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Asked: 2026-06-12T12:13:50+00:00

I’m using wicket version 6. I have a form. as contents of the form,

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I’m using wicket version 6.

I have a form. as contents of the form, I have a FormComponentPanel that contains two DateTimeField‘s (org.apache.wicket.extensions.yui.calendar).

In the class containing the form I have one AjaxButton, and one AjaxLink, both doing the same: reading the models, creating a new object and sending it to some server for processing.

Anyhow,

  • when clicking on the Link my new object is created with the correct values except those newly dates selected with the datepicker

  • when clicking the Button I get some error ([AjaxRequestHandler@1701777932 responseObject [org.apache.wicket.ajax.AjaxRequestHandler$1@3e1]) but no further information on the error

well, I addressed the first issue (Link) with trying to add ajax update behavior to it, as suggested here , but the selected date is not updated in the model

the AjaxButton is created and onSubmit overwritten with just calling another method and target.add(form); also setOutputMarkupId is set to true, but it seems that still something is missing

In order to get it to work I’d just need to solve one of the problems, but it would be great if someone has a solution for both problems. Thanks in advance.

edit

public MyPanelIncludingForm() {
  // ...
  form.add(getRangePanel()); // creates a new TimeRangePanel and returns the instance
  form.add(getSubmitButton());
  // ...
}

private FormComponent<String> getSubmitButton() {
  FormComponent<String> submitBtn = new AjaxButton("submitBtn", form) {
  private static final long serialVersionUID = 3005L;

    @Override
    protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
      System.out.println("submit QT ajax button");
      setResponsePage(HomePage.class);
      sendQuery();
      target.add(form);
    }

    @Override
    protected void onError(AjaxRequestTarget target, Form<?> form) {
      System.err.println("error occurred. " + target);
      target.add(feedback);
    }
  };
  submitBtn.setOutputMarkupId(true);
  return submitBtn;
}

// separate FormComponentModel for timeRange

public class TimeRangePanel extends FormComponentPanel<MyRange> {

MyRange range;
PropertyModel<Date> dpFromPM = new PropertyModel<Date>(this, "range.start");
PropertyModel<Date> dpToPM = new PropertyModel<Date>(this, "range.stop");
public RangePanel(String id, IModel<MyRange> model) {
  super(id, model);

dpFrom = new DateTimeField("dpFrom", dpFromPM) {
  private static final long serialVersionUID = 3006L;

  @Override
  protected DateTextField newDateTextField(String id, PropertyModel<Date> model) {

    DateTextField dtf = super.newDateTextField(id, model);

    AjaxFormComponentUpdatingBehavior a = new AjaxFormComponentUpdatingBehavior("onChange") {
      private static final long serialVersionUID = 3006L;
      @Override
      protected void onUpdate(AjaxRequestTarget target) {
        System.out.println("here u " + dpFrom.getModelObject().toString());
      }
    };
    dtf.add(a);
    return dtf;
  }
};

// second DateTimeField as dpFrom

} // end of constructor

@Override
protected void onBeforeRender() {
  range = getModelObject();
  super.onBeforeRender();
}

} // end of class

edit2

this is what the wicket ajax debug window is printing:

INFO: focus removed from 
INFO: focus set on submitBtn11
INFO: Received ajax response (299 characters)
INFO:
<div wicket:id="feedbackQuery" class="feedback" id="feedbackQuery1c"><wicket:panel>
  <ul wicket:id="feedbackul" class="feedbackPanel">
    <li wicket:id="messages" class="feedbackPanelERROR">
      <span wicket:id="message" class="feedbackPanelERROR"></span>
    </li>
  </ul>
</wicket:panel></div>
INFO: returned focused element: [object HTMLInputElement]
INFO: returned focused element: [object HTMLInputElement]
INFO: Response processed successfully.
INFO: refocus last focused component not needed/allowed
INFO: focus removed from submitBtn11

edit3

As I wrote in a comment:

I removed the re-usable components (FormComponentPanel) and now I don’t get an error with the AjaxButton . anyhow, it’s weird, I thought re-usable components should work, even with Ajax; also the models were assigned properly.

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1 Answer

  1. Editorial Team

    when clicking the Button I get some error
    ([AjaxRequestHandler@1701777932 responseObject
    [org.apache.wicket.ajax.AjaxRequestHandler$1@3e1]) but no further
    information on the error

    => You should run Wicket in DEVELOPMENT mode to get a more detailed trace.

    You might simply add in your form a field called:

    range.start

    range.stop

    and use the Object MyRange as property model instead create a new one for each field.
    There is actually no need for that extra cycle. And I don’t think Wicket will write the information back to the MyRange object if you create new PropertyModels for every attribute.

    For example: http://svn.apache.org/viewvc/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/web/components/admin/users/UserForm.java?view=markup
    Line 276

    and the corresponding HTML
    http://svn.apache.org/viewvc/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/web/components/admin/users/UsersPanel.html?view=markup
    Line 82

    Sebastian

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