Ruby on Rails

Hi

I'm trying to automaticly update data using a ajax call out of jquery.
When an object gets moved, this code is being executed:

This is my jquery code

$.ajax({        type: "PUT",        url: "/devices/2328.xml",      data: '<device><name>test</name></device>',                contentType: 'application/xml', // format of request payload        dataType: 'html', // format of the response        }); 

My controller looks like this:

  def update      @device = Device.find(params[:id])      if @device.update_attributes(device_params)        respond_with @device      else        render :action => 'edit'      end    end     private      def device_params        params.require(:device).permit(:name)      end

In my log I can see the request comming in, but nothing really happens, see at the bottom Completed 204 No Content
I'm also noticing that the value that I'm passing cannot be found at the parameters part of the log
 

Started PUT "/devices/2328.xml" for 127.0.0.1 at 2014-02-01 19:10:33 +0100  Processing by DevicesController#update as XML    Parameters: {"id"=>"2328"}      Device Load (0.4ms)  SELECT `devices`.* FROM `devices` WHERE `devices`.`id` = 2328 LIMIT 1     (0.1ms)  BEGIN     (0.1ms)  COMMIT  Completed 204 No Content in 9ms (ActiveRecord: 0.6ms)

I can't really figure out what is wrong.

Does anyone have a clue?