You need to import Sum first:
from django.db.models import Sum
Question
I have read the documentation related to django aggregation but I am still have trouble figuring out how exactly I can get a sum of points per user.
Here is what I tried:
ModelName.objects.filter(username=rUser.username).aggregate(Sum('points'))
I get the following error:
Request Method: GET
Request URL: http://localhost:8001/mypage/
Django Version: 1.4.8
Exception Type: NameError
Exception Value:
global name 'Sum' is not defined
Solution
You need to import Sum first:
from django.db.models import Sum