Question

So … using the Google App Engine User service.

Should I create a local user object:

my_user = users.get_current_user()
if not my_user:
    self.redirect(users.create_login_url(self.request.uri), abort=True)
    return
person = Person.get_current(my_user.user_id()) #Here

or access the user object from the users service anytime? :

my_user = users.get_current_user()
if not my_user:
    self.redirect(users.create_login_url(self.request.uri), abort=True)
    return
#...  code ...
person = Person.get_current(users.get_current_user().user_id()) #And here

or something else? :

helping useres :-)

and of course why. Is usage of users service costly in resources?

Answer 1

A locally scoped user object should be fine for each request.

Make sure my_user is local to your thread and the current request:

• if it’s shared between separate requests, there’s no guarantee that it’s really the same user issuing the request, unless you have some separate session validation.

• different threads can be handling different request, in which case you run into the above problem.