Flask-SQLalchemy更新current_user

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager, current_user

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = '数据库连接地址'
app.config['SECRET_KEY'] = '密钥'
db = SQLAlchemy(app)
login_manager = LoginManager(app)

# 定义用户模型
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50), unique=True)
    email = db.Column(db.String(50), unique=True)
    password = db.Column(db.String(100))

# 更新current_user的示例路由
@app.route('/update_user')
def update_user():
    # 确保用户已登录
    if current_user.is_authenticated:
        # 获取当前用户对象
        user = User.query.get(current_user.id)
        # 更新用户信息
        user.username = '新用户名'
        user.email = '新邮箱'
        user.password = '新密码'
        # 提交数据库更改
        db.session.commit()
        return '用户信息已更新'
    else:
        return '用户未登录'

if __name__ == '__main__':
    app.run()