[FIX] account, mail: allow account custom sub model tracking

Steps to reproduce:
- Create an invoice and confirm it
- reset to draft
- change the account of an aml (product sales -> asset)
-> on the log note you will see the detail of the modification `Account: 400000 Product Sales -> 101000 Current Assets`
- connect with Demo
- go on the same invoice

Issue:
You will not see the details of the aml account change

This is problematic since Accountant and auditors should be able to see it.

Cause:
Sub-model tracking is not supported. Although we override this constraint in accounting (refer to https://github.com/odoo/odoo/blob/f56de22f10d09e6e34b25cbff04bbb6bf0823e54/addons/account/models/account_move.py#L5058-L5071), it remains inaccessible for users other than base.system. This is because we attempt to locate the account_id field on the model account.move defined in tracking.mail_message_id.

opw-3632295

closes odoo/odoo#155034

X-original-commit: 20f00a73cb280fd9a3636122c4a8a316abcee0d0
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>
Signed-off-by: Yolann Sabaux (yosa) <yosa@odoo.com>

addons/account/tests/__init__.py

@@ -44,3 +44,4 @@ from . import test_account_partner
 from . import test_setup_wizard
 from . import test_structured_reference
 from . import test_product
+from . import test_mail_tracking_value

addons/account/tests/test_mail_tracking_value.py

@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+
+from odoo import Command
+from odoo.addons.account.tests.common import AccountTestInvoicingCommon
+from odoo.addons.mail.tests.common import MailCommon
+from odoo.tests import Form
+from odoo.tests.common import tagged
+
+
+@tagged('post_install', '-at_install')
+class TestTracking(AccountTestInvoicingCommon, MailCommon):
+
+    def test_aml_change_tracking(self):
+        """ tests that the field_groups is correctly set """
+        account_move = self.env['account.move'].create({
+            'move_type': 'out_invoice',
+            'partner_id': self.partner_a.id,
+            'invoice_line_ids': [Command.create({'product_id': self.product_a.id, 'price_unit': 200.0})]
+        })
+        account_move.action_post()
+        account_move.button_draft()
+        old_value = account_move.invoice_line_ids.account_id
+
+        with Form(account_move) as account_move_form:
+            with account_move_form.invoice_line_ids.edit(0) as line_form:
+                line_form.account_id = self.company_data['default_account_assets']
+        new_value = account_move.invoice_line_ids.account_id
+
+        self.flush_tracking()
+        self.assertTracking(account_move.message_ids, [
+            ('account_id', 'many2one', old_value, new_value),
+        ])
+
+        tracking_value = account_move.message_ids.sudo().tracking_value_ids
+        tracking_value._compute_field_groups()
+
+        self.assertEqual(tracking_value.field_groups, False, "There is no group on account.move.line.account_id")

addons/mail/models/mail_tracking_value.py

@@ -38,7 +38,7 @@ class MailTracking(models.Model):
     @api.depends('mail_message_id', 'field_id')
     def _compute_field_groups(self):
         for tracking in self:
-            model = self.env[tracking.mail_message_id.model]
+            model = self.env[tracking.field_id.model]
             field = model._fields.get(tracking.field_id.name)
             tracking.field_groups = field.groups if field else 'base.group_system'