Q in django model code example
Example 1: django reverse queryset
queryset = reversed(Collection.objects.filter(pk__in = li))
Example 2: django q objects
from django.db.models import Q
obj, created = Person.objects.filter(
Q(first_name='Bob') | Q(first_name='Robert'),
).get_or_create(last_name='Marley', defaults={'first_name': 'Bob'})