Hi Jan,
when are data2 and data3 initialized? They seems to be null when you put
up your models.
Most of the time it's a bad idea to pull something out of a model and
put it back into another model.
Do this instead:
this.add(new MyPanel(id2, new PropertyModel(model, "data2")));
Then in MyPanel:
public MyPanel(id, model){
super(id, new CompoundPropertyModel(model));
This has the following advantages:
- MyPanel's model is always in sync with the model of MyForm.
- MyPanel's usage of CompoundPropertyModel is hidden from the outside.
If MyPanel want's to utilize a CompoundPropertyModel (because it doesn't
set the model on its contained components), it should set it up by itself.
HTH
Sven
On 10/22/2010 06:29 PM, Jan Ferko wrote:
Hi,
I am doing on form which consists of multiple panels and data object
hierarchy to them.
For example:
class Data1 {
Data2 data2;
}
class Data2 {
Data3 data3;
}
class Data3 {
String str;
}
class MyForm extends Form{
public MyForm(id, model){
super(id, model);
this.add(new MyPanel(id2, new
CompoundPropertyModel(this.getModelObject().getData2());
}
}
and very simillar in MyPanel with data3 object, but...
I have problem with updating my data model wicket always throw
WickedMessage:
Attempted to set property value on a null object.
Do anyone know how to solve this?
Thanks for help
Jan Ferko
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