Laravel中间件工作异常

Question

Surprisingly $this->middleware('guest')->except(['create', 'store']) is not working while $this->middleware('auth')->except(['index', 'show']); is working perfectly on PostsController. Both means the same logically, so why the first one is not working? Here is the PostsController:

<?php

namespace App\Http\Controllers;

use App\Post;

class PostsController extends Controller
{

    public function __construct() {
      $this->middleware('auth')->except(['index', 'show']);
    }

    public function index() {
      $posts = Post::latest()->get();
      return view('posts.index', compact('posts'));
    }

    public function show(Post $post) {
      return view('posts.show', compact('post'));
    }

    public function create() {
      return view('posts.create');
    }

    public function store() {

      $this->validate(request(), [
        'title' => 'required',
        'body' => 'required'
      ]);

      Post::create([
        'title' => request('title'),
        'body' => request('body'),
        'user_id' => auth()->id()
      ]);

      return redirect('/');
    }
}

Answer 1

$this->middleware('guest')->except(['create', 'store'])

and

$this->middleware('auth')->except(['index', 'show']);

don't mean the same logically.

The first code block means "Only guests can do all the requests in this controller, except for create and store so everyone can do these requests (as they're not limited to guests only).

The second code block means "Only authenticated users can do all the requests in this controller, except for index and show so everyone can do these requests (guests, authenticated users).

This is because in Laravel, no middleware = no filter to anyone. except doesn't apply the opposite middleware filter to a route/method.