Fix fields and add warning on content too long

src/Entity/Comment.php

@@ -5,6 +5,7 @@ namespace App\Entity;
 use Doctrine\ORM\Mapping as ORM;
 use App\Repository\CommentRepository;
 use Gedmo\Mapping\Annotation as Gedmo;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * @ORM\Entity(repositoryClass=CommentRepository::class)
@@ -20,8 +21,12 @@ class Comment
     private $id;
 
     /**
-     * @ORM\Column(type="text")
+     * @ORM\Column(type="text", length=65535)
      * @Gedmo\Versioned
+     * @Assert\Length(
+     *     max=65535,
+     *     maxMessage="Content too long : {{ limit }} max"
+     * )
      */
     private $content;