django-rest-framework 自定义视图集检索多个查找参数

Question

我有两个模型，分别是 A 和 B。

模型看起来像

class A(models.Model):
    name = models.CharField(max_length=100)
    description = models.CharField(max_length=1000)
    slug = models.CharField(max_length=100)

class B(models.Model):
    name = models.CharField(max_length=100)
    description = models.CharField(max_length=1000)
    slug = models.CharField(max_length=100)
    A = models.foreignkey(A, models.SET_NULL, blank=true)

序列化器

Class ASerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
         model = A
         fields = '__all__'
         lookup_field = 'slug'
         extra_kwargs = {'url': {'lookup_field': 'slug'}}


Class BSerializer(serializers.ModelSerializer):
    class Meta:
         model = B
         fields = '__all__'

模型视图集

from rest_framework import viewsets, permissions
from rest_framework.response import Response
from rest_framework.decorators import action
from .models import (A, B)
from .serializers import (ASerializer, BSerializer)


Class AViewSet(viewsets.ModelViewSet):
     queryset = A.objects.all()
     serializer_class = ASerializer
     permission_classes =                           (permissions.DjangoModelPermissionsOrAnonReadOnly, )
     lookup_field = 'slug'

     def retrieve(self, request, *args, **kwargs):
          instance = self.get_object()
          bs = B.objects.filter(A=instance.id)
          serializer = BSerializer(bs, many=True)

          return Response(serializer.data)

我想访问类似

的网址

Url: ^A/<slug>/B/slug>/$

我浏览了 Django Restframework 文档，发现我们可以添加自定义 url，例如（drf-custom-rounting。我不明白如何制作上面的访问 url 模式。

如何定制这样的？

编辑： 我已经解决了我的问题。我找到了类似类型的问题解决方案here。感谢您的所有回复。

Answer 1

我认为您正在寻找的是一种制作嵌套网址的方法。

DRF 文档推荐的方式是使用这个包：https://github.com/alanjds/drf-nested-routers

使用示例：

首先你创建你的视图集：

Class BViewSet(viewsets.ModelViewSet):
     queryset = B.objects.all()
     serializer_class = BSerializer
     lookup_field = 'slug'

     def retrieve(self, request, a_slug=None, b_slug=None):
          a = self.get_object()
          # Now you retrieve all B related to A
          bs = B.objects.filter(A=a)
          serializer = BSerializer(bs, many=True)
          return Response(serializer.data)

然后您使用 drf-nested-routers 注册您的视图集：

from rest_framework_nested import routers

from .viewsets import AViewSet, BViewSet

a_router = routers.SimpleRouter()
a_router.register(r'A', AViewSet)

b_router = routers.NestedSimpleRouter(a_router, r'B')
b_router.register(r'B', BViewSet)

urlpatterns = patterns('',
    url(r'^', include(a_router.urls)),
    url(r'^', include(b_router.urls)),
)

Answer 2

在你的 urls.py 上

from django.conf.urls import url, include
from rest_framework import routers

router = routers.DefaultRouter()
router.register(r'yourregex', views.AViewSet)

urlpatterns = [
    url(r'^api/', include(router.urls)),
]