[Answered ]-How do I get something like repeat customers in Django

Always base your query around the object in which you are primarily interested in:

repeat_customers = Customer.objects.annotate(order_count=Count('order'))\
                                   .filter(order_count__gt=1)

Then if you want to annotate with their totals (you could alternatively do this in the annotation above, I’m just separating the code for readability):

repeat_customers = repeat_customers.annotate(avg_total=Avg('order__total'))

This would be a good use for Django 1.1’s annotate() functionality, which is part of aggregateion. Specifically, you’ll probably want to use the values() function.