I have a bug in my Symphony Controller Replay

Question

My goal is this, in my Form there is an attempt to send in one of the fields that was empty, something like this. V

Example -> https://i.stack.Imgur.com/Hiof9.gif

exepction - https://imgur.com/a/3j5JF2Y

Controler V

<?php
// src/Controller/DefaultController.php
namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Form\Extension\Core\Type\DateType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\Extension\Core\Type\EmailType;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\JsonResponse;

class DefaultController extends AbstractController
{
    public function index(Request $request)
            {
                $array[] = [
                    "text" => "Band"];
                $array[] = [
                    "text" => "Tour",];
                $array[] = [
                    "text" => "Contact",];
                $array[] = [
                    "text" => "Merchandaise",];

                $form = $this->createFormBuilder()
                            ->add('name', TextType::class,array(
                                'required'=>false,
                        'attr'=> ['class' => 'w3-input w3-border']))
                            ->add('email', EmailType::class,array(
                                'required'=>false,
                        'attr'=> ['class' => 'w3-input w3-border']))
                            ->add('message', TextareaType::class,array(
                                'required'=>false,
                        'attr'=> ['class' => 'w3-input w3-border']))
                            ->add('send', SubmitType::class,array(
                        'attr'=> ['class' => 'w3-input w3-border w3-button w3-black w3-section w3-right']))
                            ->getForm();

                    return $this->render('body.html.twig' , [
                    'arrays' => $array,
                    'form' => $form->createView(), 
                ]);
           }

    public function indexN2(Request $request)
        {
            $form = $this->createFormBuilder()
            ->add('name', TextType::class,array(
        'attr'=> ['class' => 'w3-input w3-border']))
            ->add('email', EmailType::class,array(
        'attr'=> ['class' => 'w3-input w3-border']))
            ->add('message', TextareaType::class,array(
        'attr'=> ['class' => 'w3-input w3-border']))
            ->add('send', SubmitType::class,array(
        'attr'=> ['class' => 'w3-input w3-border w3-button w3-black w3-section w3-right']))
            ->getForm();

            $form->handleRequest($request);

                if ($form->isSubmitted() && $form->isValid()) 
                {  

                $name = $form["name"]->getData();
                $email = $form["email"]->getData();
                $message = $form["message"]->getData();
                $error = array();

                if(!$name)
                    $error[] = 'name';

                if (count($error > 0))
                {
                return new JsonResponse(array(
                        'status' => 0,
                        'data' => $error,
                    ));
                }
                    $response = 'array';
                }    
                return new JsonResponse(array(
                        'name' => $name,
                        'email' => $email,
                        'message' => $message,
                    ));        
        }
}
``````````````


Ajax V
``````````````

  $("form").submit(function(e) {

    e.preventDefault(); // avoid to execute the actual submit of the form.

    console.log('pppppp->'+$(this).serialize())
    $.ajax({
           type: "POST",
           url: 'index2',
           data: $(this).serialize(), // serializes the form's elements.
           success: function(data)
           {
                console.log(data);
           }
         });
});


`````````````

Answer 1

Your validation is not working because the function count also counts empty elements of an array.

$array = array("" => "");
echo count($array);
// Saída: 1

---

You can improve your validation in two ways.

Using the function array_filter to "filter" the array where this takes two parameters, the array and a callback.

When callback is omitted all array entries equal to FALSE will be removed.

if (count(array_filter($error) > 0)) {
    return new JsonResponse(array(
        'status' => 0,
        'data' => $error,
    ));
}

Or use the function Empty to validate an array, which in my opinion I think is more advisable.

if (!empty($error)) {
    return new JsonResponse(array(
        'status' => 0,
        'data' => $error,
    ));
}

Notice that using the empty its validation becomes less and more explicit.