选择了多个设备的组名称

问题描述

我正在尝试为设备组和设备创建一个api。设备组可以具有多个设备，并且我希望具有多个设备的设备组的post api，因为仅当设备被选择并且用户可能选择多个设备然后创建新的组时才会显示组创建。创建组时，这些选定的设备也应该显示为device_list

I am trying to create an api for device group and device. A device group can have multiple devices and i want to have the post api for device group with multiple devices because group creation is shown only when device is selected and user might select multiple devices and then create a new group. That way when group is created, those selected devices should also be shown as device_list

这是我的代码，我不知道如何做帖子请求

Here is my code, i am not sure on how to do post request

class BaseDevice(PolymorphicModel):
  name = models.CharField(max_length=250, blank=False, null=False)
  group = models.ForeignKey('DeviceGroup', related_name="groups", null=True, blank=True)

class Device(BaseDevice):
  description = models.TextField(blank=True, null=True)

class DeviceGroup(models.Model):
    name = models.CharField(max_length=250, blank=False, null=False)  

class DeviceIdSerializer(serializers.ModelSerializer):
    id = serializers.UUIDField(source='token', format='hex', read_only=True)
    class Meta:
        model = Device
        # id is the token of the device and name is the name of the device
        fields = ('id', 'name')

class DeviceGroupSerializer(serializers.ModelSerializer):
    name = serializers.StringRelatedField()
    device_list = DeviceIdSerializer(read_only=False, many=True, required=False, source="groups")
    class Meta:
        model = DeviceGroup
        # name is the name of group created and device_list is the list of devices with id(token) and device name
        fields = ('id', 'name', 'device_list')

    def create(self, validated_data):
        print ('validated_data', validated_data)
        device_list_data = validated_data.pop('device_list')
        group = DeviceGroup.objects.create(**validated_data)
        for device_list in device_list_data:
            BaseDevice.objects.create(group=group, **device_list)
        return group

class DeviceGroupAPIView(APIView):
    permission_classes = (permissions.IsAuthenticated,)

    def get_object(self, user, token):
        try:
            return BaseDevice.objects.filter(owner=user).get(token=token)
        except ObjectDoesNotExist:
            return error.RequestedResourceNotFound().as_response()


    def post(self, request, token=None, format=None):
        device_group_instance = DeviceGroup.objects.get(token=token)
        for device_token in request.data['devices']:
            device = Device.objects.get(token=device_token, owner=request.user)
            device.group = device_group_instance

这是我的api设计

"data": [
        {
            "id": 1,
            "name": "Home",
            "device_list": [
                {
                    "id": "481cfef5a4884e52a63d135967fbc367",
                    "name": "Oxygen Provider"
                },
                {
                    "id": "7eb006d6db50479aa47f887da0d4f10e",
                    "name": "Fan Speed"
                }
            ]
        },
        {
            "id": 2,
            "name": "Business",
            "device_list": []
        }
    ]
}

strong>更新

UPDATE

url（r'^ device_group /（？P [0-9a-f] +）/ add $'，DeviceGroupAPIView.as_view ），name ='device_group'），

url(r'^device_group/(?P[0-9a-f]+)/add$', DeviceGroupAPIView.as_view(), name='device_group'),

推荐答案

我已经更改了代码

class BaseDevice(PolymorphicModel):
    name = models.CharField(max_length=250, blank=False, null=False)
    group = models.ForeignKey('DeviceGroup', related_name="groups", null=True, blank=True)

class Device(BaseDevice):
    description = models.TextField(blank=True, null=True)

class DeviceGroup(models.Model):
    name = models.CharField(max_length=250, blank=False, null=False)

class DeviceIdSerializer(serializers.ModelSerializer):
    id = serializers.UUIDField(source='token', format='hex', read_only=True)
    # token does not exist in your model so this will not be included
    class Meta:
        model = Device
        # id is the token of the device and name is the name of the device
        fields = ('id', 'name')

class DeviceGroupSerializer(serializers.ModelSerializer):
    device_list = DeviceIdSerializer(read_only=False, many=True, required=False, source="groups")
    class Meta:
        model = DeviceGroup
        # name is the name of group created and device_list is the list of devices with id(token) and device name
        fields = ('id', 'name', 'device_list')

    def create(self, validated_data):
        print ('validated_data', validated_data)
        device_list_data = validated_data.pop('groups', [])
        # notice that I pop 'groups' because validation changes the input data 
        # to match the field names
        # Also since it is not required I've added a default value
        group = DeviceGroup.objects.create(**validated_data)
        devices = [BaseDevice(group=group, **device_list) for device_list in device_list_data] 
        BaseDevice.objects.bulk_create(devices)
        # Use bulk create when you have to create multiple objects
        # It hits the db only once instead of multiple times
        return group

class DeviceGroupAPIView(ModelViewSet):
    permission_classes = (permissions.IsAuthenticated,)
    serializer_class = DeviceGroupSerializer
    queryset = DeviceGroup.objects.all()
    # Although I have used ModelViewSet, you could use any other one
    # I used this so that I don't need to write the code for create,
    # update, delete or list


# urls.py
router = routers.DefaultRouter()
router.register(r'device_group', DeviceGroupAPIView, base_name='device_group')
# this gives the following urls
# /device_group/ POST to create, GET to list    
# /device_group/(?<pk>\d+)/  GET to retrieve single DeviceGroup, PATCH/PUT to update it, and DELETE to delete it

这是JSON到POST的结构，用一组设备创建一个新的DeviceGroup

This is the structure of the JSON to POST to create a new DeviceGroup with a bunch of Devices

{
   "name":"Group Name",
   "device_list":[
      {
         "name":"Device 1"
      },
      {
         "name":"Device 2"
      },
      {
         "name":"Device 3"
      }
   ]
}

希望这有助于

此外，您还应该阅读更多关于

Also you should read up more about Django-Rest-Framework

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