[FIX] base: Commercial fields not syncing after changing parent_id

Steps to reproduce the bug:

Here are aliases for the used contacts:
- A: Azure Interior
- B: Gemini Furniture
- C: Gemini Furniture, Edwin Hansen
- D: (delivery address for Edwin Hansen)

1. Login on a runbot.
2. Set VAT of A and B to different values.
3. Open C, and create a delivery address: D
4. Check: VAT of D = VAT of B
5. Change the related company of C from B to A.

Bug:

The VAT of C = VAT of A, however VAT of D did not change.

When syncing the commercial fields of a partner, we also sync his childs.

PS: Due to function _compute_commercial_partner, the commercial partner is always updated for
all the childs.

So the condition child.commercial_partner_id != self.commercial_partner_id
is never satisfied in function _children_sync and the commercial fields were
never updated.

opw:3111493

closes odoo/odoo#109074

Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>
Co-authored-by: kmagusiak <>

odoo/addons/base/models/res_partner.py

@@ -448,6 +448,7 @@ class Partner(models.Model):
         if commercial_partner != self:
             sync_vals = commercial_partner._update_fields_values(self._commercial_fields())
             self.write(sync_vals)
+            self._commercial_sync_to_children()
 
     def _commercial_sync_to_children(self):
         """ Handle sync of commercial fields to descendants """

odoo/addons/base/tests/test_res_partner.py

@@ -65,6 +65,29 @@ class TestPartner(TransactionCase):
         with self.assertRaises(UserError, msg="You should not be able to update the company_id of the partner company if the linked user of a child partner is not an allowed to be assigned to that company"), self.cr.savepoint():
             test_partner_company.write({'company_id': company_2.id})
 
+    def test_commercial_field_sync(self):
+        """Check if commercial fields are synced properly: testing with VAT field"""
+        Partner = self.env['res.partner']
+        company_1 = Partner.create({'name': 'company 1', 'is_company': True, 'vat': 'BE0123456789'})
+        company_2 = Partner.create({'name': 'company 2', 'is_company': True, 'vat': 'BE9876543210'})
+
+        partner = Partner.create({'name': 'someone', 'is_company': False, 'parent_id': company_1.id})
+        Partner.flush()
+        self.assertEqual(partner.vat, company_1.vat, "VAT should be inherited from the company 1")
+
+        # create a delivery address for the partner
+        delivery = Partner.create({'name': 'somewhere', 'type': 'delivery', 'parent_id': partner.id})
+        self.assertEqual(delivery.commercial_partner_id.id, company_1.id, "Commercial partner should be recomputed")
+        self.assertEqual(delivery.vat, company_1.vat, "VAT should be inherited from the company 1")
+
+        # move the partner to another company
+        partner.write({'parent_id': company_2.id})
+        partner.flush()
+        self.assertEqual(partner.commercial_partner_id.id, company_2.id, "Commercial partner should be recomputed")
+        self.assertEqual(partner.vat, company_2.vat, "VAT should be inherited from the company 2")
+        self.assertEqual(delivery.commercial_partner_id.id, company_2.id, "Commercial partner should be recomputed on delivery")
+        self.assertEqual(delivery.vat, company_2.vat, "VAT should be inherited from the company 2 to delivery")
+
     def test_lang_computation_code(self):
         """ Check computation of lang: coming from installed languages, forced
         default value and propagation from parent."""