From d0a602e0b56359854ce148c0a7871f4928e160a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20P=C3=A9ters?= <fpeters@entrouvert.com>
Date: Sun, 28 Oct 2018 08:36:22 +0100
Subject: [PATCH] mail: don't crash on undefined mail external id (#27616)

---
 welco/sources/mail/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/welco/sources/mail/__init__.py b/welco/sources/mail/__init__.py
index 60d86e0..0304d62 100644
--- a/welco/sources/mail/__init__.py
+++ b/welco/sources/mail/__init__.py
@@ -37,7 +37,7 @@ class AppConfig(django.apps.AppConfig):
         if not instance.formdata_id:
             return
         source = instance.source
-        if not hasattr(source, 'external_id'):
+        if not getattr(source, 'external_id', None):
             return
         external_id = source.external_id
         if not external_id.startswith('maarch-'):