OrderingFilter没有属性“filter_queryset”
OrderingFilter没有属性“filter_queryset”
提问于 2016-11-13 11:37:45
我一直在尝试让OrderingFilter正常工作。从django-rest-framework页面中的示例来看，似乎应该相当简单：
class UserListView(generics.ListAPIView):
queryset = User.objects.all()
serializer_class = UserSerializer
filter_backends = (filters.OrderingFilter,)
ordering_fields = ('username', 'email')然而，当我尝试这样做的时候：
from django_filters.rest_framework import DjangoFilterBackend, FilterSet, OrderingFilter
...
class ListingViewSet(viewsets.ModelViewSet):
queryset = Listing.objects.all()
serializer_class = ListingSerializer
filter_backends = (DjangoFilterBackend, OrderingFilter,)
filter_class = ListFilter
ordering_fields = ('price', 'views')
ordering = ('price',)我得到一个关于OrderingFilter没有filter_queryset属性的错误：
ERROR 2016-11-13 03:14:57,304 log 25913 123145338523648 (<class 'AttributeError'>, AttributeError("'OrderingFilter' object has no attribute 'filter_queryset'",), <traceback object at 0x106ef48c8>)
Traceback (most recent call last):
File "/.../lib/python3.5/site-packages/rest_framework/views.py", line 474, in dispatch
response = handler(request, *args, **kwargs)
File "/.../lib/python3.5/site-packages/rest_framework/mixins.py", line 40, in list
queryset = self.filter_queryset(self.get_queryset())
File "/.../lib/python3.5/site-packages/rest_framework/generics.py", line 151, in filter_queryset
queryset = backend().filter_queryset(self.request, queryset, self)
AttributeError: 'OrderingFilter' object has no attribute 'filter_queryset'在OrderingFilter中，它确实没有filter_queryset方法，但视图需要它：
# in GenericAPIView(views.APIView)
def filter_queryset(self, queryset):
"""
Given a queryset, filter it with whichever filter backend is in use.
You are unlikely to want to override this method, although you may need
to call it either from a list view, or from a custom `get_object`
method if you want to apply the configured filtering backend to the
default queryset.
"""
for backend in list(self.filter_backends):
queryset = backend().filter_queryset(self.request, queryset, self)
return queryset我已经尝试了django rest framework queryset doesn't order中的各种解决方案，但它们似乎也不起作用。我试着更新最有希望的答案：
class YOUR_VIEW_SET(viewsets.ModelViewSet):
#your code here
ordering_filter = OrderingFilter()
def filter_queryset(self, queryset):
queryset = super(YOUR_VIEW_SET, self).filter_queryset(queryset)
return self.ordering_filter.filter_queryset(self.request, queryset, self)由于OrderingFilter没有filter_queryset方法，我将filter_queryset更改为filter (它确实有)，但此调用似乎与OrderingFilter中的filter签名冲突：
# In OrderingFilter(BaseCSVFilter, ChoiceFilter)
def filter(self, qs, value):
if value in EMPTY_VALUES:
return qs
ordering = [self.get_ordering_value(param) for param in value]
return qs.order_by(*ordering)我不知道函数声明中的查询集应该是什么，所以我可以尝试将它传递给函数，但似乎qs引用了查询集，所以我假设应该是第一个参数，而不是第二个参数，但我也不完全确定value是什么；它似乎不是request，因为它是不可迭代的。
如果我错过了一些明显的东西，我将不胜感激。我对Django不是很熟悉。
回答 1
Stack Overflow用户
回答已采纳
发布于 2016-11-14 17:50:20
我自己也遇到了这个问题！
不要使用django_filters中的类，而要使用rest_framework.filters.OrderingFilter。
from rest_framework.filters import OrderingFilter
from django_filters.rest_framework import DjangoFilterBackend, FilterSet
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原文链接：
https://stackoverflow.com/questions/40570311
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