Dear All I use JDO with spring and when i add @ModelAttribute("countries") All things go fine except the data not saved without any exception When query from another datastore
@Controller public class PortController { private static final String FORM_MODEL_KEY = "ports"; private static final String FORM_UPDATE_KEY = "port/Edit"; private static final String REDIRECT_LIST_VIEW_KEY = "redirect:/port/ home.htm" ; @Autowired private PortDAO portDAO; @Autowired private CountryDAO countryDAO; public PortController() {} @InitBinder protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception { binder.registerCustomEditor(String.class, new StringTrimmerEditor(false)); binder.registerCustomEditor (com.xesolution.domain.Country.class, new CountryEditor(countryDAO)); } @RequestMapping(value="/port/home.htm") public ModelMap list() { return new ModelMap(FORM_MODEL_KEY,portDAO.readAll()); } @RequestMapping(value="/port/new.htm") public ModelAndView create(){ Port port = new Port(); return new ModelAndView(FORM_UPDATE_KEY,FORM_MODEL_KEY,port); } @RequestMapping(value="/port/update.htm") public ModelAndView update(@RequestParam("id") String id) { Port result = portDAO.read(id); return new ModelAndView(FORM_UPDATE_KEY,FORM_MODEL_KEY, result); } @RequestMapping(value="/port/save.htm", method = RequestMethod.POST) public ModelAndView save(@ModelAttribute(FORM_MODEL_KEY) Port port, BindingResult result, SessionStatus status) { new PortValidator().validate(port, result); if (result.hasErrors()) { return new ModelAndView(FORM_UPDATE_KEY, FORM_MODEL_KEY, port); } else { portDAO.persist(port); return new ModelAndView(FORM_UPDATE_KEY, FORM_MODEL_KEY, port); return new ModelAndView(REDIRECT_LIST_VIEW_KEY, list()); } } @ModelAttribute("countries") public List<?> populateCountry() { //this make data not saved return countryDAO.readAll(); //But this make the data saved //return portDAO.readAll(); } public void setPortDAO(PortDAO portDAO) { this.portDAO = portDAO; } } and this is jsp line which display the form select <form:select path="country" items="${countries}" itemLabel="name" itemValue="id"/> -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=.