一次创建多个实例 Django Rest 框架

Question

似乎有很多关于此的文档，但似乎没有一个对我有用。我正在尝试构建一个同时创建一个或多个对象的 API 视图。

类似于传递以下内容：

[
    {
        "response": "I have no favourites",
        "user": 1,
        "update": "64c5fe6f-cb65-493d-8ef4-126db0195c33",
        "question": "297b46b4-714b-4434-b4e6-668ff926b38e"
    },
    {
        "response": "Good",
        "user": 1,
        "update": "64c5fe6f-cb65-493d-8ef4-126db0195c33",
        "question": "13916052-690e-4638-bb7c-908c38dcd75e"
    }
]

我当前的视图集

class FeedbackViewSet(viewsets.ModelViewSet):

    permission_classes = [AllowAny]
    queryset = Feedback.objects.all()
    serializer_class = FeedbackSerializer

和序列化器：

class ContributionSerializer(serializers.ModelSerializer):
    class Meta:
        model = Contribution
        fields = '__all__'

我尝试设置 FeedbackSerializer(many=True) 但这告诉我它不可调用。此外，我尝试了ListCreateAPIView，但这告诉我它需要字典而不是列表。

Answer 1

覆盖 create(...) 方法

from rest_framework.response import Response
from rest_framework import status


class FeedbackViewSet(viewsets.ModelViewSet):
    permission_classes = [AllowAny]
    queryset = Feedback.objects.all()
    serializer_class = FeedbackSerializer

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data, many=True) # not that `many=True` id mandatory since you are dealing with a list of of inputs
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(
            serializer.data,
            status=status.HTTP_201_CREATED,
            headers=headers
        )

Answer 2

many=True 的想法是正确的。你只需要把它放在正确的位置......所以在 ViewSet 中：

class FeedbackViewSet(viewsets.ModelViewSet):

    permission_classes = [AllowAny]
    queryset = Feedback.objects.all()
    serializer_class = FeedbackSerializer

    def get_serializer(self, *args, **kwargs):
        # add many=True if the data is of type list
        if isinstance(kwargs.get("data", {}), list):
            kwargs["many"] = True

        return super(FeedbackViewSet, self).get_serializer(*args, **kwargs)

还有其他方法可以实现相同的行为，但我认为这很干净！