aggregate dont find column of annotate

[mateuspadua]

If we try this query, everything works normally

Entry.objects.annotate(num_authors=Count('authors')).aggregate(Avg('num_authors'))

but if we try the one below, it does not find the column authorscount' to the aggregation

Entry.objects.annotate(Count('authors')).aggregate(Avg('authors__count'))

I believe it is a problem because the exception tells us we could use the column 'authorscount'

This is what the exception says:

FieldError: Cannot resolve keyword 'count' into field. Choices are: email, entry, id, name, authorscount <- see the field here.

Thanks.