<Model>, which has either not been installed or is abstract.

[erikcw]

I just upgraded from django-fsm 1.6 to 2.1 and now get this error when trying to run any management command:

CommandError: One or more models did not validate:
anx.dimensioncre: 'cre' has a relation with model portal.Cre, which has either not been installed or is abstract.

The only change I made was upgrading from django-fsm 1.6. The changelog says something about the release being backwards incompatible -- but doesn't document an upgrade procedure.

I'm running Django 1.6.5.

[kmmbvnr]

I have no ideas what it could be. For migrating to new django_fsm you should just change imports. And import everything directly from django_FSM package.

[kmmbvnr]

Did you change imports?

[erikcw]

I hadn't changed the imports. Changing them fixed the issue.

Thought now I get a TypeError: transition() got an unexpected keyword argument 'save' traceback. What is the recommended pattern for moving save=True? Should a call to self.save() be placed inside the transition method?

[kmmbvnr]

Yep, explisit save() call is better