Question

我正在尝试创建一个检查用户是否已登录的函数。我已将该函数放在mainpage类之外，并且在我尝试使用它之前它没有出现任何错误MainPage类。该函数如下所示：

def LoginCheck():
username = self.request.cookies.get('username') 
password = self.request.cookies.get('password')
if username and password:
    checkq = db.GqlQuery("SELECT * FROM Users WHERE username = :1 AND password = :2", username, password)
    checkresult = checkq.get()
    if checkresult is None:
        self.redirect("/wrong")
else:
    self.redirect("/wrong2")

当我尝试使用它时会返回：

line 14, in LoginCheck
    username = self.request.cookies.get('username')
NameError: global name 'self' is not defined

我做错了什么？

Answer 1

您必须在函数定义中添加“self”。请参阅section 9.3.2 of python's tutorial。

def LoginCheck(self):
    username = self.request.cookies.get('username') 
    password = self.request.cookies.get('password')
    if username and password:
        checkq = db.GqlQuery("SELECT * FROM Users WHERE username = :1 AND password = :2", username, password)
        checkresult = checkq.get()
        if checkresult is None:
            self.redirect("/wrong")
    else:
        self.redirect("/wrong2")

在Google App Engine中使用自制功能

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