Django:ValueError无法分配“1”：“Vehicle.driver_id”必须是“driver”实例，但如何在json中传递objrct？

Question

型号：

class Vehicle(models.Model):
    driver_id = models.ForeignKey(Driver, related_name='vehicles', on_delete=models.PROTECT)

序列化程序：

class VehicleSerializer(serializers.Serializer):
    driver_id = serializers.IntegerField()

    def create(self, validated_data):
        return Vehicle.objects.create(**validated_data)

JSON请求：

{
  "vehicle":
  {
    "driver_id": 1
  }
}

给出一条错误消息：

ValueError: Cannot assign "1": "Vehicle.driver_id" must be a "Driver" instance

当我提交这个请求时，它会抛出这个错误。那么如何在JSON请求中传递驱动程序ID呢？

Answer 1

你可以做这样的事，

def create(self, validated_data):
        validated_data['driver_id'] = Driver.objects.get(id=validated_data['driver_id'])
        return Vehicle.objects.create(**validated_data)