From da5b0daf68a2669cf20467ad229cda6fe1841504 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 6 May 2019 11:34:11 +0200
Subject: [PATCH] Fill ModelView.__change_buttons in __post_setup__

Since the refactoring from a57cd35eec06, we loop only on fields in __setup__
so button_change are not processed. And __change_buttons is not filled.
We fill it in the __post_setup__ when the _buttons dict is filled when values.

issue8329
---
 trytond/model/modelview.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/trytond/model/modelview.py b/trytond/model/modelview.py
index 36238457c2..4c521c79e5 100644
--- a/trytond/model/modelview.py
+++ b/trytond/model/modelview.py
@@ -215,6 +215,13 @@ class ModelView(Model):
                 cls.__rpc__.setdefault(button,
                     RPC(instantiate=0, result=on_change_result))
 
+            for parent_cls in cls.__mro__:
+                parent_meth = getattr(parent_cls, button, None)
+                if not parent_meth:
+                    continue
+                cls.__change_buttons[button] |= getattr(
+                    parent_meth, 'change', set())
+
     @classmethod
     def fields_view_get(cls, view_id=None, view_type='form'):
         '''