From 728c40c8cc0d3e8a367d9058ba3e6f4d2b5dba00 Mon Sep 17 00:00:00 2001
From: Sergi Almacellas Abellana <sergi@koolpi.com>
Date: Fri, 28 May 2021 09:06:51 +0200
Subject: [PATCH] Return empty value for payment fields when group has no
 payments

issue10470
review363391002
---
 payment.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/payment.py b/payment.py
index 9f469beec8..02b79bd42a 100644
--- a/payment.py
+++ b/payment.py
@@ -148,7 +148,7 @@ class Group(ModelSQL, ModelView):
         payment = Payment.__table__()
 
         # initialize result and columns
-        result = defaultdict(defaultdict)
+        result = defaultdict(lambda: defaultdict(lambda: None))
         columns = [
             payment.group.as_('group_id'),
             Count(payment.group).as_('payment_count'),