From 77c6524f69a0aebe467702d1b96f892bb6f6f77f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Wed, 28 Feb 2018 19:01:20 +0100
Subject: [PATCH] Do not apply promotions on return lines

issue7161
review37021002
---
 sale.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sale.py b/sale.py
index a9a95d3f60..be1e440fb6 100644
--- a/sale.py
+++ b/sale.py
@@ -234,7 +234,9 @@ class SalePromotion(ModelSQL, ModelView, MatchMixin):
                     yield category
                     category = category.parent
 
-        if self.unit and line.unit.category != self.unit.category:
+        if line.quantity < 0:
+            return False
+        elif self.unit and line.unit.category != self.unit.category:
             return False
         elif self.products and line.product not in self.products:
             return False