Answers for "__in django"

pass in queryset as filter django

users = UserClasses.objects.filter(class_id=data['class_id'])
user_details = User.objects.filter(id__in=users.values_list('id', flat=True))

objects.filter django

>>> Entry.objects.filter(blog_id=4)

django queryset exists

if some_queryset.exists():
    print("There is at least one object in some_queryset")

django 3.0 queryset examples

>>> Entry.objects.filter(
...     headline__startswith='What'
... ).exclude(
...     pub_date__gte=datetime.date.today()
... ).filter(
...     pub_date__gte=datetime.date(2005, 1, 30)
... )