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Hand-optimize some queries

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This commit is contained in:
Raphael Michel
2017-10-16 18:03:20 +02:00
parent b4928f662a
commit a2c5ce5ebc
3 changed files with 26 additions and 6 deletions
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10
src/pretix/base/models/items.py
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@@ -839,7 +839,7 @@ class Quota(LoggedModel):
& Q(Q(voucher__valid_until__isnull=True) | Q(voucher__valid_until__gte=now_dt))
) &
self._position_lookup
).values('id').distinct().count()
).count()
def count_pending_orders(self) -> dict:
from pretix.base.models import Order, OrderPosition
@@ -847,23 +847,23 @@ class Quota(LoggedModel):
# This query has beeen benchmarked against a Count('id', distinct=True) aggregate and won by a small margin.
return OrderPosition.objects.filter(
self._position_lookup, order__status=Order.STATUS_PENDING, order__event=self.event, subevent=self.subevent
).values('id').distinct().count()
).count()
def count_paid_orders(self):
from pretix.base.models import Order, OrderPosition
return OrderPosition.objects.filter(
self._position_lookup, order__status=Order.STATUS_PAID, order__event=self.event, subevent=self.subevent
).values('id').distinct().count()
).count()
@cached_property
def _position_lookup(self) -> Q:
return (
( # Orders for items which do not have any variations
Q(variation__isnull=True) &
Q(item__quotas=self)
Q(item_id__in=Quota.items.through.objects.filter(quota_id=self.pk).values_list('item_id', flat=True))
) | ( # Orders for items which do have any variations
Q(variation__quotas=self)
Q(variation__in=Quota.variations.through.objects.filter(quota_id=self.pk).values_list('id', flat=True))
)
)