From 3db508b45b4aff532b050565da1d6d9b74b4024d Mon Sep 17 00:00:00 2001
From: Étienne Loks <etienne.loks@iggdrasil.net>
Date: Thu, 22 Sep 2016 10:34:59 +0200
Subject: File: fix label when no external_id is defined

---
 archaeological_files/models.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/archaeological_files/models.py b/archaeological_files/models.py
index 9130792f1..42520769a 100644
--- a/archaeological_files/models.py
+++ b/archaeological_files/models.py
@@ -358,7 +358,7 @@ class File(ClosedItem, BaseHistorizedItem, OwnPerms, ValueGetter,
 
     @property
     def reference(self):
-        return self.external_id
+        return self.external_id or u""
 
     def _generate_cached_label(self):
         items = [self.get_town_label(), self.reference]
-- 
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