php - Sending json to symfony controller -

i need pass json data symfony controller. ajax function looks this:

var data = '{"firstname":"john"}'; $.ajax({   type: "post",   url: save_url, //path controller action   data: {json:data}, success: function(response) {      //                 } });  

in controller, try data through:

public function createaction(request $request) {     $data = $this->getrequest()->get('firstname');               return $this->render('mybundle:counter:test.html.twig', array(         'data' => $data               ));  

just see if works, send $data echoed in template. in firebug can see data being sent , seems work, $data empty , nothing echoed. doing wrong?

edit: when check response in fireburg console, se data there, in place, never appears in template. var_dump($data) tells $data null. so, seems data being sent controller ignores it.

as marek noticed:

$this->getrequest() 

already returns request object, you're accessing request property of request, doesn't add up. either try:

$data = $this->request->get('json'); 

or use:

$data = $this->getrequest()->get('json'); 

you can, of course assign return value of $this->getrequest() variable, , call get method on var there on end... anyway, here's initial answer, contain more tips, , considerations may find useful:

you should able data way, though ajax requests + echoing in template? sound bit strange. don't see passing $data variable $this->render call anywhere.

this copy-paste bit controller action in 1 of projects. works fine there:

public function indexaction() {     if (!$this->getrequest()->isxmlhttprequest())     {//check if request ajax request, if not redirect         return $this->redirect(             $this->generateurl('foo_bar_homepage')//changed this, of course         );     }     $id = $this->getrequest()->get('id',false);//works fine 

however, can't begin grasp why you're doing this:

 var data = '{"firstname":"john"}'; 

why not go for:

$.ajax({     type: "post",     url: url,//post how url please...     data: {firstname: 'john'},//jq sort out     success: function(response)     {         console.log(response);     }     error: function()     {         console.log('an error occured');         console.log(arguments);//get debugging!     } }); 

then, in controller you're able to:

$this->getrequest()->get('firstname');//it should john 

you pass {json:{firstname: 'john'}} data param $.ajax, difference in controller be, have this:

$data = $this->getrequest()->get('json'); $firstname = $data['firstname']; 

that should work fine, unless there's somthing you're not telling :)

recap:
i'd write:

public function createaction() {//no request param in controller     if (!$this->getrequest()->isxmlhttprequest())     {//no ajax request, no play...         $this->redirect(             $this->generateurl('homepage_route')         );     }     $data = $this->getrequest()->get('firstname');     //return json response:     return new response(json_encode(array('datareceived' => $data));     //return rendered html page:     return $this->render('mybundle:counter:test.html.twig', array(         'data' => $data               )); } 

of course, js code should read:

$.ajax({       type: "post",       url: 'route/to/create'     data: {firstname:'john'},     success: function(response)     {         console.log(response);     } }); 

i have tested this, , see no reason why shouldn't work. works fine me...