How to use GATE facades in LUMEN (Laravel 6.2) - php

Question

I'm trying to create an ACL with Lumen.
I want to use the built-in gates/policies to do so.
I've been following the official Lumen Docs:
https://lumen.laravel.com/docs/6.x/authorization
and Laravel Docs:
https://laravel.com/docs/6.x/authorization
to do so. They say I need to register both facades and the gate facade in order to use Gates.
I have the following code inside my AuthServiceProvider.php:
<?php
namespace App\Providers;
use App\User;
use Firebase\JWT\JWT;
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Gate;
//use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Http\Request;
class AuthServiceProvider extends ServiceProvider
{
/**
* Register any application services.
*
* #return void
*/
public function register()
{
//
}
/**
* Boot the authentication services for the application.
*
* #return void
*/
public function boot()
{
// Here you may define how you wish users to be authenticated for your Lumen
// application. The callback which receives the incoming request instance
// should return either a User instance or null. You're free to obtain
// the User instance via an API token or any other method necessary.
$this->app['auth']->viaRequest('api', function ($request) {
$key = 'pawifjopawiejfpoaiwejfpoji';
$jwt = preg_replace('/^Bearer (.*)/', '$1', $request->header('Authorization'));
$decoded = JWT::decode($jwt, $key, ['HS256']);
return User::where('email', $decoded->email)->first();
});
$this->registerPolicies();
Gate::define('edit-settings', function($user){
return $user->isAdmin;
});
}
}
And I have the bootstrap/app.php set like so, with $app->withFacades() uncommented:
<?php
require_once __DIR__.'/../vendor/autoload.php';
(new Laravel\Lumen\Bootstrap\LoadEnvironmentVariables(
dirname(__DIR__)
))->bootstrap();
/*
|--------------------------------------------------------------------------
| Create The Application
|--------------------------------------------------------------------------
|
| Here we will load the environment and create the application instance
| that serves as the central piece of this framework. We'll use this
| application as an "IoC" container and router for this framework.
|
*/
$app = new Laravel\Lumen\Application(
dirname(__DIR__)
);
$app->withFacades();
$app->withEloquent();
/*
|--------------------------------------------------------------------------
| Register Container Bindings
|--------------------------------------------------------------------------
|
| Now we will register a few bindings in the service container. We will
| register the exception handler and the console kernel. You may add
| your own bindings here if you like or you can make another file.
|
*/
$app->singleton(
Illuminate\Contracts\Debug\ExceptionHandler::class,
App\Exceptions\Handler::class
);
$app->singleton(
Illuminate\Contracts\Console\Kernel::class,
App\Console\Kernel::class
);
/*
|--------------------------------------------------------------------------
| Register Middleware
|--------------------------------------------------------------------------
|
| Next, we will register the middleware with the application. These can
| be global middleware that run before and after each request into a
| route or middleware that'll be assigned to some specific routes.
|
*/
// $app->middleware([
// App\Http\Middleware\ExampleMiddleware::class
// ]);
$app->routeMiddleware([
'auth' => App\Http\Middleware\Authenticate::class,
]);
/*
|--------------------------------------------------------------------------
| Register Service Providers
|--------------------------------------------------------------------------
|
| Here we will register all of the application's service providers which
| are used to bind services into the container. Service providers are
| totally optional, so you are not required to uncomment this line.
|
*/
// $app->register(App\Providers\AppServiceProvider::class);
$app->register(App\Providers\AuthServiceProvider::class);
// $app->register(App\Providers\EventServiceProvider::class);
/*
|--------------------------------------------------------------------------
| Load The Application Routes
|--------------------------------------------------------------------------
|
| Next we will include the routes file so that they can all be added to
| the application. This will provide all of the URLs the application
| can respond to, as well as the controllers that may handle them.
|
*/
$app->router->group([
'namespace' => 'App\Http\Controllers',
], function ($router) {
require __DIR__.'/../routes/web.php';
});
return $app;
And when I now run any http-request with RESTClient (www.restclient.net) against my Lumen API, I get the following error:
Call to undefined method App\Providers\AuthServiceProvider::registerPolicies()
I googled quite a lot on this issue and found some solutions, but none of them worked for me.
Please help

Answer 1

Your provider doesn't have that method. This is the entire AuthServiceProvider that Laravel uses as its base for AuthServiceProvider:
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\ServiceProvider;
class AuthServiceProvider extends ServiceProvider
{
/**
* The policy mappings for the application.
*
* #var array
*/
protected $policies = [];
/**
* Register the application's policies.
*
* #return void
*/
public function registerPolicies()
{
foreach ($this->policies() as $key => $value) {
Gate::policy($key, $value);
}
}
/**
* Get the policies defined on the provider.
*
* #return array
*/
public function policies()
{
return $this->policies;
}
}
registerPolicies isn't doing anything special. It just spins through $policies and registers them; you can do this yourself.
"Unlike Laravel, Lumen does not have a $policies array on its AuthServiceProvider. However, you may still call the policy method on the Gate facade from within the provider's boot method" - Lumen 6.x Docs - Authorization - Defining Policies