add portal_event_registration

portal_event_registration/models/__init__.py

@@ -0,0 +1,3 @@
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import event_registration

portal_event_registration/models/event_registration.py

@@ -0,0 +1,11 @@
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class EventRegistration(models.Model):
+    _inherit = "event.registration"
+
+    # Allow portal users (who only have read access) to post messages
+    # and upload attachments via the portal chatter.
+    _mail_post_access = "read"