使用视图中的函数更新Flask中的数据库模型

from flask import Flask, request
from flask_sqlalchemy import SQLAlchemy

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

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    email = db.Column(db.String(50))

@app.route('/update_user', methods=['POST'])
def update_user():
    user_id = request.form.get('id')
    user = User.query.get(user_id)
    if user:
        user.name = request.form.get('name')
        user.email = request.form.get('email')
        db.session.commit()
        return '用户信息更新成功'
    else:
        return '用户不存在'

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