python - 如何使用 Flask 检索 session 数据？

Question

我有 flask+wtforms 应用程序。我可以在 login() 中看到用户对象存储为

  if user:
   if user.verify_password(form.password.data):
    flash('You have been logged in')
    user.logins += 1

    db.session.add(History(user.uid))
    db.session.commit()

    session['user'] = user

现在我想检索用户

if 'user' in session:
       User=session.get('user')
       print User.nickname ###<< how to retrieve specific object member?

失败并显示如下消息:

Instance <User at 0x8e5a64c> is not bound to a Session; attribute refresh operation cannot proceed

Answer 1

很简单。如果你想检索一个特定的对象，只需在 session 中添加变量的名称，例如 session ['昵称']。

您可以通过执行 session['nickname'] = nickname 以相同的方式设置变量。

在您的情况下，您可以将其更改为以下内容

if 'user' in session:
    user = session['user']
    print user

if 'nickname' in session:
    nickname = session['nickname']
    print nickname

这是我用于登录的函数的简化版本。

@app.route('/login', methods=['POST'])
def login():
    """Authenticate User"""
    username = request.form['username'].strip()
    nickname = request.form['nickname'].strip()
    password = request.form['password']
    try:
        if Auth().VerifyLogin(username, password):
            session['username'] = username
            session['nickname'] = nickname
        else:
            # failed to login, do something.
    except Exception as why:
        app.logger.critical('.....')