Get the index of an element in a queryset

Question

I have a QuerySet, let\'s call it qs, which is ordered by some attribute which is irrelevant to this problem. Then I have an object, let\'s call it obj

Answer 1

You can do this using queryset.extra(…) and some raw SQL like so:

queryset = queryset.order_by("id")
record500 = queryset[500]

numbered_qs = queryset.extra(select={
    'queryset_row_number': 'ROW_NUMBER() OVER (ORDER BY "id")'
})

from django.db import connection
cursor = connection.cursor()
cursor.execute(
    "WITH OrderedQueryset AS (" + str(numbered_qs.query) + ") "
    "SELECT queryset_row_number FROM OrderedQueryset WHERE id = %s",
    [record500.id]
    )
index = cursor.fetchall()[0][0]

index == 501 # because row_number() is 1 indexed not 0 indexed