无法在Google App Engine数据库中获取查询

Google App engine seems very confusing. I am trying to fetch data stored in the server. But nothing is fetched. Down, you will find the code. I donot get what is wrong. Code:

Google App引擎似乎非常令人困惑。我正在尝试获取存储在服务器中的数据。但没有任何东西。向下,你会找到代码。我不知道什么是错的。码:

def get(self):
    user = users.get_current_user()
    if user:
        timetable_query = Timetable.query(ancestor = tt_key(user.email()))
        timetable = timetable_query.fetch(10)

        template_values = {
                'timetable':  timetable
            }
        template = JINJA_ENVIRONMENT.get_template('main.html')
        self.response.write(template.render(template_values))
    else:
        self.redirect(users.create_login_url(self.request.uri))

def post(self):
    user = users.get_current_user()
    if user:
        timetable = Timetable(parent = tt_key(user.email()))
        timetable.owner = user;
        timetable.courses = self.request.get('courses')
        timetable.put()
        self.redirect('/')

The data is going in but not coming out. -

数据进入但没有出来。 -

Edit: The ndb model class is like so:

编辑:ndb模型类是这样的:

class Timetable(ndb.Model):
    owner = ndb.UserProperty()
    courses = ndb.StringProperty(indexed=False)
    shared = ndb.StringProperty(indexed=False)
    date = ndb.DateTimeProperty(auto_now_add=True)

and the template like so:

和模板如下:

var storedCourses = "{{ timetable.courses }}";

1 个解决方案

#1

I recommend that you can use logging to inspect your variables. Just import logging and debug:

我建议您可以使用日志记录来检查变量。只需导入日志记录和调试:

https://developers.google.com/appengine/articles/logging

In this case the problem was in the template which you would have noticed if you had logged the values on your request handler.

在这种情况下,问题出现在模板中,如果您已在请求处理程序上记录了值,则会注意到该模板。

#1