Add class parameter for references

Author: rosier

src/DataFixtures/AppFixtures.php

@@ -48,6 +48,7 @@ private function loadUsers(ObjectManager $manager): void
             $user->setRoles($roles);
 
             $manager->persist($user);
+
             $this->addReference($username, $user);
         }
 
@@ -60,6 +61,7 @@ private function loadTags(ObjectManager $manager): void
             $tag = new Tag($name);
 
             $manager->persist($tag);
+
             $this->addReference('tag-'.$name, $tag);
         }
 
@@ -80,7 +82,7 @@ private function loadPosts(ObjectManager $manager): void
 
             foreach (range(1, 5) as $i) {
                 /** @var User $commentAuthor */
-                $commentAuthor = $this->getReference('john_user');
+                $commentAuthor = $this->getReference('john_user', User::class);
 
                 $comment = new Comment();
                 $comment->setAuthor($commentAuthor);
@@ -140,7 +142,7 @@ private function getPostData(): array
             // $postData = [$title, $slug, $summary, $content, $publishedAt, $author, $tags, $comments];
 
             /** @var User $user */
-            $user = $this->getReference(['jane_admin', 'tom_admin'][0 === $i ? 0 : random_int(0, 1)]);
+            $user = $this->getReference(['jane_admin', 'tom_admin'][0 === $i ? 0 : random_int(0, 1)], User::class);
 
             $posts[] = [
                 $title,
@@ -262,7 +264,7 @@ private function getRandomTags(): array
 
         return array_map(function ($tagName) {
             /** @var Tag $tag */
-            $tag = $this->getReference('tag-'.$tagName);
+            $tag = $this->getReference('tag-'.$tagName, Tag::class);
 
             return $tag;
         }, $selectedTags);