'NoneType' object has no attribute 'attrs'

I’m trying import-export on Django 3, python 3.8, on a fairly large site with lots of models, but I encounter this on the first class inspected in this code, which is import_export.resources.Resource.

    from import_export import resources
  File "/usr/lib/python3.8/site-packages/import_export/resources.py", line 234, in <module>
    class Resource(metaclass=DeclarativeMetaclass):
  File "/usr/lib/python3.8/site-packages/import_export/resources.py", line 202, in __new__
    setattr(meta, option, getattr(options, option))
AttributeError: 'NoneType' object has no attribute 'attrs'

When I add code to avoid that (if options:), I then encounter

    from import_export import resources
  File "/usr/lib/python3.8/site-packages/import_export/resources.py", line 986, in <module>
    class ModelResource(Resource, metaclass=ModelDeclarativeMetaclass):
  File "/usr/lib/python3.8/site-packages/import_export/resources.py", line 914, in __new__
    new_class = super().__new__(cls, name, bases, attrs)
  File "/usr/lib/python3.8/site-packages/import_export/resources.py", line 183, in __new__
    setattr(meta, option, getattr(options, option))
AttributeError: 'NoneType' object has no attribute 'attrs'

Again a guard if options: around that code helps.

• Django Import Export: 2.0.2, 2.3.0, master
• Python 3.8
• Django 3.0.8

Odd packages which might be related are django-compat-patcher, and forbiddenfruit.

[juanjux]

On forbiddenfruit.py we replaced:

calling_frame = inspect.currentframe().f_back
return sorted(calling_frame.f_locals.keys())

with:

return  __builtin__.dir(obj)

So it’s doing a dir(None) but that’s ok for our use case of the module.

[matthewhegarty]

Fixed in #1325