django objects values code example

Example 1: 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))

Example 2: django filter exsist

if table.objects.filter(prop='value').count() > 0:

Example 3: django filter values with OR operator

Blog.objects.filter(pk__in=[1, 4, 7])

Example 4: django queryset count

# Returns the total number of entries in the database.
Entry.objects.count()

# Returns the number of entries whose headline contains 'Lennon'
Entry.objects.filter(headline__contains='Lennon').count()