尝试使用 python、flask 和 sqlalchemy 构建待办事项列表应用程序；在为数据库创建表时，我收到此错误
我运行这个命令
'from app import db'
我收到此警告：
C:\Users\Mahmoud\.virtualenvs\to-do_list_flask-Gr0Wv-V5\lib\site-packages\sqlalchemy\ext\declarative\base.py:361: SAWarning: Attribute 'item' on class <class 'app.todo'> appears to be a non-schema 'sqlalchemy.sql.column()' object; this won't be part of the declarative mapping
% (key, cls)
C:\Users\Mahmoud\.virtualenvs\to-do_list_flask-Gr0Wv-V5\lib\site-packages\sqlalchemy\ext\declarative\base.py:361: SAWarning: Attribute 'date' on class <class 'app.todo'> appears to be a non-schema 'sqlalchemy.sql.column()' object; this won't be part of the declarative mapping
% (key, cls)
如果我执行db.create_all()该表只有一个 id 列
我的脚本：
from flask import Flask, render_template, request
from flask_sqlalchemy import SQLAlchemy
app …