From f867fc9269c96643167a1f45e37f7a6ac25ab236 Mon Sep 17 00:00:00 2001
From: Fabien Pinckaers <fp@openerp.com>
Date: Fri, 20 Nov 2015 18:21:32 +0100
Subject: [PATCH] [IMP] better error message (draft quotation does not exist),
 allow deleting canceled quotations

---
 addons/sale/sale.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index c7bfe679b14..76cb0b1a3c2 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -148,8 +148,8 @@ class SaleOrder(models.Model):
     @api.multi
     def unlink(self):
         for order in self:
-            if order.state != 'draft':
-                raise UserError(_('You can only delete draft quotations!'))
+            if order.state not in ('draft', 'cancel'):
+                raise UserError(_('You can not delete a quotation sent or a sale order! Try to cancel it before.'))
         return super(SaleOrder, self).unlink()
 
     @api.multi