Initial commit: Mail packages

odoo-bringout-oca-ocb-mass_mailing/mass_mailing/models/utm_source.py

@@ -0,0 +1,23 @@
+# -*- coding:utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import _, api, models
+
+from odoo.exceptions import UserError
+
+
+class UtmSource(models.Model):
+    _inherit = 'utm.source'
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_except_linked_mailings(self):
+        """ Already handled by ondelete='restrict', but let's show a nice error message """
+        linked_mailings = self.env['mailing.mailing'].sudo().search([
+            ('source_id', 'in', self.ids)
+        ])
+
+        if linked_mailings:
+            raise UserError(_(
+                "You cannot delete these UTM Sources as they are linked to the following mailings in "
+                "Mass Mailing:\n%(mailing_names)s",
+                mailing_names=', '.join(['"%s"' % subject for subject in linked_mailings.mapped('subject')])))