[FIX] account: prevent deletion partner

Steps to reproduce:
- Create a partner-individual, assign to a company
- Create an invoice and set the new partner as the customer
- Go to the partner view
- Delete it

Issue:
- It is possible to delete it

Cause:
The constraint in "account.move.line" uses the "commercial_partner_id" as the partner

Solution:
- Prevent the unlink if the partner is used in 'account.move' -> To delete in Master
- add "ondelete='restrict' for partner and commercial_parner in 'account.move'

opw-2858789

closes odoo/odoo#94591

X-original-commit: 7d37f5ef7ecd87aea666d96dc8200a74c8dc0b31
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/i18n/account.pot

@@ -10522,6 +10522,12 @@ msgstr ""
 msgid "Reconciliation Parts"
 msgstr ""
 
+#. module: account
+#: code:addons/account/models/partner.py:0
+#, python-format
+msgid "Record cannot be deleted. Partner used in Accounting"
+msgstr ""
+
 #. module: account
 #: code:addons/account/models/account_tax.py:0
 #, python-format

addons/account/models/account_move.py

@@ -200,9 +200,9 @@ class AccountMove(models.Model):
     partner_id = fields.Many2one('res.partner', readonly=True, tracking=True,
         states={'draft': [('readonly', False)]},
         check_company=True,
-        string='Partner', change_default=True)
+        string='Partner', change_default=True, ondelete='restrict')
     commercial_partner_id = fields.Many2one('res.partner', string='Commercial Entity', store=True, readonly=True,
-        compute='_compute_commercial_partner_id')
+        compute='_compute_commercial_partner_id', ondelete='restrict')
     country_code = fields.Char(related='company_id.account_fiscal_country_id.code', readonly=True)
     user_id = fields.Many2one(string='User', related='invoice_user_id',
         help='Technical field used to fit the generic behavior in mail templates.')

addons/account/models/partner.py

@@ -9,7 +9,7 @@ from psycopg2 import sql, DatabaseError
 from odoo import api, fields, models, _
 from odoo.osv import expression
 from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT
-from odoo.exceptions import ValidationError
+from odoo.exceptions import ValidationError, UserError
 from odoo.addons.base.models.res_partner import WARNING_MESSAGE, WARNING_HELP
 
 _logger = logging.getLogger(__name__)
@@ -621,6 +621,20 @@ class ResPartner(models.Model):
                     vals['supplier_rank'] = 1
         return super().create(vals_list)
 
+    @api.ondelete(at_uninstall=False)
+    def _unlink_if_partner_in_account_move(self):
+        """
+        Prevent the deletion of a partner "Individual", child of a company if:
+        - partner in 'account.move'
+        - state: all states (draft and posted)
+        """
+        moves = self.sudo().env['account.move'].search_count([
+            ('partner_id', 'in', self.ids),
+            ('state', 'in', ['draft', 'posted']),
+        ])
+        if moves:
+            raise UserError(_("The partner cannot be deleted because it is used in Accounting"))
+
     def _increase_rank(self, field, n=1):
         if self.ids and field in ['customer_rank', 'supplier_rank']:
             try: