Re: [Rails-devel] Some (multi-)undo related bugs

[Erik V. <eri...@xs...>]

Post-merge, perhaps it makes sense to have certain Model objects have
an Observable property?

e.g. bool isObservable = True

[EV]
ModelObject extends Observable - being observable is integral to, and the
sole reason for the existence of ModelObjects.
State extends ModelObject - that's a bonus for State objects: that they can
be observed. But not all are. So not all ModelObjects are in fact observed. 

Or, maybe it doesn't matter, and the UI simply uses the Model objects
that make sense, and doesn't use the ones it doesn't need and there's
really no difference between them at all. :-)

[EV] So that's in fact already the case. But the point was, that not all
ModelObjects have state, and the question is: should that change?

Erik.