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    User.object.filter(name='xxx')

    path('<str:name>/vote/', vote_list, name='vote_list')
    ......
    class ListExample(mixins.ListModelMixin):
        serializer_class = UserSerializers
    
        def get_querySet(self):
            nm = self.kwarg['name']
            return User.object.filter(name=nm)

    http://example.com/api/user?name=xxx
    ......
    param = self.request.query_params('name', None)
    querySet = User.object.filter(name=params)

REST_FRAMEWORK = {
    'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',)
}

    filter_backends = (DjangoFilterBackend,)
    filter_fields = ['name']

class RangeWidget(DateRangeWidget):
    suffixes = ['from', 'to']

class FormFilter(django_filters.rest_framework.FilterSet):
    name = django_filters.CharFilter(field_name='game__name', lookup_expr='icontains')
    source = django_filters.CharFilter(field_name='game__source', lookup_expr='icontains')
    num = django_filters.NumberFilter(field_name='num', lookup_expr='gte')
    time = django_filters.DateFilter(field_name='pub_time')
    range = django_filters.DateTimeFromToRangeFilter(field_name='pub_time', widget=RangeWidget)

    class Meta:
        models = Post
        fields = ['name', 'source', 'num', 'pub_time', 'pub_time']
        
class PostView(mixins.ListModelMixin, GenericViewSet):
    """
        list:
            post列表
    """
    queryset = Post.objects.all()
    serializer_class = PostSerializer
    pagination_class = PostPagination
    filter_backends = (DjangoFilterBackend,)
    filter_class = FormFilter

class DateFromToRangeFilter(RangeFilter):
    field_class = DateRangeField


class DateTimeFromToRangeFilter(RangeFilter):
    field_class = DateTimeRangeField


class IsoDateTimeFromToRangeFilter(RangeFilter):
    field_class = IsoDateTimeRangeField


class TimeRangeFilter(RangeFilter):
    field_class = TimeRangeField

class IsoDateTimeRangeField(RangeField):
    widget = DateRangeWidget

    def __init__(self, *args, **kwargs):
        fields = (
            IsoDateTimeField(),
            IsoDateTimeField())
        super().__init__(fields, *args, **kwargs)

class DateRangeWidget(RangeWidget):
    suffixes = ['after', 'before']

class RangeWidget(DateRangeWidget):
    suffixes = ['from', 'to']
    ......
range = django_filters.DateTimeFromToRangeFilter(field_name='pub_time', widget=RangeWidget)
# url
http://127.0.0.1:8000/spider/post?range_from=2019-06-09+00:00:00&range_to=2019-06-11+00:00:00

    filter_backends = (filters.OrderingFilter,)
    # 指定字段搜索排序
    ordering_fields = ('username', 'email')
    # 默认字段搜索排序
    ordering = ('username',)