python djaangorestframework 3.3.3更新nested serializ

Question

使用django rest framework 3.3.3

我正在尝试使用django rest框架更新数据库中的现有数据，遵循之前发布的解决方案：django-rest-framework 3.0 create or update in nested serializer

一般来说，我对django和rest框架还比较陌生。你知道吗

考虑到以下模型：

class Clinic(models.Model):

    name = models.TextField()
    streetNumber = models.IntegerField()
    unitNumber = models.CharField(max_length=10, blank=True, null=True)
    streetName = models.CharField(max_length=50)
    city = models.CharField(max_length=50)
    province = models.CharField(max_length=3)
    country = models.CharField(max_length=30)
    postalCode = models.CharField(max_length=6)
    phone = models.CharField(max_length=10)

    def __str__(self):
        return self.name


class Time (models.Model):

     clinic = models.ForeignKey(Clinic, related_name='times')
     appointmentTime = models.CharField(max_length=100)

     def __str__(self):
         return self.appointmentTime

以及以下序列化程序：

class TimeSerializer(serializers.ModelSerializer):

    class Meta:
        model = Time
        fields = ('appointmentTime',)


class ClinicSerializer(serializers.ModelSerializer):

    times = TimeSerializer(many=True)

    class Meta:
        model = Clinic
        fields = '__all__'

    def update(self, instance, validated_data):

        instance.name = validated_data['name']
        instance.streetName = validated_data['streetName']
        instance.unitNumber = validated_data['unitNumber']
        instance.city = validated_data['city']
        instance.province = validated_data['province']
        instance.country = validated_data['country']
        instance.postalCode = validated_data['postalCode']
        instance.phone = validated_data['phone']
        #print(instance)
        instance.save()

        times_data = [item['id'] for item in validated_data['times']]
        print(times_data)
        for time in instance.clinics:
            if time.id not in times_data:
                time.delete()

        for item in validated_data['times']:
            time = Time(id=item['id'], clinic=instance,
            appointmentTime=item['appointmentTime'])
            time.save()

        return instance

以及以下视图：

class ClinicList(APIView):

def get(self,request):
    clinics = Clinic.objects.all()
    serializer = ClinicSerializer(clinics, many=True)
    return Response({'results': serializer.data})

def post(self, request):

    serializer = ClinicSerializer(data=request.data)
    if serializer.is_valid():

        serializer.update(Clinic, serializer.data)

        return Response(serializer.data, status=status.HTTP_201_CREATED)
    return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

以及以下现有数据：

{
        "id": 2,
        "times": [
            {
                "appointmentTime": "time3"
            },
            {
                "appointmentTime": "time3"
            }
        ],
        "name": "Example Clinic",
        "streetNumber": 123,
        "unitNumber": "",
        "streetName": "Example Street",
        "city": "Exampletown",
        "province": "Ont",
        "country": "Canada",
        "postalCode": "A1A1A1",
        "phone": "9059059059"
    }

我的JSON POST数据是：

{
        "id": 2,
        "times": [
            {
                "appointmentTime": "AAAA"
            },
            {
                "appointmentTime": "time3"
            }
        ],
        "name": "Example Clinic",
        "streetNumber": 123,
        "unitNumber": "",
        "streetName": "Example Street",
        "city": "Exampletown",
        "province": "Ont",
        "country": "Canada",
        "postalCode": "A1A1A1",
        "phone": "9059059059"
    }

我的问题是，我收到一个错误声明：

File"C:\Users\colin\Documents\GitHub\Walk_inExpressAPI\clinics\serializer.py",

line 31, in update

instance.save()

TypeError: save() missing 1 required positional argument: 'self'

我不知道我做错了什么，也不知道该提供什么价值实例.保存（）以更正此错误。我已经检查过那个实例是Clinic类型的对象。你知道吗

我想实现的是每个诊所可以有多个预约时间。他们不会共享AppointTime对象，因为我希望每次预订新预约时都能够删除AppointTime，并且每个诊所都需要自己的可用预约时间集。你知道吗

希望你们能帮我找到正确的方向！谢谢！你知道吗

Answer 1

您应该在APIView中使用方法PUT：

def put(self, request, pk):
   clinics = Clinic.objects.get(pk=pk)
   serializer = ClinicSerializer(clinics, data=request.data)
   if serializer.is_valid():
       serializer.save()
       return Response(serializer.data)
   return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

所以在你身上网址.py应具有主键，以标识要修改的对象：

urlpatterns = [
    url(r'^snippets/$', views.ClinicList.as_view()),
    url(r'^snippets/(?P<pk>[0-9]+)/$', views.ClinicList.as_view()),
]

在更新方法中，更改实例属性，如：

instance.name = validated_data.get('name',instance.name)

试着看看DRF page中的例子。你知道吗