Grouping Django model entries by day using its datetime field

Question

I\'m working with an Article like model that has a DateTimeField(auto_now_add=True) to capture the publication date (pub_date). This looks something like the following:

Answer 1

Create an extra field that only store date data(not time) and annotate with Count:

Article.objects.extra({'published':"date(pub_date)"}).values('published').annotate(count=Count('id'))

Result will be:

published,count
2012-03-07,5
2012-03-08,9
2012-03-09,1