Python Django模型继承和序列化程序

我想在

NoticeModel

中有几个模型，但目前我只有一个：

class NoticeModel(SpicerModel):
    userId = models.ForeignKey(
        'account.User',
        on_delete=models.CASCADE, null=False, blank=False,
        related_name='notice_user'
    )
    is_read = models.BooleanField(null=False, blank=False, default=False)
    context = models.CharField(max_length=64, null=False, blank=False, choices=NoticeContext.CHOICES)
    message = models.CharField(max_length=255, null=False, blank=False, default='')

class BookingRequestNotice(NoticeModel):
    booking_request = models.ForeignKey(
        BookingRequest,
        on_delete=models.CASCADE,
        null=False,
        blank=False,
        related_name='booking_event_notice'
    )

下面是序列化程序：

class NoticeModelSerializer(serializers.HyperlinkedModelSerializer):
    userId = serializers.ReadOnlyField(source='userId.email')

    class Meta:
        model = NoticeModel
        fields = [
            'id',
            'userId',
            'is_read',
            'context',
            'message'
        ]


class BookingRequestNoticeSerializer(NoticeModelSerializer):

    class Meta:
        model = BookingRequestNotice
        fields = NoticeModelSerializer.Meta.fields + ['booking_request']

要获得所有通知，我需要：

class NoticeList(APIView):
    permission_classes = [permissions.IsAuthenticated]

    def get(self, request):
        user = getCurrentUser(request)
        notices = NoticeModel.objects.filter(userId=user).filter(is_read=False)
        serializer = NoticeModelSerializer(notices, many=True, context={'request': request})
        return Response(serializer.data)

问题是，因为我使用的是

NoticeModelSerializer

，所以我只获取带有公共字段的对象（我不获取

booking\u请求

）。如何返回特定的序列化程序而不必单独查询它们中的每一个