Invalid Literal For Int() With Base Ten In Listapi View Django Rest Framework

I am using a view in django rest framework. In this view it takes an argument city to then fetch a list a neighborhoods in that city. the example of the url looks like this: http:

Solution 1:

Update - My original answer was incorrect. List view doesn't actually work with the lookup_field and lookup_url_kwarg attributes, those attributes are used by Rest Frameworks DetailView in the get_object(self) method to retrieve a single instance using those lookup fields.

I've updated the answer so it overrides the get_queryset(self) method to return the correctly filtered list. This is how ListView should be customised.

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It looks like you haven't defined your ListView properly. The problem seems to be that you are trying to filter on the Cities Primary Key, which is an integer field, using a string that can't be parsed as an integer. I'll write up how I think your view should look presuming your trying to do your filtering based on some field on the City model.

# models.pyclassCity(models.Model):
    name = models.CharField(max_length=32)

classNeighbourhood(models.Model):
    city = models.ForeignKey(City)

# views.pyclassNeighbourhoodListView(generics.ListAPIView):
    queryset = Neighbourhood.objects.all()
    serializer_class = NeighbourhoodSerializer

    defget_queryset(self):
        return self.queryset.filter(city__name=self.kwargs.get('city')

# urls.py
urlpatterns = [
    url(
        r'^neighbourhood-list/(?P<city>[a-zA-Z]+)/$',
        NeighbourhoodListView.as_view(),
        name='neighbourhood-list',
    )
]

This will filter your Neighbourhoods by the Cities name. If you want to filter Neighbourhoods by the cities Primary Key, then you should use:

# views.pyclassNeighbourhoodListView(generics.ListAPIView):
    queryset = Neighbourhood.objects.all()
    serializer_class = NeighbourhoodSerializer

    defget_queryset(self):
        return self.queryset.filter(city=self.kwargs.get('city'))

# urls.py
urlpatterns = [
    url(
        r'^neighbourhood-list/(?P<city>\d+)/$',
        NeighbourhoodListView.as_view(),
        name='neighbourhood-list',
    )
]

This fixes the view and url's to filter Neighbourhoods by the Cities Primary Key. This would be more performant because it doesn't need to perform a join between City and Neighbourhood.