Wicket setResponsePage calls constructor multiple times

Question

Trying to pass a model from one page to another. Application.init getRequestCycleSettings().setRenderStrategy(RequestCycleSettings.RenderStrategy.ONE_PASS_RENDER)

I have two pages, both defined with 3 constructors each. PageOne has a form. OnSubmit is supposed to pass the page model from PageOne to PageTwo.

The call to setResponsePage first calls the constructor WebPage​(IModel<?> model) and passes the model, as expected.

But immediately after that, it also calls the WebPage​() (noargs) and the WebPage​(PageParameters parameters) constructor. As a result, PageTwo gets constructed 3 times and ends up having a null DefaultModel.

How can i tell Wicket to stop after calling the WebPage​(IModel<?> model) contructor?

Here is the code:

public class PageOne extends WebPage {
    // Similar constructors for PageTwo
    public PageOne() {
        super();
    }

    public PageOne(PageParameters p) {
        super(p);
    }

    public PageOne(IModel<?> model) {
        super(model);
    }

   @Override
   protected void onInitialize() {
       super.onInitialize();

       Form<Void> form = new Form<Void>("form") {
           @Override
           public void onSubmit() {
               setResponsePage(new PageTwo((IModel<?>)getDefaultModel()));
           }
      };
   }
}

Thank you

Wicket version is 9.13.0

Application is a Springboot App (springboot version 2.7.11), in case that matters.

I expect setresponsePage to call the right constructor only once and pass the model.

Answer 1

I expect setresponsePage to call the right constructor only once and pass the model.

Me too! But I need to debug it to see why this happens.

You could try with:

@Override
public void onSubmit() {
    throw new RestartResponseException(new PageTwo((IModel<?>)getDefaultModel()));
}