Django ORM：如何在 values_list 方法中使用 count 方法？

Question

To simplify things, I need to perform this query:

 select state,count(*) from Airports group by state order by count(*) desc

And the desired return from my query is a dictionary like this:

{
 'state1': value1,
 'state2': value2,
 'state3': value3,
        ...
 'staten': valuen,
}

I did some research and seems I need to use aggregate and annotate but I'm kinda lost in how to perform this with values_list().

Can I use count inside it like this?

Airport.objects.values_list('state', Airport.objects.count()).annotate('state').order_by(-Airport.objects.count())

Answer 1

from django.db.models import Count

Airport.objects.values('state').annotate(count=Count('state')).order_by('-count')