From f8df38e4e31ac31bea15534f5b71c602f402a3ac Mon Sep 17 00:00:00 2001
From: niv-openerp <nicolas.vanhoren@openerp.com>
Date: Wed, 19 Jan 2011 00:55:46 +0100
Subject: [PATCH] [FIX] Fixed problem  with rrule.

bzr revid: nicolas.vanhoren@openerp.com-20110118235546-wwagvhi2el8qdtut
---
 addons/base_calendar/base_calendar.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/addons/base_calendar/base_calendar.py b/addons/base_calendar/base_calendar.py
index 850691d329c..9af977f8b8e 100644
--- a/addons/base_calendar/base_calendar.py
+++ b/addons/base_calendar/base_calendar.py
@@ -1415,6 +1415,10 @@ e.g.: Every other month on the last Sunday of the month for 10 occurrences:\
         @param context: A standard dictionary for contextual values
         @return: True
         """
+        old_vals = self.read(cr, uid, ids, 'rrule', context)[0]
+        if 'rrule' in vals and not vals['rrule'] and not old_vals['rrule']: 
+            del vals['rrule']
+        
         if context is None:
             context = {}
         if isinstance(ids, (str, int, long)):