Stats updates

apps/kassa/views.py

@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 from itertools import groupby
 import json
+from datetime import date
 from apps.kassa.models import KassaEvent
 
 from django.conf import settings
@@ -147,7 +148,8 @@ def register_card_and_membership(request):
 def stats_card_sales(request):
     sale_events = [KassaEvent.ADD_OR_RENEW, KassaEvent.NEW_CARD_MEMBERSHIP]
     # TODO filter by start HTTP param
-    events = KassaEvent.objects.filter(event__in=sale_events).values_list('created')
+    start_date = date(year=2015, month=8, day=1)
+    events = KassaEvent.objects.filter(event__in=sale_events, created__gt=start_date).values_list('created')
     grouped = []
     for key, values in groupby(events, key=lambda row: row[0].date()):
         grouped.append({'date': key.isoformat(), 'sales': len(list(values))})