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[wolnelektury.git] / src / annoy / models.py
diff --git a/src/annoy/models.py b/src/annoy/models.py
index 638da5e..e1604bb 100644 (file)
--- a/src/annoy/models.py
+++ b/src/annoy/models.py
@@ -127,7 +127,7 @@ class Banner(models.Model):
         progress = PayUOrder.objects.filter(
             completed_at__gte=self.since,
             completed_at__lte=self.until,
         progress = PayUOrder.objects.filter(
             completed_at__gte=self.since,
             completed_at__lte=self.until,
-        ).aggregate(c=models.Sum('schedule__amount'))['c']
+        ).aggregate(c=models.Sum('schedule__amount'))['c'] or 0
 
         for schedule in Schedule.objects.filter(
                 method='paypal',
 
         for schedule in Schedule.objects.filter(
                 method='paypal',