From 7614b407ee253fe389ea7c97cb57496446a4aad5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Sun, 17 Dec 2023 23:39:16 +0100
Subject: [PATCH] Convert negative id value as None when set by the client

Domain inversion may force a unique value based on the default value from
PYSON evaluation. In such case it means that no record can be set.

Closes #12799
(grafted from 48463dae759ea1473b258ed905ba2c15fe96e10c)

--HG--
branch : 6.0
---
 sao/src/model.js                                  | 4 ++++
 tryton/tryton/gui/window/view_form/model/field.py | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/sao/src/model.js b/sao/src/model.js
index ba7f6439b8..5553cb08ca 100644
--- a/sao/src/model.js
+++ b/sao/src/model.js
@@ -2073,6 +2073,10 @@
                     rec_name = '';
                 }
             }
+            if ((value < 0) && (this.name != record.group.parent_name)) {
+                value = null;
+                rec_name = '';
+            }
             Sao.setdefault(
                 record._values, this.name + '.', {}).rec_name = rec_name;
             Sao.field.Many2One._super.set_client.call(this, record, value,
diff --git a/tryton/tryton/gui/window/view_form/model/field.py b/tryton/tryton/gui/window/view_form/model/field.py
index 656b843e02..c26989372a 100644
--- a/tryton/tryton/gui/window/view_form/model/field.py
+++ b/tryton/tryton/gui/window/view_form/model/field.py
@@ -490,6 +490,8 @@ class M2OField(Field):
                     self.name + '.', {}).get('rec_name', '')
             else:
                 rec_name = ''
+        if value and value < 0 and self.name != record.parent_name:
+            value, rec_name = None, ''
         record.value.setdefault(self.name + '.', {})['rec_name'] = rec_name
         super(M2OField, self).set_client(record, value,
             force_change=force_change)