laravel authorize(授权)

namespace App\Providers;
...
class AuthServiceProvider extends ServiceProvider
{
...

    public function boot(GateContract $gate)
    {
        parent::registerPolicies($gate);
        //定义授权能力
        $gate->define(‘update-post‘, function($user, $post){
            return $user->id == $post->user_id;
        });
    }
}

namespace App\Http\Controllers;
...
//在控制器中检验授权
class PostController extends Controller
{
    public function show($id)
    {
        //auth()->logout();
        auth()->loginUsingId(3);
        $post = Post::findOrFail($id);
        // if(Gate::denies(‘show-post‘, $post)){
        //     abort(403, ‘sorry, not sorry!‘);
        // }
        //$this->authorize(‘update-post‘, $post);
        return view(‘posts.show‘, compact(‘post‘));
    }
}

//在view中检验授权，如果通过才显示update链接
<h2>{{$post->title}}</h2>
@can(‘update-post‘, $post)
<a href=#>update</a>
@endcan

php artisan make:policy PostPolicy

namespace App\Providers;
...
class AuthServiceProvider extends ServiceProvider
{

    protected $policies = [
        // ‘App\Model‘ => ‘App\Policies\ModelPolicy‘,
        \App\Post::class => \App\Policies\PostPolicy::class,
    ];

namespace App\Policies;

use App\User;
use App\Post;

class PostPolicy
{   //可以建立多个检验方法对应不同场景
    public function update(User $user, Post $post)
    {
        return $user->id == $post->user_id;
    }
}