From 75481d902b9c2c9ac855fc45c6a50d2143110cb5 Mon Sep 17 00:00:00 2001
From: Ralf Teusner <ralf.teusner@hpi.de>
Date: Mon, 3 Apr 2017 13:13:58 +0200
Subject: [PATCH] added a nil check for consumer.

---
 app/models/external_user.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/models/external_user.rb b/app/models/external_user.rb
index 538f4997..f1314a59 100644
--- a/app/models/external_user.rb
+++ b/app/models/external_user.rb
@@ -6,7 +6,7 @@ class ExternalUser < ActiveRecord::Base
 
   def displayname
     result = name
-    if(consumer.name == 'openHPI')
+    if(!consumer.nil? && consumer.name == 'openHPI')
       result = Rails.cache.fetch("#{cache_key}/displayname", expires_in: 12.hours) do
          Xikolo::UserClient.get(external_id.to_s)[:display_name]
       end