validation and json

[noisebreath]

Hi

how can i return a ModelAndView Object to a json call and still let spring fill the form error tags?

	$("#participant_dialog").dialog({
			modal: true,
			buttons: {
				// define the save category handler
				"<spring:message code="btn.save"/>": function() {	
					var obj = $.serializeJSON($("form#participant_form"));		
					$.getJSON("<c:url value='/participant/create.html' />", obj, function(mav) {
						if(mav.modelMap.error){
							var data = mav.modelMap.error;
							alert(print_r(data));
							//add error messages in errors span
							 ?????

greez noise

[noisebreath]

ive added the errors to the mav object

	@RequestMapping(value = "/create", method = RequestMethod.GET)
	public @ResponseBody ModelAndView createEvent(@ModelAttribute("participant") @Valid Participant participant, BindingResult result, HttpServletResponse response){
		ModelAndView mav = new ModelAndView();
		validator.validate(participant, result);  
        if (result.hasErrors()) { 
        	mav.addObject("errors", result.getAllErrors());
        	mav.setViewName("participant_form");
        	return mav;
//        	response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
//        	return null;
        } 
		// calculate password sha-1 hash 
		participant.getAccount().setPassword(passwordEncoder.encodePassword(participant.getAccount().getPassword(), null));		
		// save the participant
		Session session = HibernateUtil.getInstance().getCurrentSession();
		session.save(participant);
		mav.addObject(participant);
		return mav;
//		return participant;
	}

now i can get the errors and distinguish whether everything is oki or not:

$("#participant_dialog").dialog({
			modal: true,
			buttons: {
				// define the save category handler
				"<spring:message code="btn.save"/>": function() {	
					var obj = $.serializeJSON($("form#participant_form"));		
					$.getJSON("<c:url value='/participant/create.html' />", obj, function(mav) {
						if(mav.modelMap.errors){
							alert("error");
						}else{
							var values = new Array();
							values[0] = mav.participant.title;
							values[1] = mav.participant.firstName;
							values[2] = mav.participant.lastName;
							values[3] = mav.participant.email;
							values[4] = mav.participant.phone;
							var rtn = table.fnAddData(values);
					        var trAdded = table.fnGetNodes(rtn);
					        $(trAdded).attr("id", mav.participant.id);
					        $(trAdded).click(clickRow);			
						}
					});				
					$(this).dialog("close");					
				},
				// define the cancel dialog handler
				"<spring:message code="btn.cancel"/>": function() {
					$(this).dialog("close");
				}
			}		
		});

But i still dont now how to fill the error tags of the former form...

anybody?

[noisebreath]

have simplified the question