Django: ordering numerical value with order_by

Question

I\'m in a situation where I must output a quite large list of objects by a CharField used to store street addresses.

My problem is, that obviously the data is ordere

Answer 1

In my case i have a CharField with a name field, which has mixed (int+string) values, for example. "a1", "f65", "P", "55" e.t.c ..

Solved the issue by using the sql cast (tested with postgres & mysql), first, I try to sort by the casted integer value, and then by the original value of the name field.

parking_slots = ParkingSlot.objects.all().extra(
        select={'num_from_name': 'CAST(name AS INTEGER)'}
    ).order_by('num_from_name', 'name')

This way, in any case, the correct sorting works for me.