My coding mistake or problem with the integrity of the data?

Question

I'm learning Laravel from Laracasts videos and so far I've made simple blog with 4 posts that are dynamic but only 2 of them when I click on the name of the post open up the other 2 show error 404 not found

Example of a working one - https://ctrlv.cz/dgUM Example of a not working one - https://ctrlv.cz/MZrP

web.php code with routes

<?php

use Illuminate\Support\Facades\Route;
use App\Models\Post;
use Spatie\YamlFrontMatter\YamlFrontMatter;

Route::get('/', function () {
    $files = File::files(resource_path("posts"));
    $posts = [];

    foreach ($files as $file) {
        $document = YamlFrontMatter::parseFile($file);

        $posts[] = new Post(
        $document->title,
        $document->excerpt,
        $document->date,
        $document->body(),
        $document->slug
        );
    }
    
    return view('posts', [
   'posts' => $posts
    ]);
});

Route::get('posts/{post}', function ($slug) {
    return view ('post', [
        'post' => Post::find($slug)
  ]);
})->where('post', '[A-z_\-]+');

post.php

<?php

namespace App\Models;

use Illuminate\Support\Facades\File;

class Post
{
    public $title;
    public $excerpt;
    public $date;
    public $body;
    public $slug;

    public function __construct($title, $excerpt, $date, $body, $slug)
    {
        $this->title = $title;
        $this->excerpt = $excerpt;
        $this->date = $date;
        $this->body = $body;
        $this->slug = $slug;
    }
   
    public static function all()
    {
        $files = File::files(resource_path("posts/"));

        return array_map(fn($file) => $file->getContents(), $files);
    }

    public static function find($slug)
    {
        if (! file_exists($path = resource_path("posts/{$slug}.html"))) {
            throw new ModelNotFoundException();
        }

        return cache()->remember("posts.{$slug}", 3600, fn() => file_get_contents($path));

    }
}

Answer 1

I don't think your where filter for the posts route is going to work correctly.

1. For regular expressions, in order to be case insensitive, you would need to use [A-Za-z_\-]+ for the character ranges A-Z and a-z. If you look at an ASCII table, you can see A-z would also include characters like [ \ ] ^ _ etc.
2. In your second example, your post slug in the url uses a character with an accent mark, I think: í. This is not in the regular ACSII alphabet, and is therefore not in the range a-z. Instead, you can try using the regular expression value \w with unicode mode enabled, or just \pL which will match any kind of letter from any language. If you use the latter, I'd also add \d which is equivalent to 0-9.

So, basically, I think you should change the route's where filter to something like this:

where('post', '[-_\pL\d]+');

Or,

where('post', '/[-\w]+/u'); // NOTE: I do not know if Laravel supports adding regex modifiers, so this might not work.