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todolist's Issues

需要安装MySQLdb或者pymysql

我平时使用pymysql链接mysql数据库,电脑上只安装了pymysql,运行项目时报错“No module named 'MySQLdb'”。
看了requirements.txt内又没有列出这个模块,有点摸不着头脑。
折腾了很久才在知乎找到答案。https://www.zhihu.com/question/29719547

app.config['SQLALCHEMY_DATABASE_URI'] 如下定义时会程序会引用MySQLdb模块:
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql://laimingxing:[email protected]/test"

如下定义时才会引用pymysql模块:
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql+pymysql://laimingxing:[email protected]/test"

我仿写了一个基础的系统,但是在登陆的时候出现这样的异常

点击了登陆过后报
Exception
Exception: No user_loader has been installed for this LoginManager. Add one with the 'LoginManager.user_loader' decorator.

查阅了flask的文档关于user_loader的部分
if self.user_callback is None:
raise Exception(
"No user_loader has been installed for this "
"LoginManager. Add one with the "
"'LoginManager.user_loader' decorator.")
不知道为什么会是None,与数据库有关系吗。不知道为什么出现这样的情况。望赐教

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