Many2many

models/event.py

@@ -22,6 +22,8 @@ class Event(models.Model):
                                ('confirmed', 'Confirmed'),
                                ('canceled', 'Canceled')], default='draft')
 
+    participants_ids = fields.Many2many('coworking.coworker.name', string='Name')
+
 
     @api.constrains('date_end')
     def _check_date_end(self):

views/event_views.xml

@@ -17,6 +17,7 @@
               <field name="duration" />
               <field name="description" />
               <field name="statut" />
+              <fiels name="participant_ids" />
             </group>
           </group>
         </sheet>