According to the doco the default form processing behavior is executed for
AjaxButton and AjaxSubmitButton (in fact AjaxSubmitButton appears to be
deprecated - behaves the same as AjaxButton anyway?).
I am using AjaxButton.
I actually don't care about the selections but rather, the entries that the
user has added to the list (whether selected or not) which is why I call
getChoices() rather than getConvertedInput()
The button code is:
AjaxButton addBtn = new AjaxButton("add") {
@Override
protected void onSubmit(AjaxRequestTarget target, Form form) {
update(target, selectedAvailableSets, availableSetsList,
targettedSetsList);
}
@Override
protected void onError(AjaxRequestTarget target, Form form) {
}
};
addBtn.setOutputMarkupId(true);
add(addBtn);
-----Original Message-----
From: Clint Checketts [mailto:checke...@gmail.com]
Sent: Monday, 2 May 2011 2:28 PM
To: users@wicket.apache.org
Subject: Re: How to fail validation if ListMultipleChoice is empty
You are correct that the Form's validation should only fire when submitting
the form. When an individual element is updated via ajax (as in an
AjaxFormComponentUpdatingBehavior) then just the processing and validations
steps are fired for the individual form component.
It makes me wonder if you are using an AjaxSubmitButton instead of just an
AjaxButton. (Or similarly an AjaxSubmitLink instead of an AjaxLink) Mind
including your button's code?
Also, why are you calling getChoices() instead of getConvertedInput() in the
validator? Choices represent the possible selection options, the converted
input is the value of the selected choices.
-Clint
On Sun, May 1, 2011 at 9:25 PM, Coleman, Chris <
chris.cole...@thalesgroup.com.au> wrote:
> Yes, it's all via AJAX.
>
> In the last few minutes I've tried a different approach and it works ok but
> it introduces another problem:
>
> form.add(new AbstractFormValidator()
> {
> public FormComponent[] getDependentFormComponents()
> {
> return null;
> }
>
> public void validate(Form<?> form)
> {
> List sets = targettedSetsList.getChoices();
>
> if ( sets.size() == 0 ) {
> targettedSetsList.error((IValidationError)new
> ValidationError().addMessageKey("error.noSetSpecified"));
> }
> }
> });
>
> This accurately detects when nothing is in the list and displays an error
> message but once emptied we can not add new elements to the list because the
> validation is also executed when the 'add' button is pressed. The validation
> fails because the list is empty so the 'add' fails, making it impossible to
> add new elements when the list is empty.
>
> I thought validation would only occur when the user submits the form but it
> appears to be fired off whenever the user presses the 'add' button. Is this
> to be expected?
>
>
> -----Original Message-----
> From: Clint Checketts [mailto:checke...@gmail.com]
> Sent: Monday, 2 May 2011 12:10 PM
> To: users@wicket.apache.org
> Subject: Re: How to fail validation if ListMultipleChoice is empty
>
> Lets see the code about 'adding elements by pressing on a button'. The
> 'getValue()' method is returning the value from the list box's HTTP
> submitted values, if the add button is submitting values via ajax or some
> other means then it may need a different approach.
>
> -Clint
>
> On Sun, May 1, 2011 at 8:15 PM, Coleman, Chris <
> chris.cole...@thalesgroup.com.au> wrote:
>
> > We have an app that allows people to add elements to a ListMultipleChoice
> > by pressing on a button. We want the form to fail validation if the
> > ListMultipleChoice contains no elements.
> >
> > I've tried this:
> >
> > targettedSetsList.add(new IValidator()
> > {
> > public void validate(IValidatable validatable) {
> > // Always contains no items - strange
> > Collection list = (Collection)validatable.getValue();
> >
> > if ( list.size() == 0 ) {
> > ValidationError ve = new ValidationError();
> > ve.setMessage("No sets have been specified for deployment");
> > validatable.error(ve);
> > }
> > }
> > });
> >
> > but at validation the list.size() is always 0 even if the user has added
> > elements. Am I doing it the right way? Is there a better way?
> >
> >
> >
> >
> >
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