Use MapEntity for get Tag entity

Author: seb-jean

src/Controller/BlogController.php

@@ -13,11 +13,11 @@
 
 use App\Entity\Comment;
 use App\Entity\Post;
+use App\Entity\Tag;
 use App\Entity\User;
 use App\Event\CommentCreatedEvent;
 use App\Form\CommentType;
 use App\Repository\PostRepository;
-use App\Repository\TagRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bridge\Doctrine\Attribute\MapEntity;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
@@ -49,14 +49,13 @@ final class BlogController extends AbstractController
     #[Route('/rss.xml', name: 'blog_rss', defaults: ['page' => '1', '_format' => 'xml'], methods: ['GET'])]
     #[Route('/page/{page}', name: 'blog_index_paginated', defaults: ['_format' => 'html'], requirements: ['page' => Requirement::POSITIVE_INT], methods: ['GET'])]
     #[Cache(smaxage: 10)]
-    public function index(Request $request, int $page, string $_format, PostRepository $posts, TagRepository $tags): Response
-    {
-        $tag = null;
-
-        if ($request->query->has('tag')) {
-            $tag = $tags->findOneBy(['name' => $request->query->get('tag')]);
-        }
-
+    public function index(
+        int $page,
+        string $_format,
+        PostRepository $posts,
+        #[MapEntity(expr: 'request.query.has("tag") ? repository.findOneBy({"name": request.query.get("tag")}) : null')]
+        ?Tag $tag,
+    ): Response {
         $latestPosts = $posts->findLatest($page, $tag);
 
         // Every template name also has two extensions that specify the format and