django rest框架列表更新api View

Question

我正在尝试向列表项添加更新选项。因此，如果有人对其执行“PATCH”请求，我将获取详细信息并进行更新。这是我的实现代码

class SwitchListView(UpdateModelMixin, ListAPIView):
  serializer_class = serializers.SwitchSerializer
  lookup_field = 'home_id'

  def get_queryset(self):
    home_id = self.kwargs.get('home_id', None)
    if home_id is None or int(home_id) < 0 or \
            self.request.user.pk != models.Home.objects.filter(pk=home_id)[0].user.pk:
        return models.Switch.objects.none()
    query = models.Switch.objects.filter(home=models.Home.objects.filter(pk=home_id))
    return query

  def get(self, request, *args, **kwargs):
    return super(SwitchListView, self).get(request, *args, **kwargs)

  def partial_update(self, request, *args, **kwargs):
    print("Came here")
    data = request.data['data']
    for i in data:
        query = self.get_queryset().filter(i['pk'])
        if query.exists():
            query.switch_status = i['switch_status']
            query.save()

    return Response({'message': 'successfully updated switch!'})

但这里对 api 的请求只接受 GET、HEAD 和 OPTIONS。我什至尝试添加 http_method_names = ('get', 'patch') 但即使这样也行不通!!

有什么办法可以将补丁请求放到 View 中吗？

谢谢

Answer 1

这是我的实现，FWIW:

from rest_framework import viewsets
from rest_framework.response import Response

class MyListView(viewsets.mixins.ListModelMixin, viewsets.GenericViewSet):
    serializer_class = ...
    queryset = MyModel.objects.all()

    def list_update(self, request, *args, **kwargs):
        queryset = self.filter_queryset(self.get_queryset())
        instances = list(queryset)
        count = len(instances)
        # TODO perhaps validate for max allowed count, before doing list(queryset) !
        data = [request.data] * count
        serializer = self.get_serializer(
            instances, data, many=True, partial=True)
        serializer.is_valid(raise_exception=True)
        self.perform_list_update(serializer)
        return Response(status=204)

    def perform_list_update(self, serializer):
        for instance, data in zip(
                serializer.instance, serializer.validated_data):
            for attr, value in data.items():
                setattr(instance, attr, value)
            instance.save()
        # alternatively use a queryset.update, but be aware that it will not
        # fire pre_save and post_save signals

如果你没有使用 DRF 路由器(因为当做任何像这样的“自定义”时，只使用裸 View 通常更轻松)，像这样编辑 urls.py:

urlpatterns = [
    ...
    re_path(
        r'^path/to/mymodels',
        MyListView.as_view({
            'get': 'list', 
            'patch': 'list_update',  # <--
        }),
    ),
]

如果使用路由器，这个小 hack 可以工作并且很简单，但不是非常好:

router = routers.DefaultRouter(trailing_slash=False)
router.routes[0].mapping['patch'] = 'list_update'  # <--
...

覆盖 View 集上的 get_serializer_class 以便为 list_update 操作使用不同的序列化程序也可能有意义。