Re: LoadableDetachableModel and Attempt to set model object on null model of component
Ok I eventually made it work.
I have to use a Model for *both* the provided values, AND the selected
object (sorry, I'm a Wicket newbie).
Thus, by adding a field to the page:
public CompanyConfiguration selectedCompany;
And then:
ChoiceRendererCompanyConfiguration choiceRenderer = new
ChoiceRendererCompanyConfiguration(name, id);
DropDownChoiceCompanyConfiguration ddc = new
DropDownChoiceCompanyConfiguration(companiesList,
new PropertyModelCompanyConfiguration(this,
selectedCompany),
new
LoadableDetachableModelListlt;CompanyConfiguration() {
@Override
protected ListCompanyConfiguration
load() {
final
ListCompanyConfiguration configs = getCompaniesList();
Collections.sort((ListCompanyConfiguration) configs, new
ComparatorCompanyConfiguration() {
@Override
public int
compare(CompanyConfiguration o1, CompanyConfiguration o2)
{
return
o1.getName().compareTo(o2.getName());
}
});
return configs;
}
@Override
public void detach() {
}
}, choiceRenderer);
But in my case, this leads to a serialization issue, so again we have to use
a LoadableDetachableModel:
DropDownChoiceCompanyConfiguration ddc = new
DropDownChoiceCompanyConfiguration(companiesList,
new
LoadableDetachableModelCompanyConfiguration() {
@Override
protected CompanyConfiguration load() {
return null;
}
},
new
LoadableDetachableModelListlt;CompanyConfiguration() {
@Override
protected ListCompanyConfiguration
load() {
final
ListCompanyConfiguration configs = getCompaniesList();
Collections.sort((ListCompanyConfiguration) configs, new
ComparatorCompanyConfiguration() {
@Override
public int
compare(CompanyConfiguration o1, CompanyConfiguration o2)
{
return
o1.getName().compareTo(o2.getName());
}
});
return configs;
}
@Override
public void detach() {
}
}, choiceRenderer);
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LoadableDetachableModel and Attempt to set model object on null model of component
I got a /Unexpected RuntimeException Last cause: Attempt to set model object
on null model of component: form:companiesList/ whenever I select an item in
my DropDownChoice.
I read somewhere that it was because there is no Model set, but there *is*
one (a LoadableDetachableModel) :
ChoiceRendererCompanyConfiguration choiceRenderer = new
ChoiceRendererCompanyConfiguration(name, id);
DropDownChoiceCompanyConfiguration ddc = new
DropDownChoiceCompanyConfiguration(companiesList,
new
LoadableDetachableModelListlt;CompanyConfiguration() {
private static final long serialVersionUID =
8752933117323402630L;
@Override
protected ListCompanyConfiguration load() {
final ListCompanyConfiguration
configs = getCompaniesList();
Collections.sort((ListCompanyConfiguration) configs, new
ComparatorCompanyConfiguration() {
@Override
public int
compare(CompanyConfiguration o1, CompanyConfiguration o2) {
return
o1.getName().compareTo(o2.getName());
}
});
return configs;
}
}, choiceRenderer) {
protected boolean wantOnSelectionChangedNotifications() {
return true;
}
protected void onSelectionChanged(final CompanyConfiguration
newSelection)
{
logger.debug(Selected base: + newSelection.getId());
}
};
Has anyone an idea about what I'm doing wrong?
Note: I cannot serialize my CompanyConfiguration list.
BTW, second question: there is a DataView with a ListDataProvider elsewhere
in the page. How can I update its values from the method
onSelectionChanged() above?
Thanks a lot!
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DataTable and unserializable data
Is it possible to use an implementation of DataTable (like
AjaxFallbackDefaultDataTable) with unserializable data?
My page throws the usual NotSerializableException, in spite of using
LoadableDetachableModel everywhere I can.
I am tearing my hair out to understand where the problem comes from. Can
someone please help?
Thanks.
I want to precise that I use a LoadableDetachableModel in the method model()
of my DataProvider:
@Override
public IModelApplication model(final Contact object) {
return new LoadableDetachableModelContact() {
@Override
protected Contact load() {
return object;
}
};
}
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Re: DataTable and unserializable data
A thousand thanks, Sebastian! Your sample did it! Juste a last question, out of curiosity (if you have a clue): Did this exception occur because DataTable, after retrieving the user objects from the provider, *stores* them somewhere in an inner component? And so when the Page is serialized, the DataTable is too, and my objects Contact as well? Because then I am wondering the point for a DataTable to memorize the user data... I would expect it to iterate on them, display, and then get rid of them, transiently... -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/DataTable-and-unserializable-data-tp4659659p4659678.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
