From ea89abb8da1b9611c0c5e090eb773884818dc007 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 23 Mar 2021 23:53:31 +0100
Subject: [PATCH] Fallback to untaxed amount in PYSON expression about
 non-empty lines

issue10210
review347991002
---
 purchase.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/purchase.py b/purchase.py
index 231396e85c..18b0651416 100644
--- a/purchase.py
+++ b/purchase.py
@@ -276,7 +276,7 @@ class Purchase(
                             ()),
                         ],
                     'invisible': Eval('state') != 'draft',
-                    'readonly': ~Eval('lines', []),
+                    'readonly': ~Eval('lines', Eval('untaxed_amount', 0)),
                     'depends': ['state'],
                     },
                 'confirm': {