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Optimise down to just the one SQL query for waiting invoices.

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Cuts down on all the unnecessary queries and selects everything in one go.
Down from ~6 queries per invoice
This commit is contained in:
Tom Price
2017-03-01 02:42:39 +00:00
parent 4773b43081
commit 7ec1c726a6
2 changed files with 14 additions and 6 deletions
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12
RIGS/finance.py
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@@ -1,6 +1,7 @@
import cStringIO as StringIO
import datetime
import re
from decimal import Decimal
from django.contrib import messages
from django.core.urlresolvers import reverse_lazy
@@ -31,12 +32,13 @@ class InvoiceIndex(generic.ListView):
def get_queryset(self):
query = self.model.objects.annotate(
cost=Sum(F('event__items__cost') * F('event__items__quantity'), output_field=FloatField()),
payment_count=Count('payment'),
payments=Sum('payment__amount'),
_sum_total=Sum(F('event__items__cost') * F('event__items__quantity'), output_field=FloatField()),
_payment_count=Count('payment'),
_payment_total=Sum('payment__amount'),
).filter(
Q(cost__gt=0.0, payment_count=0) | Q(cost__lt=Value('payments'), cost__gt=Value('payments'))
).select_related('event', 'event__organisation', 'event__person', 'event__venue')
Q(_sum_total__gt=0.0, _payment_count=0) |
Q(_sum_total__lt=Value('_payment_total'), _sum_total__gt=Value('_payment_total'))
).select_related('event', 'event__organisation', 'event__person', 'event__venue', 'event__mic')
return query