From 9dd2c7fdc8b593c0cfaa733351b0096cfc5e2f27 Mon Sep 17 00:00:00 2001
From: Fabien Pinckaers <fp@openerp.com>
Date: Fri, 31 Jul 2020 07:25:27 +0000
Subject: [PATCH] [FIX] calendar: don't crash if vobject is not installed

closes odoo/odoo#55236

Signed-off-by: Fabien Pinckaers <fpodoo@users.noreply.github.com>
---
 addons/calendar/models/calendar_attendee.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/addons/calendar/models/calendar_attendee.py b/addons/calendar/models/calendar_attendee.py
index f0009684ebd..a7d5f1ccd0d 100644
--- a/addons/calendar/models/calendar_attendee.py
+++ b/addons/calendar/models/calendar_attendee.py
@@ -118,6 +118,7 @@ class Attendee(models.Model):
                 event_id = attendee.event_id.id
                 ics_file = ics_files.get(event_id)
 
+                attachment_values = []
                 if ics_file:
                     attachment_values = [
                         (0, 0, {'name': 'invitation.ics',