Fix voucher stuff

aleksis/apps/paweljong/schema/event_registration.py

@@ -131,6 +131,7 @@ class SendEventRegistrationMutation(graphene.Mutation):
             event=event,
             person=person,
             medical_information=event_registration["medical_information"],
+            donation=0,
             **school_details,
         )
         for field in event.additional_fields.all():
@@ -145,18 +146,19 @@ class SendEventRegistrationMutation(graphene.Mutation):
 
         registration.cost = event.cost
 
-        if event.max_cost is not None and event.max_cost > 0:
+        if event.max_cost is None or event.max_cost > 0:
             amount = event_registration["payment"]["amount"]
 
             if amount < event.cost:
                 voucher_amount = event.cost - amount
-                discount = voucher_amount / event.cost
-                Voucher.objects.create(
+                discount = voucher_amount / event.cost * 100
+                voucher = Voucher.objects.create(
                     person=person,
                     event=event,
                     used=True,
                     discount=discount,
                 )
+                registration.voucher = voucher
             elif amount > event.cost:
                 registration.donation = amount - event.cost