Error importing mixins using from rest_framework_bulk import mixins as bulk_mixins

[ldgarcia]

Background
I needed to write my own view, using the provided bulk mixins.

Problem
I first tried importing using from rest_framework_bulk import mixins as bulk_mixins. Then, got the following error AttributeError: 'module' object has no attribute 'BulkCreateModelMixin' when trying to use bulk_mixins.BulkCreateModelMixin.

In the Django shell:

>>> from rest_framework_bulk import mixins as bulk_mixins
>>> dir(bulk_mixins)
['CreateModelMixin', 'DestroyModelMixin', 'Http404', 'ListModelMixin', 'Response', 'RetrieveModelMixin', 'UpdateModelMixin', 'ValidationError', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '_get_validation_exclusions', 'api_settings', 'clone_request', 'status', 'unicode_literals', 'warnings']

Whereas:

>>> from rest_framework_bulk.generics import bulk_mixins
>>> dir(bulk_mixins)
['BulkCreateModelMixin', 'BulkDestroyModelMixin', 'BulkUpdateModelMixin', 'CreateModelMixin', 'Response', 'ValidationError', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'print_function', 'status', 'unicode_literals']

Solution

from rest_framework_bulk.generics import bulk_mixins

---

Having fixed the above problem, I stumped with the following:

1. Make a POST request passing an array of objects.
2. It saves correctly, but the response throws this error: 'RelationsList' object has no attribute 'priority'.
3. After that, make a GET request and the previously updated data renders correctly.

When a non-bulk POST request (with just one object, not a list of objects) is made, it saves successfully and the response throws no error.

In my view I have:

      def get_serializer_class(self):
          if self.request.method == 'GET':
              return NestedSelectedPlaceSerializer
          return SelectedPlaceSerializer

My serializer classes are:

class SelectedPlaceSerializer(serializers.ModelSerializer):
    class Meta:
        model =  SelectedPlace
        fields = ('user', 'place', 'priority')

class NestedSelectedPlaceSerializer(serializers.ModelSerializer):
    place = PlaceSerializer()

    class Meta:
        model = SelectedPlace
        fields = ('place', 'priority')

Traceback

Environment:


Request Method: POST
Request URL: https://127.0.0.1:8443/api/places/selected

Traceback:
File "/home/user/venv/project1/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  139.                 response = response.render()
File "/home/user/venv/project1/local/lib/python2.7/site-packages/django/template/response.py" in render
  105.             self.content = self.rendered_content
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/response.py" in rendered_content
  59.         ret = renderer.render(self.data, media_type, context)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/renderers.py" in render
  592.         context = self.get_context(data, accepted_media_type, renderer_context)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/renderers.py" in get_context
  542.         raw_data_post_form = self.get_raw_data_form(view, 'POST', request)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/renderers.py" in get_raw_data_form
  492.                 content = renderer.render(serializer.data, accepted, context)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/serializers.py" in data
  573.                 self._data = self.to_native(obj)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/serializers.py" in to_native
  349.             value = field.field_to_native(obj, field_name)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/fields.py" in field_to_native
  334.         return super(WritableField, self).field_to_native(obj, field_name)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/fields.py" in field_to_native
  198.             value = get_component(value, component)
File "/home/user/venv/project1/local/lib/python2.7/site-packages/rest_framework/fields.py" in get_component
  56.         val = getattr(obj, attr_name)

Exception Type: AttributeError at /api/places/selected/
Exception Value: 'RelationsList' object has no attribute 'priority'

[miki725]

The failing import is very strange. Will try to replicate the issue. As for the other issue, will look over it sometime this week. Thank you for reporting.

[miki725]

Are you using Django REST Api views (the ones with templates, etc). Or you are making the API call directly using curl or POSTMAN, etc?

[ldgarcia]

Hi @miki725, have you had a chance to take a look at this?

[miki725]

Just merged this and bumped version number