validation in form

src/Form/RoomType.php

@@ -4,15 +4,24 @@ namespace App\Form;
 
 use App\Entity\Room;
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints\Length;
+use Symfony\Component\Validator\Constraints\Regex;
 
 class RoomType extends AbstractType
 {
     public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
-            ->add('name')
+            ->add('name', TextType::class, [
+                'required' => true,
+                'constraints' => [
+                    new Length(['min' => 3]),
+                    new Regex('/^[a-zA-Z0-9]*$/')
+                ],
+            ])
         ;
     }