9-6 用户留言功能

class LeavingMessageSerializer(serializers.ModelSerializer):
    user = serializers.HiddenField(
        default=serializers.CurrentUserDefault()
    )
    add_time = serializers.DateTimeField(read_only=True, format='%Y-%m-%d %H:%M')

    class Meta:
        model = UserLeavingMessage
        fields = ("user", "message_type", "subject", "message", "file", "id", "add_time")

第二步：

class LeavingMessageViewset(mixins.ListModelMixin, mixins.DestroyModelMixin, mixins.CreateModelMixin, viewsets.GenericViewSet):
    """
    list:
        获取用户留言
    create:
        添加留言
    delete:
        删除留言功能
    """
    permission_classes = (IsAuthenticated, IsOwnerOrReadOnly)
    authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)

    serializer_class = LeavingMessageSerializer

    def get_queryset(self):
        return UserLeavingMessage.objects.filter(user=self.request.user)

第三步：

效果：

效果有了，太棒了

这里也可以上传文件

https://www.django-rest-framework.org/api-guide/parsers/#multipartparser