django aggregation: sum then average

Question

Using django\'s ORM annotate() and/or aggregate(): I want to sum up based on one category field and then average over the category values per date. I tried to do it using two an

Answer 1

I haven't done a deep dive, but I suspect that when you use values() without an annotation, sum_for_field values are being merged with ones that share the same date. I think you need to evaluate the annotation right after you use a values() clause. Maybe something like below will resolve your issue:

result = queryset1.values('date').annotate(avg_final=Avg('sum_for_field'))