From c4e96f4a08db18d700aacb5b04b335b0dea79cc1 Mon Sep 17 00:00:00 2001
From: Sergi Almacellas Abellana <sergi@koolpi.com>
Date: Wed, 4 Feb 2015 23:16:11 +0100
Subject: [PATCH] Improve error message when model does not have any docstring

issue4390
review12921002
---
 trytond/model/model.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/trytond/model/model.py b/trytond/model/model.py
index c0967d89f8..3ad1356b2d 100644
--- a/trytond/model/model.py
+++ b/trytond/model/model.py
@@ -92,6 +92,7 @@ class Model(WarningErrorMixin, URLMixin, PoolBase):
         '''
         Returns the first non-empty line of the model docstring.
         '''
+        assert cls.__doc__, '%s has no docstring' % cls
         lines = cls.__doc__.splitlines()
         for line in lines:
             line = line.strip()