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best practices for 'InvalidArgumentException' when using custom middleware for role-based access control in Laravel 9?

๐Ÿ‘€ Views: 430 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-13
laravel middleware access-control PHP

I'm implementing role-based access control in my Laravel 9 application using custom middleware. However, when I try to apply the middleware to my routes, I encounter an `InvalidArgumentException` stating that the guard is not defined. Hereโ€™s my middleware code: ```php namespace App\Http\Middleware; use Closure; use Illuminate\Support\Facades\Auth; class RoleMiddleware { public function handle($request, Closure $next, $role) { if (!Auth::check() || Auth::user()->role !== $role) { return redirect('/home'); } return $next($request); } } ``` I've registered the middleware in `app/Http/Kernel.php` as follows: ```php protected $routeMiddleware = [ 'role' => \App\Http\Middleware\RoleMiddleware::class, ]; ``` And Iโ€™m using it in my routes like this: ```php Route::get('/admin', [AdminController::class, 'index'])->middleware('role:admin'); ``` However, when I access the `/admin` route, I get the following behavior message: ``` InvalidArgumentException: Guard [web] is not defined. ``` I've double-checked my `config/auth.php` file and it seems like everything is set up correctly. The default guard is set to `web`, and I have a `users` provider configured. Hereโ€™s the relevant part of `auth.php`: ```php 'guards' => [ 'web' => [ 'driver' => 'session', 'provider' => 'users', ], ], 'providers' => [ 'users' => [ 'driver' => 'eloquent', 'model' => App\Models\User::class, ], ], ``` Iโ€™ve also tried clearing the configuration cache using `php artisan config:clear`, but the scenario continues. What could be causing this behavior, and how can I fix it to properly implement my role-based access control?