'NoneType' object has no attribute 'objects'

[smutel]

Hello,

I would like to set a custom field previously created as required.
I receive this error message: 'NoneType' object has no attribute 'objects'.
Perhaps it's because it's not set on all objects at this time ? I check that with the web interface and i didn't see case where this custom field is not set.

Thanks.

[candlerb]

Please be more specific about how to reproduce this issue. What exactly are you doing that triggers the error message? Can you get a backtrace? (Set ADMINS and EMAIL in configuration.py, and it should be sent out automatically)

[smutel]

Not sure about how to reproduce this issue. Perhaps:
1/ Create a custom field of type selection
2/ Update this custom field on all objects to set a value
3/ Update the custom field and select the required option

Some part of the mail I received:
Title : [NetBox] ERROR (internal IP): Internal Server Error: /extras/custom-fields/24/edit/

Internal Server Error: /extras/custom-fields/24/edit/

AttributeError at /extras/custom-fields/24/edit/
'NoneType' object has no attribute 'objects'
Traceback (most recent call last):
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "./netbox/views/generic.py", line 325, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "./utilities/views.py", line 93, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/views/generic/base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "./netbox/views/generic.py", line 357, in post
    obj = form.save()
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/forms/models.py", line 469, in save
    self._save_m2m()
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/forms/models.py", line 451, in _save_m2m
    f.save_form_data(self.instance, cleaned_data[f.name])
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/db/models/fields/related.py", line 1668, in save_form_data
    getattr(instance, self.attname).set(data)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py", line 1014, in set
    self.remove(*old_ids)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py", line 967, in remove
    self._remove_items(self.source_field_name, self.target_field_name, *objs)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py", line 1202, in _remove_items
    model=self.model, pk_set=old_ids, using=db,
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/dispatch/dispatcher.py", line 182, in send
    for receiver in self._live_receivers(sender)
  File "/opt/netbox/current/venv-py3/lib/python3.7/site-packages/django/dispatch/dispatcher.py", line 182, in <listcomp>
    for receiver in self._live_receivers(sender)
  File "./extras/signals.py", line 139, in handle_cf_removed_obj_types
    instance.remove_stale_data(ContentType.objects.filter(pk__in=pk_set))
  File "./extras/models/customfields.py", line 163, in remove_stale_data
    instances = model.objects.filter(**{f'custom_field_data__{self.name}__isnull': False})