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I am trying to do for pagination and reading through this link.

Pagination in Django-Rest-Framework using API-View

I need to have next, previous url for pagination. Problem is that when I call this one, 

pagination_class = settings.DEFAULT_PAGINATION_CLASS

It say

'Settings' object has no attribute 'DEFAULT_PAGINATION_CLASS'

What do I need to import? or install ?

Models.py

class CarView(APIView):
permission_classes = ()

def get(self, request):
    """ Get all car """
    car = Car.objects.all()
    # paginator = PageNumberPagination()

    serializer = CarSerializer(car)
    serialized_car = CarSerializer(car, context={"request": request})
    # serializer = CarSerializer(car[0])
    return Response(serialized_car.data)

Serializers.py

class CarSerializer(serializers.ModelSerializer):

photo_url = serializers.SerializerMethodField('get_photo_url')

class Meta:
    model = Car
    fields = ('id','name','price', 'photo_url') 

def get_photo_url(self, car):
    request = self.context.get('request')
    photo_url = car.photo.url
    return request.build_absolute_uri(photo_url)

settings.py

REST_FRAMEWORK = {

'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
'PAGE_SIZE': 100,

'DEFAULT_AUTHENTICATION_CLASSES':
    ('rest_framework.authentication.OAuth2Authentication',
     'rest_framework.authentication.SessionAuthentication'),

'DEFAULT_MODEL_SERIALIZER_CLASS':
    'rest_framework.serializers.ModelSerializer',

'DEFAULT_PERMISSION_CLASSES':
('rest_framework.permissions.IsAdminUser',)

}
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Khant Thu Linn
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1 Answers1

3

Your settings file doesn't include a definition for DEFAULT_PAGINATION_CLASS, it does include a definition for REST_FRAMEWORK, and DEFAULT_PAGINATION_CLASS is part of it.

From Django Rest Framework documentation on accessing settings

Accessing settings

If you need to access the values of REST framework's API settings in your project, you should use the api_settings object. For example.

from rest_framework.settings import api_settings
print api_settings.DEFAULT_AUTHENTICATION_CLASSES

The api_settings object will check for any user-defined settings, and otherwise fall back to the default values. Any setting that uses string import paths to refer to a class will automatically import and return the referenced class, instead of the string literal.

You should be able to access api_settings.DEFAULT_PAGINATION_CLASS

Forge
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  • Do you mean I shall change like pagination_class = api_settings.DEFAULT_PAGINATION_CLASS ? I now got this error. Invalid API setting: 'DEFAULT_PAGINATION_CLASS' – Khant Thu Linn Feb 20 '16 at 15:55
  • @KhantThuLinn did you import `api_settings` like in the example above? – Forge Feb 20 '16 at 16:40
  • you mean to import in settings.py? Write this in there? from rest_framework.settings import api_settings – Khant Thu Linn Feb 20 '16 at 16:49
  • Not in settings.py, where you use `DEFAULT_PAGINATION_CLASS`. You should use the import statement `from rest_framework.settings import api_settings`. – Forge Feb 20 '16 at 19:28
  • amm still, it it not okay. I already import that and write pagination_class = api_settings.DEFAULT_PAGINATION_CLASS. I got error like Invalid API setting: 'DEFAULT_PAGINATION_CLASS – Khant Thu Linn Feb 21 '16 at 12:52
  • I too am getting the same error..any ideas why it is occurring?? I have imported the api_settings in views.py also – the_unknown_spirit Jul 10 '16 at 10:43