Apache Isis: @Property(editing = Editing.ENABLED) doesn't work for ViewModels

I added a property to ViewModel and marked it with Editing.ENABLED.

@DomainObject(
        nature = Nature.VIEW_MODEL,
        objectType = "homepage.HomePageViewModel"
)
public class HomePageViewModel {

    @Setter @Getter
    @Property(editing = Editing.ENABLED)
    private String editableField;

}

But this field is not editable on UI:

But it works fine for SimpleObject:

Does it work correctly for ViewModel? Maybe ViewModel shouldn't have any properties?

No, it isn't working correctly for view models... the framework is meant to support this.

The good news is that there is a workaround. If you annotate the class to use the (more flexible) JAXB-style of view model, then it all works as expected.

Here's an updated version of the class; look for annotations starting @Xml...:

@XmlRootElement(name = "compareCustomers")
@XmlType(
    propOrder = {
            "editableField"
    }
)
@XmlAccessorType(XmlAccessType.FIELD)
public class HomePageViewModel {

    @XmlElement(required = true)
    @Setter @Getter
    @Property(editing = Editing.ENABLED)
    private String editableField;

    public TranslatableString title() {
        return TranslatableString.tr("{num} objects", "num", getObjects().size());
    }

    public List<SimpleObject> getObjects() {
        return simpleObjectRepository.listAll();
    }

    @XmlTransient
    @javax.inject.Inject
    SimpleObjectRepository simpleObjectRepository;
}

For more on JAXB view models, see the user guide.

Meantime I've raised a JIRA ticket for the issue you've discovered,