How to submit form ajax in symfony2?

Question

I am about to submit my form Using Ajax,i have successfully submit my form using POST but don't know how to use Ajax with Symfony

builform

    $builder->add('name', 'text', array('constraints' => array(new NotBlank()), 'attr' => array('placeholder' => 'Name')))
        ->add('gender', 'choice', array('empty_value' => 'Select Gender', 'constraints' => array(new NotBlank()), 'choices' => \AppBundle\Entity\Records::$gender_list, "required" => true))
        ->add('dateOfBirth', 'birthday', array('label' => 'Date Of Birth','required'=>true))
        ->add('image_path', 'file', array('label' => ' ','required'=>false, 'data_class' => null, 'constraints'=>array(new Assert\File(                                             array('mimeTypes'=>$mime_types, 'maxSize'=>'2048k' )))))
        ->add('country_of_birth', 'entity', array('empty_value' => 'Country of Birth',
            'class' => 'AppBundle\Entity\Location',
            'property' => 'country',
            'label' => 'Country of Birth'
        ))
        ->add('religion', 'entity', array('empty_value' => 'Select Religion',
            'class' => 'AppBundle\Entity\Religion',
            'property' => 'name',
            'label' => 'Religion'
        ));

Action

        $success = false;
        $record_rep = new \AppBundle\Entity\Records();
        $form = $this->createForm(new \AppBundle\Form\AddPersonType(), $record_rep);

        if ($this->getRequest()->getMethod() == 'POST') {
            $form->submit($request);
            if ($form->isValid()) {
                $data = $form->getData();
                $file = $data->getImagePath();
                $image = $file->getClientOriginalName();

                $new_image_name = $this->hanldeUpload($image, $file);
                $this->savetoDB($data, $record_rep, $new_image_name);
                $success = true;
            }
        }
        return $this->render('AppBundle:Homepage:add_person_form.html.twig', array('form' => $form->createView(), 'success'=>$success ));
    }

Answer 1

With jQuery, use serialize() the form and post it to your route.

$('#form').submit(function(e) {

    e.preventDefault();
    var url = "{{ path('YOUR_PATH') }}";
    var formSerialize = $(this).serialize();
    
    $.post(url, formSerialize, function(response) {
        //your callback here
        alert(response);
    }, 'JSON');
});

In your action

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

....

  // or return new JsonResponse($anyData);
  return new Response(json_encode(['status'=>'success']));
}

it must be ok like this. but you can add some parameters like the format, methods etc... in your routing.