InvalidBasesError: Cannot resolve bases for []

Question

When I run tests I get this error during database initialization:

django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [

        

Answer 1

One possibility is that the deleting or creating of a model in the migration file is in the wrong order. I experienced this in Django 1.7.8 when the base model was BEFORE the derived model. Swapping the order for deleting the model fixed the issue.