今天使用django-filter时候遇到了下面这个问题:

django-filter: TypeError at /goods/ init() got an unexpected keyword argument 'name'

I am learning Django REST Framework. And I want to use the django-filter in django rest framework to choose the result I want. I wrote a filter.py to get goods whose price is between pricemin and pricemax:

class GoodsFilter(filters.FilterSet):
pricemin = filters.NumberFilter(name="shop_price", lookup_expr='gte')
pricemax = filters.NumberFilter(name="shop_price", lookup_expr='lte') class Meta:
model = Goods
fields = ['pricemin', 'pricemax']

then I used this filter in view.py:

class GoodsListViewSet(mixins.ListModelMixin,viewsets.GenericViewSet):
queryset = Goods.objects.all()
serializer_class = GoodsSerializer
pagination_class = GoodsPagination
filter_backends = (DjangoFilterBackend,)
filter_class = GoodsFilter

when I run my project, there is an error like this:

TypeError at /goods/
__init__() got an unexpected keyword argument 'name'

I did not use argument 'name' in my code, so I have no idea about this error. Traceback:

Environment:

Request Method: GET
Request URL: http://127.0.0.1:8000/goods/ Django Version: 2.0.3
Python Version: 3.6.4
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'DjangoUeditor',
'users.apps.UsersConfig',
'goods.apps.GoodsConfig',
'trade.apps.TradeConfig',
'user_operation.apps.UserOperationConfig',
'crispy_forms',
'xadmin',
'rest_framework',
'django_filters']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']

Traceback:

File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django\core\handlers\exception.py" in inner
35. response = get_response(request) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django\core\handlers\base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django\core\handlers\base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view
54. return view_func(*args, **kwargs) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\rest_framework\viewsets.py" in view
103. return self.dispatch(request, *args, **kwargs) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\rest_framework\views.py" in dispatch
483. response = self.handle_exception(exc) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\rest_framework\views.py" in handle_exception
443. self.raise_uncaught_exception(exc) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\rest_framework\views.py" in dispatch
480. response = handler(request, *args, **kwargs) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\rest_framework\mixins.py" in list
40. queryset = self.filter_queryset(self.get_queryset()) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\rest_framework\generics.py" in filter_queryset
152. queryset = backend().filter_queryset(self.request, queryset, self) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\rest_framework\backends.py" in filter_queryset
94. if not filterset.is_valid() and self.raise_exception: File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\filterset.py" in is_valid
206. return self.is_bound and self.form.is_valid() File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\rest_framework\filterset.py" in form
24. form = super().form File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\filterset.py" in form
258. Form = self.get_form_class() File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\filterset.py" in get_form_class
250. for name, filter_ in self.filters.items()]) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\filterset.py" in <listcomp>
250. for name, filter_ in self.filters.items()]) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django_filters\filters.py" in field
138. self._field = self.field_class(label=self.label, **field_kwargs) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django\forms\fields.py" in __init__
330. super().__init__(max_value=max_value, min_value=min_value, **kwargs) File "C:\Users\Harry\Envs\testvir2\lib\site-packages\django\forms\fields.py" in __init__
254. super().__init__(**kwargs) Exception Type: TypeError at /goods/
Exception Value: __init__() got an unexpected keyword argument 'name'

原因如下

Filter.name renamed to Filter.field_name (#792)

The filter name has been renamed to field_name as a way to disambiguate the filter’s attribute name on its FilterSet class from the field_name used for filtering purposes.

So, from django-filter==2.0 onwards, use field_name instead of name

class GoodsFilter(filters.FilterSet):
pricemin = filters.NumberFilter(field_name="shop_price", lookup_expr='gte')
pricemax = filters.NumberFilter(field_name="shop_price", lookup_expr='lte') class Meta:
model = Goods
fields = ['pricemin', 'pricemax']

总结:

遇到问题,先查阅官方文档最靠谱,问谁都白搭~~

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