[FIX] event{._sms}: event: access right for admins of event app

1. Install [Events]

2. On [Settings], create an admin for Events (uncheck all other rights)

3. Click on Events, enter an event

3. Click on [Communication] tab, and try adding a line

Issue: accessing ir.model is blocked
Solution: Find another way

Original fix in 15.0: #112527
Fix of the fix in 15.0: #115881
Original forward-port in 16.0: #115101

This commit is fixing the original forward-port in 16.0 and includes
the fix of the fix.

affected branch: 16.0-master
opw-3163138, 3193659

closes odoo/odoo#116221

Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/event/models/event_mail.py

@@ -84,7 +84,8 @@ class EventMailScheduler(models.Model):
     def set_template_ref_model(self):
         mail_model = self.env['mail.template']
         if self.notification_type == 'mail':
-            self.template_ref = "{},{}".format('mail.template', mail_model.search([('model', '=', 'event.registration')], limit=1).id)
+            record = mail_model.search([('model', '=', 'event.registration')], limit=1)
+            self.template_ref = "{},{}".format('mail.template', record.id) if record else False
 
     event_id = fields.Many2one('event.event', string='Event', required=True, ondelete='cascade')
     sequence = fields.Integer('Display order')

addons/event/views/event_event_views.xml

@@ -79,7 +79,7 @@
                                     <field name="sequence" widget="handle"/>
                                     <field name="notification_type"/>
                                     <field name="template_model_id" invisible="1"/>
-                                    <field name="template_ref" options="{'model_field': 'template_model_id', 'no_quick_create': True}" context="{'filter_template_on_event': True, 'default_model': 'event.registration'}"/>
+                                    <field name="template_ref" options="{'hide_model': True, 'no_quick_create': True}" context="{'filter_template_on_event': True, 'default_model': 'event.registration'}"/>
                                     <field name="interval_nbr" attrs="{'readonly':[('interval_unit','=','now')]}"/>
                                     <field name="interval_unit"/>
                                     <field name="interval_type"/>

addons/event/views/event_mail_views.xml

@@ -12,8 +12,7 @@
                         <group>
                             <field name="event_id"/>
                             <field name="notification_type"/>
-                            <field name="template_model_id" invisible="1"/>
-                            <field name="template_ref" options="{'model_field': 'template_model_id', 'no_quick_create': True}" context="{'filter_template_on_event': True, 'default_model': 'event.registration'}"/>
+                            <field name="template_ref" options="{'hide_model': True, 'no_quick_create': True}" context="{'filter_template_on_event': True, 'default_model': 'event.registration'}"/>
                             <field name="mail_state"/>
                         </group>
                         <group>
@@ -49,8 +48,7 @@
             <tree string="Event Mail Schedulers">
                 <field name="event_id"/>
                 <field name="notification_type"/>
-                <field name="template_model_id" invisible="1"/>
-                <field name="template_ref" options="{'model_field': 'template_model_id', 'no_quick_create': True}" context="{'filter_template_on_event': True, 'default_model': 'event.registration'}"/>
+                <field name="template_ref" options="{'hide_model': True, 'no_quick_create': True}" context="{'filter_template_on_event': True, 'default_model': 'event.registration'}"/>
                 <field name="scheduled_date"/>
                 <field name="mail_count_done"/>
                 <field name="mail_state" widget="event_icon_selection" string=" " nolabel="1"

addons/event_sms/models/event_mail.py

@@ -65,7 +65,8 @@ class EventMailScheduler(models.Model):
         super().set_template_ref_model()
         mail_model = self.env['sms.template']
         if self.notification_type == 'sms':
-            self.template_ref = "{},{}".format('sms.template', mail_model.search([('model', '=', 'event.registration')], limit=1).id)
+            record = mail_model.search([('model', '=', 'event.registration')], limit=1)
+            self.template_ref = "{},{}".format('sms.template', record.id) if record else False
 
 
 class EventMailRegistration(models.Model):