how to call spring controller @RequestMapping from another action method passing form object along with the call

Question

I need to call another @RequestMapping from inside of a spring controller. Now I can easily do it by

    return "redirect:anotherMapping.htm";

But the I need to pass value in form object as well.

    @RequestMapping("/anotherMapping")
    public ModelAndView addUser(final @ModelAttribute("userLogin") UserLogin 
    userLogin, final HttpServletRequest request){

I need to pass userId in UserLogin. If I write return "redirect:anotherMapping.htm";, then it invokes this controller method but form object is null.

Please help.

Solution

You can use RedirectAttributes.

In below example, when foo is invoked and redirects to /bar, the model will contain xyz=meow attribute.

@RequestMapping(..)
public String foo(RedirectAttributes redir) {
  redir.addFlashAttribute("xyz", "meow");
  return "redirect:/bar";
}

@RequestMapping("/bar")
public String bar(Model model) {
  ..
}

If you find doing this too many time you might also consider using @SessionAttributes

Comments

[Sotirios Delimanolis]

Look into RedirectAttributes.

[Rey Libutan]

Is it within the same controller?

[romil gaurav]

I think there is no way to pass the form object too in the controller, is it?

[romil gaurav]

'i think this will definately help. I know I could use session or static variable to set the id and then set it explicitly in the form object, but those were not the best methodology. Also I think there is no way to pass the form object too in the controller, is it? Thanks bro for the help.

[gerrytan]

What do you mean "there is no way to pass the form object too in the controller"? You can use @ModelAttribute and @SessionAttribute