具有多个ID的DjangoFilterBackend

Question

我想用django-filter过滤我的模型。如果我按一个id过滤，效果很好：

http://localhost:8000/accommodations?accommodationType_id=1

但我不知道如何通过多个id进行过滤。在

^{pr2}$

我的实际ViewSet如下所示：

class AccommodationViewSet(viewsets.ReadOnlyModelViewSet):
    """
        REST API endpoint for 'accommodation' resource
    """
    queryset = Accommodation.objects.all()
    serializer_class = AccommodationSerializer
    filter_backends = (filters.DjangoFilterBackend,)
    filter_fields = ('accommodationType_id', 'name')

我希望有一个解决办法。在

Answer 1

我找到了以下解决问题的方法：）

https://gist.github.com/aBuder/654fb945f085b17358d8

from webapp.serializers import *
from rest_framework import viewsets
from rest_framework import filters
from django_filters import Filter, FilterSet


class ListFilter(Filter):
    def filter(self, qs, value):
        if not value:
            return qs

        # For django-filter versions < 0.13, use lookup_type instead of lookup_expr
        self.lookup_expr = 'in'
        values = value.split(',')
        return super(ListFilter, self).filter(qs, values)


class AccommodationFilter(FilterSet):
    ids = ListFilter(name='id')
    accommodationType_ids = ListFilter(name='accommodationType_id')

    class Meta:
        model = Accommodation
        fields = ['ids', 'accommodationType_ids']


class AccommodationViewSet(viewsets.ReadOnlyModelViewSet):
    """
        REST API endpoint for 'accommodation' resource
    """
    queryset = Accommodation.objects.all()
    serializer_class = AccommodationSerializer
    filter_backends = (filters.DjangoFilterBackend,)
    filter_class = AccommodationFilter

Answer 2

我知道这是一个老问题，但也许值得给出一个更新的答案。在

Django过滤器贡献者添加了一个名为BaseInFilter的字段，您可以将其与其他过滤器组合起来验证内容。在

参见文档： https://django-filter.readthedocs.io/en/latest/ref/filters.html#baseinfilter

例如，这在您的案例中是可行的：

from django_filters import rest_framework as filters


class NumberInFilter(filters.BaseInFilter, filters.NumberFilter):
    pass


class AccommodationFilter(filters.FilterSet):
    accommodationType_id_in = NumberInFilter(field_name='accommodationType_id', lookup_expr='in')

    class Meta:
        model = Accommodation
        fields = ['accommodationType_id_in', ]

然后您就可以通过id列表进行筛选：http://localhost:8000/accommodations?accommodationType_id_in=1,2