Django: como fazer uma consulta __in sensível a maiúsculas e minúsculas

def get_queryset(self):
queryset
= super(MyModel, self).get_queryset()
states_filter
= [
item
.strip()
for item in config.STATES.split(',')
]
if not states_filter:
MyModel.objects.none()
q
= Q()
for state in states_filter:
q
= q | Q(status__iexact=state)
queryset
= queryset.filter(q)
return queryset

essência relacionada: https://gist.github.com/ctrl-alt-delete/10745911