# Creating a calculated column named 'discount' on Client table
# Using conditional case statement with nested When -> Then logic
Client.objects.annotate(
discount=Case(
When(account_type=Client.GOLD, then=Value('5%')),
When(account_type=Client.PLATINUM, then=Value('10%')),
default=Value('0%'),
),
).values_list('name', 'discount')