Vue + Django 2.0.6 学习笔记 9.6 用户留言功能

迈不过友情╰ 2022-01-12 06:43 194阅读 0赞

新知识点不多

1 建Serializer

from .models import UserLeavingMessage, UserFav
    
    class LeavingMessageSerializer(serializers.ModelSerializer):
    # 跟用户收藏一样 不显示user字段
        user = serializers.HiddenField(
            default=serializers.CurrentUserDefault()
            )
    # 自定义格式化 设置只读。这样在添加留言的时候就不需要添加该字段的内容了
    # format 格式化输出
        add_time = serializers.DateTimeField(read_only=True, format='%Y-%m-%d %H:%M')
        class Meta:
            model = UserLeavingMessage
    # id 是用于删除的时候前端能有对应的id
            fields = ('user', 'msg_type', 'subject', 'message', 'file', 'id', 'add_time')

views.py

from .models import UserFav, UserLeavingMessage
    from .serializers import UserFavSerializer, UserFavDetailSerializer, LeavingMessageSerializer
    
    
    class LeavingMessageViewset(mixins.CreateModelMixin, mixins.ListModelMixin, mixins.DestroyModelMixin, viewsets.GenericViewSet):
        """
        list:
            获取用户留言
        create:
            添加留言
        delete:
            删除留言功能
        """
        serializer_class = LeavingMessageSerializer
        permission_classes = (IsAuthenticated,)
        authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)
    
    # 只返回当前用户的留言信息
        def get_queryset(self):
            return UserLeavingMessage.objects.filter(user=self.request.user)

urls.py

from user_operation.views import UserFavViewset, LeavingMessageViewset
    
    router.register('messages', LeavingMessageViewset, base_name='messages')

models.py

class UserLeavingMessage(models.Model):
    # 添加 upload_to参数
        file = models.FileField(upload_to="message/images/", verbose_name=u'上传的文件', help_text=u'上传的文件')

执行效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NvdWx3eWI_size_16_color_FFFFFF_t_70][]

添加完内容后的get请求结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NvdWx3eWI_size_16_color_FFFFFF_t_70 1][]

这里有一个要说下

前端传递文件给后端 ，而在后端我们啥都没做 他就把前端的文件解析并存储起来了

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NvdWx3eWI_size_16_color_FFFFFF_t_70 2][]

是因为使用了[MultiPartParser][]解析器

具体可参考官方文档

[https://www.django-rest-framework.org/api-guide/parsers/\#multipartparser][MultiPartParser]

完结 撒花

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NvdWx3eWI_size_16_color_FFFFFF_t_70]: /images/20220109/f3d34211fdc74d7b823f4c00bf50d48f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NvdWx3eWI_size_16_color_FFFFFF_t_70 1]: /images/20220109/c51ea4cb6f3748f7b4c41138d84bdf09.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NvdWx3eWI_size_16_color_FFFFFF_t_70 2]: /images/20220109/9db765663c044fa5a0d85de7329887b6.png
[MultiPartParser]: https://www.django-rest-framework.org/api-guide/parsers/#multipartparser