Tastypie - 按相关pk过滤

Question

我想通过相关字段pk过滤资源。

例如，我有国家PK，我想从该国家获得所有城市。我怎么能这样做？

class CityResource(ModelResource):
    class Meta:
        queryset = City.objects.all()
        resource_name = 'city'
        fields = ['name','id']

        filtering = {
           #Something here
        }

class CountryResource(ModelResource):
    class Meta:
        queryset = Country.objects.all()
        resource_name = 'country'
        fields = ['name','code2','id']

示例网址：

http://startuprepublik.pre.is/api/v1/city/?format=json&country__pk=4

有什么想法吗？

Answer 1

from tastypie.fields import ForeignKey
from tastypie.resources import ALL_WITH_RELATIONS

class CityResource(ModelResource):
    country = ForeignKey("path.to.api.CountryResource", "country")

    class Meta:
        queryset = City.objects.all()
        resource_name = 'city'
        fields = ['name','id']

        filtering = {
           "country": ALL_WITH_RELATIONS
        }

class CountryResource(ModelResource):
    class Meta:
        queryset = Country.objects.all()
        resource_name = 'country'
        fields = ['name','code2','id']
        filtering = { "id": ALL }