"ModuleNotFoundError: No module named 'django.utils.six'" with Django 3.0

[philgyford]

I'm in the process of updating my project to Django 3.0 but using sortedm2m I get:

  File "/Users/phil/Projects/personal/django-ditto/.tox/py38-django30/lib/python3.8/site-packages/sortedm2m/forms.py", line 10, in <module>
    from django.utils.six import string_types
ModuleNotFoundError: No module named 'django.utils.six'

Django 3.0 drops support for python 2 compatibility APIs, so I guess sortedm2m either needs to drop support for python 2, or explicitly include a non-Django instance of six?

[cqxu]

if use whitenoise, try to upgrade whitenoise:
pip install whitenoise --upgrade

[clintonb]

This was resolved by #152.