How to subtract current date with date from database

Question

I have a Donor table with lastAttendance column. How can I subtract current day with selected lastAttendance date?

d0 = Donor.objects.only("lastAttendance")
d1 = datetime.now()
delta = d1 - d0

Error:

unsupported operand type(s) for -: 'datetime.datetime' and 'QuerySet'

Answer 1

There is a timesince function for Django. Read about it in the docs. https://docs.djangoproject.com/en/1.11/ref/templates/builtins/#timesince