> Hi experts,
>
> I want to implement a wizard, user need to input some data, I can do it with
> a single page using form, but I don't know how to do it in wizard, I put a
> couple of input textfield etc. then I get a error:
>
> java.lang.IllegalStateException: Attempt to set model object on null model
> of component: wizard:form:view:expectedNumberOfBoxes
>
> Note: expectedNumberOfBoxes is the first textfield I declared in the java
> class, after googling a few hours(not too much information) I think I need
> to setup a 'model'? but I probably need more details how... my code is like:
>
> public class DeliveryDetails extends WizardStep {
>
>
> public DeliveryDetails(Delivery delivery, String title, String
> content){
> super(title, content);
>
> RequiredTextField expectedNumberOfBoxesTextField = new
> RequiredTextField("expectedNumberOfBoxes", Integer.class);
> add(expectedNumberOfBoxesTextField);
>
> RequiredTextField receivedNumberOfBoxesTextField = new
> RequiredTextField("receivedNumberOfBoxes", Integer.class);
> add(receivedNumberOfBoxesTextField);
>
> }
Yep, you need to work with models. For instance:
RequiredTextField receivedNumberOfBoxesTextField = new
RequiredTextField("receivedNumberOfBoxes", Integer.class, new
PropertyModel(delivery, "receivedNumberOfBoxes"));
add(receivedNumberOfBoxesTextField);
or:
setModel(new CompoundPropertyModel(delivery));
RequiredTextField receivedNumberOfBoxesTextField = new
RequiredTextField("receivedNumberOfBoxes", Integer.class);
add(receivedNumberOfBoxesTextField);
Eelco
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