From 11a0a14931cc5cc6f6f2a128f6d02dea93562438 Mon Sep 17 00:00:00 2001
From: Étienne Loks <etienne.loks@iggdrasil.net>
Date: Mon, 5 Feb 2018 12:18:10 +0100
Subject: History: if a previous step do not exist, get the first in history

---
 ishtar_common/models.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ishtar_common/models.py b/ishtar_common/models.py
index 610d92551..674e42538 100644
--- a/ishtar_common/models.py
+++ b/ishtar_common/models.py
@@ -1179,8 +1179,11 @@ class BaseHistorizedItem(FullSearch, Imported, JsonData, FixAssociated):
         historized = self.history.all()
         item = None
         if step:
-            assert len(historized) > step
-            item = historized[step]
+            if len(historized) <= step:
+                # silently return the last step if too far in the history
+                item = historized[len(historized) - 1]
+            else:
+                item = historized[step]
         else:
             for step, item in enumerate(historized):
                 if item.history_date == date:
-- 
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