namespace App\Http\Middleware;

use Closure;

class RoleMiddleware
{
    public function handle($request, Closure $next, $role) // <-line 17
    {
        if (! $request->user()->hasRole($role)) {
            // Redirect...
        }
        return $next($request);
    }
}

希望有人能帮忙

【问题讨论】：

显示 RoleMiddleware 类
添加了 RoleMiddleware 类

标签： php laravel routing middleware lumen

【解决方案1】：

根据错误，我了解到您没有在 handle() 中提供参数，即第三个参数。

您的handle() 应该如下所示。

public function handle($request, Closure $next, $role)

第三个参数$role 根据您的代码存储值editor

【讨论】：

奇怪的是它完全一样的“public function handle($request, Closure $next, $role)”

【解决方案2】：

似乎您必须将中间件注册为 RouteMiddleware 所以而不是：

$app->middleware([
    Illuminate\Cookie\Middleware\EncryptCookies::class,
    Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
    Illuminate\Session\Middleware\StartSession::class,
    Illuminate\View\Middleware\ShareErrorsFromSession::class,
    Laravel\Lumen\Http\Middleware\VerifyCsrfToken::class,
    App\Http\Middleware\RoleMiddleware::class
]);

必须是：

$app->middleware([
    Illuminate\Cookie\Middleware\EncryptCookies::class,
    Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
    Illuminate\Session\Middleware\StartSession::class,
    Illuminate\View\Middleware\ShareErrorsFromSession::class,
    Laravel\Lumen\Http\Middleware\VerifyCsrfToken::class,
]);

$app->routeMiddleware([
    "role" => App\Http\Middleware\RoleMiddleware::class
]);

然后它就可以正常工作了！

【讨论】：