[FIX] account_multic_fix: don't change journal if invoice is cancelled

closes #112

Ticket: 56784
Signed-off-by: Katherine Zaoral <kz@adhoc.com.ar>

account_multic_fix/README.rst

@@ -16,6 +16,7 @@ Account Multi Company Fixes
 
 #. Add check_company on account.move and account.move.line (backported from odoo master https://github.com/odoo/odoo/commit/847889b49768db290f86ab5c5f48e8134fa29266) (TODO remove on v14)
 #. Some fixes so that you can change to a journal of different company and everthing is updated correctly
+#. Don´t allow to change the journal if the state of the invoice is cancelled.
 
 TODO (Viejo):
 arreglar para los statments, por ahora no pudismo hacer que nade bien, sobre todo la parte de que

account_multic_fix/models/account_move.py

@@ -2,7 +2,8 @@
 # For copyright and license notices, see __manifest__.py file in module root
 # directory
 ##############################################################################
-from odoo import models, api
+from odoo import models, api, _
+from odoo.exceptions import UserError
 
 
 class AccountMove(models.Model):
@@ -76,3 +77,10 @@ def _compute_suitable_journal_ids(self):
             company_ids = self.env.companies.ids
             domain = [('company_id', 'in', company_ids), ('type', '=', journal_type)]
             m.suitable_journal_ids = self.env['account.journal'].search(domain)
+
+    @api.constrains('journal_id')
+    def _check_invoice_state(self):
+        """This method don´t allow to change the journal if the state of the invoice is 'cancel'"""
+        for inv in self:
+            if inv.state == 'cancel':
+                raise UserError(_('It is not possible to change the journal if the invoice is cancelled. You can edit it changing the invoice state to draft.'))