From 2e5089a5f646f206e1c150b4c4d5adf461f4a1aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Sat, 1 Sep 2018 01:02:04 +0200
Subject: [PATCH] Improve ModelStorage.copy

* Allow callable in copy default
* Support dotted notation in copy default
* Use setdefault in copy
* Copy default when needed
* Do not set default state in copy
* Use callable and dotted notation in copy default

issue5576
issue7648
review72291002
---
 sale.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sale.py b/sale.py
index 9c9c1af7c1..926aa24bae 100644
--- a/sale.py
+++ b/sale.py
@@ -88,8 +88,9 @@ class SaleLine(metaclass=PoolMeta):
     def copy(cls, lines, default=None):
         if default is None:
             default = {}
-        default = default.copy()
-        default['purchase_request'] = None
+        else:
+            default = default.copy()
+        default.setdefault('purchase_request', None)
         return super(SaleLine, cls).copy(lines, default=default)
 
     @property