如何获取带有实例作为外键的序列化程序？答案

【问题标题】：How do I get a serializer with an instance as a Foreign key?如何获取带有实例作为外键的序列化程序？
【发布时间】：2020-06-22 14:21:23
【问题描述】：

如何获得一个带有实例作为外键的序列化程序？这是我的模型和序列化器：

class ChargeSchedule(models.Model):
    vehicle = models.OneToOneField(Vehicle, on_delete=models.PROTECT, related_name='vehicle_charge_schedule')
    max = models.FloatField()
    min = models.FloatField()


class ChargeScheduleSerializer(serializers.ModelSerializer):
    class Meta:
        model = ChargeSchedule
        fields = '__all__'

当我尝试验证序列化程序时，我收到一条错误消息“此字段必须是唯一的”：

class ChargeScheduleViewSet(ModelViewSet):
    model = ChargeSchedule
    serializer_class = ChargeScheduleSerializer

    def create(self, request, *args, **kwargs):
        # request.data = {'min': 10, 'max': 100}
        vehicle = request.user.vehicle
        request.data['vehicle'] = vehicle.id
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True) # FAILS HERE, {ValidationError}{'vehicle': [ErrorDetail(string='This field must be unique.', code='unique')]}

如何使用 Vehicle 实例验证此序列化程序？

【问题讨论】：

标签： python-3.x django django-rest-framework django-serializer

【解决方案1】：

试试这个：

def create(self, request, *args, **kwargs):
    # request.data = {'min': 10, 'max': 100}
    vehicle = request.user.vehicle
    ser_data = request.data
    ser_data['vehicle'] = vehicle.id
    serializer = self.get_serializer(data=ser_data)
    serializer.is_valid(raise_exception=True)

【讨论】：