python - Django ORM, group by day

Question

I am trying to group products by DAY, however date_created is a datetime field.

Product.objects.values('date_created') 
               .annotate(available=Count('available_quantity'))

returns:

[
    {'date_created': datetime.datetime(2012, 4, 14, 13, 3, 6), 'available': 1},
    {'date_created': datetime.datetime(2012, 4, 14, 17, 12, 9), 'available': 1},
    ...
]

I want:

[
    {'date_created': datetime.datetime(2012, 4, 14), 'available': 2}, ...
]

edit: database backend MYSQL

Answer 1

Inspired by this question try this for MySQL

from django.db.models import Count

Product.objects.extra(select={'day': 'date( date_created )'}).values('day') 
               .annotate(available=Count('date_created'))