rbarrois/factory_boy — comment on commit 720371777ff8cf3e5d299398d530b948034a228a
File: factory/base.py line 259
By jdunck:

Model.objects actually isn't guaranteed to exist. ._default_manager is. .objects is just a convention, but Django internally ensures that ._default_manager is defined, and that is what Django uses internally:
https://code.djangoproject.com/browser/django/trunk/django/db/models/manager.py?rev=16930#L8