🐥 Using the RouteParameter annotation in Laravel FormRequest classes

If you want to have auto-complete in your IDEA and good static analysis of your route parameters in Laravel, you should be using the RouteParameter and CurrentUser annotations.

I always used to do something like this:

class UpdatePost extends FormRequest
{
    public function authorize(): bool {
        /** @var User $user */
        $user = Auth::user(); // Current user

        /** @var Post $post */
        $post = $this->route('post'); // Post from the request

        return $post->user_id === $user->id;
    }
    
    public function rules(): array {
        /** @var Post $post */
        $post = $this->route('post');

        return [
            'slug' => [
                'required',
                'string',
                Rule::unique(Post::class, 'slug')->ignore($post->id);
                // ...
        ];
    }
}

The phpdoc strings were needed to get the proper type support, but I somehow don't like them.

When using the proper annotations, you can do this instead:

use Illuminate\Container\Attributes\CurrentUser;
use Illuminate\Container\Attributes\RouteParameter;

class UpdatePost extends FormRequest
{
    public function authorize(
        #[CurrentUser] User $user, // The current user
        #[RouteParameter('post')] Post $post // The post from the route
    ): bool {
        return $post->user_id === $user->id;
    }
    
    public function rules(
        #[RouteParameter('post')] Post $post // The post from the route
    ): array {
        return [
            'slug' => [
                'required',
                'string',
                Rule::unique(Post::class, 'slug')->ignore($post->id);
                // ...
        ];
    }
}

This has been added in Laravel 11.28.x with this pull request.