[FIX] account_move

    Addded inherited method _onchange_partner_id to avoid losing invoice narration field when changing companies inside the record

sale_multic_fix/__init__.py

@@ -2,4 +2,5 @@
 # For copyright and license notices, see __manifest__.py file in module root
 # directory
 ##############################################################################
+from . import models
 from . import wizards

sale_multic_fix/models/__init__.py

@@ -0,0 +1,5 @@
+##############################################################################
+# For copyright and license notices, see __manifest__.py file in module root
+# directory
+##############################################################################
+from . import account_move

sale_multic_fix/models/account_move.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, fields, models, _
+
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    @api.onchange('partner_id')
+    def _onchange_partner_id(self):
+        """ when changing company, we prefer to keep original terms just in case they where modified manually on SO / or invoice"""
+        import ipdb; ipdb.set_trace()
+        original_narration = self._origin.narration
+        super(AccountMove, self)._onchange_partner_id()
+        if original_narration and original_narration != self.narration:
+            self.narration = original_narration
+
+    def write(self):
+        import ipdb; ipdb.set_trace()