I am trying to implement policies in Laravel with the following code
I have a controller to update the Post
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Post;
class PostController extends Controller
{
public function index(){
return view('post.index',['posts' => Post::all()]);
}
public function update($id){
return view('post.update',['post' => Post::findOrFail($id)]);
}
}
And I have the Gate defined in AuthServiceProvider.php
public function boot()
{
$this->registerPolicies();
Gate::define('update-post', function ($user,Post $post) {
return $user->id == $post->user_id;
});
}
My Route for update the post like this
Route::get('post/update/{post}', 'PostController@update')
->name('update-post')
->middleware('can:update-post,post');
But when I open the following page http://localhost/dev/cc/laravel/user/public/post/update/1 I am getting the following error
Argument 2 passed to App\Providers\AuthServiceProvider::App\Providers\{closure}() must be an instance of App\Post, string given, called in /Applications/XAMPP/xamppfiles/htdocs/dev/cc/laravel/user/vendor/laravel/framework/src/Illuminate/Auth/Access/Gate.php on line 298 and defined
in AuthServiceProvider.php (line 30)
at HandleExceptions->handleError(4096, 'Argument 2 passed to App\\Providers\\AuthServiceProvider::App\\Providers\\{closure}() must be an instance of App\\Post, string given, called in /Applications/XAMPP/xamppfiles/htdocs/dev/cc/laravel/user/vendor/laravel/framework/src/Illuminate/Auth/Access/Gate.php on line 298 and defined', '/Applications/XAMPP/xamppfiles/htdocs/dev/cc/laravel/user/app/Providers/AuthServiceProvider.php', 30, array('user' => object(User)))in AuthServiceProvider.php (line 30)
Solution
This is a problem related to the implicit model binding in Laravel. To fix this issue you can do some change to the action in the PostController
Post::all()]);
}
public function update(Post $post){
return view('post.update',['post' => $post]);
}
}