weird error
File "/usr/local/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner 34. response = get_response(request)
File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response 126. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response 124. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.7/site-packages/django/views/decorators/csrf.py" in wrapped_view 54. return view_func(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/rest_framework/viewsets.py" in view 116. return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py" in dispatch 495. response = self.handle_exception(exc)
File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py" in handle_exception 455. self.raise_uncaught_exception(exc)
File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py" in dispatch 492. response = handler(request, *args, **kwargs)
File "/usr/src/app/apps/api/views.py" in bulk_update 177. serializer.save()
File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py" in save 726. self.instance = self.update(self.instance, validated_data)
File "/usr/src/app/apps/api/serializers.py" in update 124. ret.append(self.child.update(line, data))
File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py" in update 974. info = model_meta.get_field_info(instance)
File "/usr/local/lib/python3.7/site-packages/rest_framework/utils/model_meta.py" in get_field_info 35. opts = model._meta.concrete_model._meta
Exception Type: AttributeError at /api/documents/322/parts/21904/lines/bulk_update/ Exception Value: 'NoneType' object has no attribute '_meta' Request information: USER: elena.lolli