Hi,
Have you tried using an expression as the name of your Label component which
match your object model hierarchy.
i.e:
add(new Label("smallObject.name"));
Willis Blackburn wrote:
>
> Hello,
>
> I have a situation that keeps coming up. All of my solutions have
> seemed clumsy, which makes me think that there's a better way of
> approaching this that I just haven't figured out. Can someone point
> me in the right direction?
>
> What I want is to have a Page that uses CompoundPropertyModel, and
> then include a component on that page that also uses
> CompoundPropertyModel. So roughly it looks like this:
>
> public class BigObject {
> public SmallObject get SmallObject() { ... }
> }
>
> public class SmallObject {
> public String getName() { ... }
> }
>
> public class BigPage {
> public BigPage(BigObject object) {
> setModel(new CompoundPropertyModel(object));
> add(new SmallComponent("smallObject"));
> }
> }
>
> public class SmallComponent {
> public SmallComponent() {
> add(new Label("name"));
> }
> }
>
> If I try to do just this, then I get an error because the label that's
> part of SmallComponent finds the BigPage model and fails because
> there's no property of BigObject called name.
>
> So obviously SmallComponent needs some model:
>
> public class SmallComponent {
> public SmallComponent(IModel model) {
> setModel(new CompoundPropertyModel(model));
> add(new Label("name"));
> }
> }
>
> But what model to give it? I tried passing it new
> ComponentPropertyModel("smallObject"), which didn't work because
> ComponentPropertyModel implements IComponentAssignedModel and thus
> can't be directly wrapped in CompoundPropertyModel. Adding a call to
> wrap() in the SmallComponent constructor fixed the problem, but I'm
> not sure if I can just call wrap and carry on or if there will be some
> unforeseen consequence of that down the road. Is there a standard way
> of doing this?
>
> Thanks,
> Willis
>
>
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