I am getting the following error when i change attributes of a model.
Uncaught Error: <DS.StateManager:ember466> could not respond to event setProperty in state rootState.loading.
Here is the code. http://jsfiddle.net/arenoir/JejwD/ http://jsfiddle.net/arenoir/JejwD/show
Since revision 6 of ember-data (see breaking changes), IDs are string-normalized. As a result, you’ll need to update your fixtures to use strings for IDs (note: the REST adapter will convert numbers/strings, but the fixture adapter doesn’t do any conversions).
Making the following changes to your fixtures seems to get your example working:
See http://jsfiddle.net/dgeb/GVU7n/