From 2864441dc73f8838fd54192d2cd05e95618ee238 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Sat, 1 Sep 2018 01:02:03 +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
---
 stock.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/stock.py b/stock.py
index 1a73bd1dc3..caa008830d 100644
--- a/stock.py
+++ b/stock.py
@@ -171,7 +171,8 @@ class Move(metaclass=PoolMeta):
     def copy(cls, moves, default=None):
         if default is None:
             default = {}
-        default = default.copy()
+        else:
+            default = default.copy()
         for prefix in ('in_', 'out_'):
             default.setdefault(prefix + 'anglo_saxon_quantity',
                 getattr(cls, 'default_%sanglo_saxon_quantity' % prefix)())