From 1aee8eef09f4473581ac391a950c9ae99832591b Mon Sep 17 00:00:00 2001
From: Martin Edenhofer <me@edenhofer.de>
Date: Sun, 7 Feb 2016 17:17:27 +0100
Subject: [PATCH] Improved stored user identifier.

---
 app/models/observer/ticket/notification/background_job.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/models/observer/ticket/notification/background_job.rb b/app/models/observer/ticket/notification/background_job.rb
index 837950b2d..84d459235 100644
--- a/app/models/observer/ticket/notification/background_job.rb
+++ b/app/models/observer/ticket/notification/background_job.rb
@@ -185,7 +185,11 @@ class Observer::Ticket::Notification::BackgroundJob
 
   def add_recipient_list(ticket, user, channels)
     return if channels.empty?
-    recipient_list = "#{user.email}(#{channels.join(',')})"
+    identifier = user.email
+    if !identifier && identifier == ''
+      identifier = user.login
+    end
+    recipient_list = "#{identifier}(#{channels.join(',')})"
     History.add(
       o_id: ticket.id,
       history_type: 'notification',