更准确地说。我目前正在从Corey Schafers教程系列学习 Flask，我正处于登录身份验证阶段，一切似乎都很好，但在尝试登录后出现此错误：
AttributeError
AttributeError: 'User' object has no attribute 'is_active'
Traceback (most recent call last)
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\app.py", line 2463, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\app.py", line 2449, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\app.py", line 1866, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\panda\Desktop\HDD\Programs\Python3\Lib\site-packages\flask\app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb) …