Amine Achalhi Amine Achalhi - 4 months ago 11
Ajax Question

symfony Response with json ajax

I'm new in Symfony i wanted to do some manipulation such I can get a list of all elemets in the entity Theme via Ajax but the answer is still "undefined" Here the code text strong


$(document).ready(function () {
var $theme = $('#theme');
$theme.append('<option value="">Choisir un thème</option>');
type: 'post',
url: '{{ path('web_site_liste_theme_cmb') }}',
dataType: 'json',
beforeSend: function () {
$('#themediv').append('<div id="loading" style=" float: left; display: block;"><img src="{{ asset('bundles/BackBundle/img/loadingicon.gif') }}"/></div>');
success: function (json) {
{#$('#theme').append({{ dump(json)}});#}
$.each(json, function (index, value) {

$('#theme').append('<option value="' + + '">' + + '</option>');


public function ListeThemeAction(Request $request)

$em = $this->getDoctrine()->getEntityManager();
if ($request->isXmlHttpRequest()) {
$themes = $em->getRepository('WebSiteBackBundle:theme');
$themes = $themes->findAll();

return new JsonResponse($json);
return new JsonResponse('no results found', Response::HTTP_NOT_FOUND); // constant for 404


the server response is 200 OK, everything seems to work, I have the same number of data in the database but I can't read the objects values

and here is the :


There is many ways to do that, I show you one of them.

First, prepare you data to send from controller and returns a JsonResponse instance with you data:

public function fooAction()
    $data = ['foo1' => 'bar1', 'foo2' => 'bar2'];

    return new JsonResponse($data); //or $this->json($data) since Symfony3 

Second, use the same data structure to access from Javascript callback function:

$.post('{{ path('web_site_liste_theme_cmb') }}', function (data) {
    console.log(data['foo1']); //output bar1
    console.log(data.foo2);    //output bar2 

The JsonResponse tells the browser that data sent must be interpreted as JSON, otherwise these data are interpreted as plain/text by default.

In your question your data sent was the array of objects, so you needs loop for this variable "json" (array) and access to each property of object.