Dynamic List binding Javascript to spring (LazyList)

[John Lintini]

Ok I have been searching this topic for a couple of days now. I have seen pages from Matt Fleming about using a lazylist so that if I add a row to a form from the client side (javascript) it will add to the end of the lazylist....my issue is that Im not sure how to exactly get the form fields added by javascript to bind via spring. Can anybody help me out or point me in the right direction? Thanks

[Dharmveer Jain]

Hi,

Did you got solution to this problem? I am also facing the same issue. Appreciate if you can share the solution.

Thanks

[Alaa Nassef]

You can take a look here and here

[Lorand Komaromi]

Alaa Nassef wrote: You can take a look here and here

John Lintini wrote:I have seen pages from Matt Fleming about using a lazylist

[Alaa Nassef]

Sorry, Didn't see the part about you already seeing the Matt Flemming pages. Anyway, you have to create a wrapper for the lazylist, and a model attribute, and spring will do the binding for you. For example

public class LazyLibrary {
  private List<LibraryEntry> library;

  public List<LibraryEntry> getLibrary() {
    return library;
  }

  public void setLibrary(List<LibraryEntry> list) {
    library = list;
  }

  @SuppressWarnings("unchecked")
  public LazyLibrary() {
	  library = LazyList.decorate(new ArrayList<LibraryEntry>(), new Factory() {
          public Object create() {
              return new LibraryEntry();
          }
      });
  }
}

And in your controller

	@ModelAttribute("lazyLib")
	public LazyLibrary populateLazyLibFromDB() {
		return new LazyLibrary();
	}

	@RequestMapping(value = "/libraryform", method = RequestMethod.POST)
	public ModelAndView setupPost(@ModelAttribute("lazyLib") LazyLibrary lazyLib, ModelMap modelMap, HttpServletRequest request) {
	saveLibraryEntries(lazyLib,request,modelMap);

	return new ModelAndView("redirect:librarylist");
	}

Code very similar to the one above is working fine in my project