[IMP] mail: allow to change 'alias_domain_id' in alias mixin

PURPOSE

Allow alias domains to be multiple, notably to be used in a multi company
environment where each company has its own alias domain.

SPECIFICATIONS

As 'alias_domain' is now dynamic and not based on a configuration parameter
it makes sense to be able to change it when having several alias domain.
We now allow writing on 'alias_domain_id' in 'mail.alias.mixin(.optional)'.
Users may now change the alias domain of the alias coming with the mixin
when they have write access on the record.

Task-36879 (Mail: Support Multi Domains Aliases)

Part-of: odoo/odoo#76734

addons/mail/models/mail_alias_mixin_optional.py

@@ -16,7 +16,7 @@ class AliasMixinOptional(models.AbstractModel):
     """
     _name = 'mail.alias.mixin.optional'
     _description = 'Email Aliases Mixin (light)'
-    ALIAS_WRITEABLE_FIELDS = ['alias_name', 'alias_contact', 'alias_defaults', 'alias_bounced_content']
+    ALIAS_WRITEABLE_FIELDS = ['alias_domain_id', 'alias_name', 'alias_contact', 'alias_defaults', 'alias_bounced_content']
 
     alias_id = fields.Many2one('mail.alias', string='Alias', ondelete="restrict", required=False)
     alias_name = fields.Char(related='alias_id.alias_name', readonly=False)

addons/test_mail/tests/test_mail_alias.py

@@ -600,17 +600,14 @@ class TestMailAliasMixin(TestMailAliasCommon):
         self.assertEqual(record.alias_id.alias_contact, 'followers')
 
         record.write({
+            'alias_domain_id': self.mail_alias_domain_c2.id,
             'alias_name': 'better.alias.test',
             'alias_defaults': "{'default_name': 'defaults'}"
         })
+        self.assertEqual(record.alias_domain, self.mail_alias_domain_c2.name)
         self.assertEqual(record.alias_id.alias_name, 'better.alias.test')
         self.assertEqual(record.alias_id.alias_defaults, "{'default_name': 'defaults'}")
 
-        with self.assertRaises(exceptions.AccessError):
-            record.write({
-                'alias_domain_id': self.mail_alias_domain_c2.id,
-            })
-
         with self.assertRaises(exceptions.AccessError):
             record.write({
                 'alias_force_thread_id': 0,