X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/f59de09387c7ceb7d6ab2ccf6ea25cb4be8dacb5..f1d541634355755e03c883feda7f6e72782542e9:/src/annoy/models.py

diff --git a/src/annoy/models.py b/src/annoy/models.py
index 638da5e86..e1604bbad 100644
--- 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,
-        ).aggregate(c=models.Sum('schedule__amount'))['c']
+        ).aggregate(c=models.Sum('schedule__amount'))['c'] or 0
 
         for schedule in Schedule.objects.filter(
                 method='paypal',