Django REST Framework - 将额外参数传递给操作

我在用着Django 2.0 and Django REST Framework

我创建了一个操作方法来从数据库中删除特定对象

联系人/views.py

class ContactViewSet(viewsets.ModelViewSet):
    serializer_class = ContactSerializer
    permission_classes = (IsAuthenticated, AdminAuthenticationPermission,)

    # others actions goes here

    @action(methods=['delete'], detail=False, url_path='delete_phone/<phone_pk>/')
    def delete_phone(self, request, pk=None):
        contact = self.get_object()
        print(contact)
        print(pk)
        print(self.kwargs['phone_pk'])
        return Response({'status': 'success'})

应用程序/urls.py

router.register(r'contacts', ContactViewSet, 'contacts')

api_urlpatterns = [
    path('', include(router.urls)),
]

但是当我访问

DELETE: http://url/api/contacts/delete_phone/1/

它给page not found error.

在错误页面中，列出了尝试过 url 模式

api/ ^contacts/delete_phone/<phone_pk>//$ [name='contacts-delete-phone']
api/ ^contacts/delete_phone/<phone_pk>\.(?P<format>[a-z0-9]+)/?$ [name='contacts-delete-phone']

如果您不能/不想/安装任何内容drf-nested-routers，您可以通过执行以下操作来实现相同的目的：

@action(detail=True,
        methods=['delete'],
        url_path='contacts/(?P<phone_pk>[^/.]+)')
def delete_phone(self, request, phone_pk, pk=None):
    contact = self.get_object()
    phone = get_object_or_404(contact.phone_qs, pk=phone_pk)
    phone.delete()
    return Response(.., status=status.HTTP_204_NO_CONTENT)

诀窍是将正则表达式放入url_path装饰器的参数并将其传递给装饰方法（避免仅使用pk不然会和第一个pk碰撞）

测试用：

Django==2.0.10
djangorestframework==3.9.0