From 3ce04738ab1d04dd4b39da7417f9fa5a60e4f4b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 16 Sep 2014 10:08:32 +0200
Subject: [PATCH] Fix computation of depreciation for duration under 1 month

issue4151
review12531002
---
 asset.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/asset.py b/asset.py
index e66e915d4b..ae2b5ade7a 100644
--- a/asset.py
+++ b/asset.py
@@ -305,7 +305,7 @@ class Asset(Workflow, ModelSQL, ModelView):
         # dateutil >= 2.0 has replace __nonzero__ by __bool__ which doesn't
         # work in Python < 3
         if delta == relativedelta.relativedelta():
-            return []
+            return [self.end_date]
         if self.frequency == 'monthly':
             rule = rrule.rrule(rrule.MONTHLY, dtstart=self.start_date,
                 bymonthday=-1)
@@ -329,7 +329,10 @@ class Asset(Workflow, ModelSQL, ModelView):
                     - relativedelta.relativedelta(days=1)]
                 + [l.date for l in self.lines])
             first_delta = dates[0] - start_date
-            last_delta = dates[-1] - dates[-2]
+            if len(dates) > 1:
+                last_delta = dates[-1] - dates[-2]
+            else:
+                last_delta = first_delta
             if self.frequency == 'monthly':
                 _, first_ndays = calendar.monthrange(
                     dates[0].year, dates[0].month)