Django Rest Framework，更新嵌套的序列化数据

Question

我是使用 Django Rest Framework 和序列化数据的新手，我正在尝试更新嵌套的序列化程序，但遇到了墙，我环顾四周，但大多数人在 serializers.py 方面都有问题，而我不能即使进入 def update 没有错误，这些是我的课程：

视图.py

from django.shortcuts import render
from rest_framework import generics
from api.serializers import ProfileSerializer
from django.contrib.auth.models import User
from api.models import Profile
from django.http import JsonResponse

class ProfileView(generics.ListCreateAPIView):
    def get(self, request):
        profile = Profile.objects.filter(user_id=request.user.id)
        serializer = ProfileSerializer(profile, many=True)
        return JsonResponse(serializer.data, safe=False)
    def post(self, request, *args, **kwargs):
        profile = Profile.objects.filter(user_id=request.user.id)
        data = request.POST
        serializer = ProfileSerializer(profile, data=data, partial=True)
        if serializer.is_valid():
            serializer.save()
        else:
            print(serializer.errors)
        return JsonResponse(serializer.data, safe=False)

序列化器.py

from rest_framework import serializers
from django.contrib.auth.models import User
from api.models import Profile

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('id','username','first_name','last_name','email','last_login','date_joined','is_active')

class ProfileSerializer(serializers.ModelSerializer):
    user = UserSerializer()
    class Meta:
        model = Profile
        fields = ('id','phone','birth_date','user')

        def update(self, instance, validated_data):
            #Cant get here
            print("hey")
            return instance

样本结构

[
    {
        "id": 3,
        "phone": "XXXXXX",
        "birth_date": "2017-06-29",
        "user": {
            "id": 1,
            "username": "xxxxx",
            "first_name": "XXXXX",
            "last_name": "XXXX",
            "email": "xxxxxxx@gmail.com",
            "last_login": "2017-06-29T15:16:11.438818Z",
            "date_joined": "2017-06-23T16:48:38Z",
            "is_active": true
        }
    }
]

我当前的错误：（ 发布数据：电话 = 0000000）

AttributeError at /profile/
'QuerySet' object has no attribute '_meta'

谢谢！

Answer 1

发现自己处于类似情况，我能够解决如下问题。希望它有所帮助。

def update(self, instance, validated_data):
    user_data = validated_data.pop('user')
    user_serializer = UserSerializer()
    super(self.__class__, self).update(instance,validated_data)
    super(UserSerializer,user_serializer).update(instance.user,user_data)
    return instance

Answer 2

您看到此错误是因为您将 queryset 而不是 instance 传递给 serializer __init__。要解决错误更改此：

def post(self, request, *args, **kwargs):
    profile = Profile.objects.filter(user_id=request.user.id)

对此：

def post(self, request, *args, **kwargs):
    profile = Profile.objects.get(user_id=request.user.id)

换句话说，而不是由filter您返回的查询集，您需要返回的 Profile 实例get。

UPD

更新嵌套用户试试这个（没有测试它，让我知道这是否有任何错误）：

def update(self, instance, validated_data):
    user = validated_data.get('user')
    instance.user.first_name = user.get('first_name')
    instance.user.save()

    print("hey")
    return instance