From 5f660cdb283d6227cf38a5192967bb7edd600622 Mon Sep 17 00:00:00 2001
From: rco-odoo <rco@odoo.com>
Date: Wed, 6 Dec 2017 15:05:15 +0100
Subject: [PATCH] [FIX] models: avoid wild prefetching when serializing
 onchange results

We fell on a strange situation in method `onchange`, where some data was
missing from cache when serializing the result. In that case, the
prefetching
overwrites so many stuff in cache that the results of the onchanges are
lost.
Don't let that happen.
---
 odoo/models.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/odoo/models.py b/odoo/models.py
index 9a5fb28218e..2086c137a61 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -5031,10 +5031,11 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
                 subtree = subtree[name]
 
         # collect values from dirty fields
-        result['value'] = {
-            name: self._fields[name].convert_to_onchange(record[name], record, subnames[name])
-            for name in dirty
-        }
+        with env.do_in_onchange():
+            result['value'] = {
+                name: self._fields[name].convert_to_onchange(record[name], record, subnames[name])
+                for name in dirty
+            }
 
         return result