Annotate (group) dates by month/year in Django

Question

Using the Django DateQuerySet I\'m pulling related years for item objects from a Group query.

>>> Group.objec         


        

Answer 1

For anyone finding this after django 1.9 there is now a TruncDate (TruncMonth, TruncYear) that will do this.

from django.db.models.functions import TruncDate

(Group.objects.all().annotate(date=TruncDate('your_date_attr')
                    .values('date')
                    .annotate(Count('items'))

Hope it helps.