I have a form which extends wicket form:
MyForm extends Form
In the constructor, I have this line:
super(formId, new CompoundPropertyModel(new SignUpFormModel()));
SignUpFormModel is a Java class that contains my form fields. After the
super call, i add the components:
fc = new RequiredTextField("userName");
fc.add(StringValidator.minimumLength(4));
fc.setLabel(new Model("User name"));
fc.add(new AjaxFormComponentUpdatingBehavior("onChange") {
protected void onUpdate(AjaxRequestTarget target) {
}
});
add(fc);
fc = new Button("checkId");
fc.add(new AjaxFormComponentUpdatingBehavior("onClick") {
protected void onUpdate(AjaxRequestTarget target) {
// this works
String userName =((SignUpFormModel)
getComponent().getParent().getModelObject()).getUserName();
// this doesn't work
//String userName =((SignUpFormModel)
getComponent().getModelObject()).getUserName();
if(userInfoService.checkIsUniUsername(userName))
getComponent().info("User Id is
available.");
else
getComponent().error("User Id is
unavailable.");
target.addComponent(((SignUpWindow)
getComponent().getPage()).getFeedback());
}
});
add(fc);
All that code is inside my form class. I think I see what you mean, when i
create my form component, i don't pass in a model to it. I pass in my model
to the form instead.
Could you suggest a best approach on how to do this? If I want to pass in a
model for the component, do I just pass in my form model when i do a new
form component?
igor.vaynberg wrote:
>
> you most likely did not give the formcomponent a model.
>
> paste the relevant code
>
> -igor
>
>
> On 4/28/07, wicket0123 <[EMAIL PROTECTED]> wrote:
>>
>>
>>
>> when i use getformcomponent.getmodleobject inside the onupdate, it throws
>> nullpointer exeption. see code below,
>>
>> ((SignUpFormModel) getFormComponent().getModelObject()).getUserName()
>>
>> If I use this, i have no problem:
>>
>> ((SignUpFormModel)
>> getComponent().getParent().getModelObject()).getUserName();
>>
>> Not sure if this is a bug on wicket or my code...
>>
>>
>>
>> igor.vaynberg wrote:
>> >
>> > if you use wicket validators and the component is invalid the onerror()
>> > will
>> > be called instead of onupdate()
>> >
>> > the value is available via getformcomponent().getmodelobject() inside
>> > onupdate()
>> >
>> > -igor
>> >
>> >
>> > On 4/27/07, wicket0123 <[EMAIL PROTECTED]> wrote:
>> >>
>> >>
>> >> I want to use ajax to check if a field value is valid w/o submitting
>> the
>> >> entire form. I add AjaxFormComponentUpdatingBehavior to my ajax
>> object
>> >> (link/button/etc). But, I don't know how to retrieve the edit field's
>> >> value
>> >> inside the onUpdate method. See the code I have:
>> >>
>> >> fc = new RequiredTextField("userName");
>> >> fc.setLabel(new Model("User Name"));
>> >> add(fc);
>> >>
>> >> fc = new Button("checkId");
>> >> fc.add(new
>> AjaxFormComponentUpdatingBehavior("onClick")
>> {
>> >> protected void onUpdate(AjaxRequestTarget
>> target)
>> >> {
>> >>
>> >> System.out.println("This gets
>> called");
>> >>
>> >> // TODO: how to get the userName
>> field's
>> >> value?
>> >>
>> >>
>> >> }
>> >> });
>> >>
>> >> add(fc);
>> >> --
>> >> View this message in context:
>> >>
>> http://www.nabble.com/how-to-get-a-form%27s-field-when-i-click-on-an-ajax-object-tf3660473.html#a10228341
>> >> Sent from the Wicket - User mailing list archive at Nabble.com.
>> >>
>> >>
>> >>
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