membersystem/src/membership/selectors.py

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from django.contrib.auth.models import User
from membership.models import Membership
from membership.models import SubscriptionPeriod
def get_subscription_periods() -> list[SubscriptionPeriod]:
subscription_periods = SubscriptionPeriod.objects.prefetch_related(
"membership_set",
"membership_set__user",
).all()
return list(subscription_periods)
def get_memberships(
*, user: User | None = None, period: SubscriptionPeriod | None = None
) -> Membership.QuerySet:
memberships = Membership.objects.select_related("membership_type").all()
if user:
memberships = memberships.for_user(user)
if period:
memberships = memberships.filter(period=period)
return memberships