如何从Django中两个不同的表返回数据？

我的models.py中有两个模型。我需要返回一个包含两个表中数据的json响应。我的视图和序列化器应如何显示？

class Device(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    device_name = models.CharField(max_length=200, null=True, blank=True )
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return str(self.device_name)

class StatusActivity(models.Model):
    OFFLINE = 1
    ONLINE = 2
    STATUS = (
        (OFFLINE, ('Offline')),
        (ONLINE, ('Online')),
    )
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    device_id = models.ForeignKey(Device, related_name='StatusActivity', on_delete=models.CASCADE)
    changed_to = models.PositiveSmallIntegerField(choices=STATUS)
    modified_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return str(self.device_id)

预期回应：

 {
    "device_id":"",
    "device_name":"",
    "changed_to":"",
    "modified_at":"",
  }

更新：我将我的views.py和serializer.py设置如下。我正在查

序列化器

class DeviceSerializer(serializers.ModelSerializer):
    class Meta:
        model = Device
        fields = '__all__'

class StatusActivitySerializer(serializers.ModelSerializer):

    class Meta:
        model = StatusActivity
        fields = '__all__'

class ListSerializer(serializers.Serializer):
    # devices = DeviceSerializer(many=True)
    # activities = StatusActivitySerializer(many=True)

    class Meta:
        model = [Device, StatusActivity]
        fields = ['device_id', 'device_name', 'changed_to', 'modified_at']

Views.py

class DeviceListView(generics.ListAPIView):
    queryset = Device.objects.all()
    serializer_class = ListSerializer

class StatusActivityListView(generics.ListAPIView):
    queryset = StatusActivity.objects.all()
    serializer_class = StatusActivitySerializer

滑稽的人

实际上，您不需要为此使用两个单独的视图，因为您可以轻松地从一个序列化器类序列化关系。看一下这个有用的答案：如何使用Django Rest Framework包括相关的模型字段？

对于您的情况，您可以这样写：

class StatusActivitySerializer(serializers.ModelSerializer):
    device_name = serializers.CharField(source='device_id.device_name')

    class Meta:
        model = StatusActivity
        fields = ('changed_to', 'modified_at', 'device_id', 'device_name')

值得注意的一点：