From d7914bfd538d571226ffb76c624e810d991aba4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 13 Mar 2017 23:02:12 +0100
Subject: [PATCH] Do not return None for duration_to_invoice on effort

The method must always return a timedelta or no values because it is summed
later by sum_tree.

issue6346
review31171002
---
 work.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/work.py b/work.py
index ed42b74278..2934599a51 100644
--- a/work.py
+++ b/work.py
@@ -143,7 +143,7 @@ class Work:
     @staticmethod
     def _get_duration_to_invoice_effort(works):
         return dict((w.id, w.effort_duration) for w in works
-            if w.state == 'done' and not w.invoice_line)
+            if w.state == 'done' and not w.invoice_line and w.effort_duration)
 
     @staticmethod
     def _get_duration_to_invoice_progress(works):