# HG changeset patch
# Parent a6fe4d3923db1f8f5dff2c39a711a814b0a0f549
# Parent  0687e07f570f363bf5005c6337e0c565a63a6bac
diff --git a/openacademy/models.py b/openacademy/models.py
--- a/openacademy/models.py
+++ b/openacademy/models.py
@@ -62,6 +62,9 @@ class Session(models.Model):
     hours = fields.Float(string="Duration in hours",
                          compute='_get_hours', inverse='_set_hours')
 
+    attendees_count = fields.Integer(
+        string="Attendees count", compute='_get_attendees_count', store=True)
+
     @api.depends('seats', 'attendee_ids')
     def _taken_seats(self):
         for r in self:
@@ -120,6 +123,11 @@ class Session(models.Model):
         for r in self:
             r.duration = r.hours / 24
 
+    @api.depends('attendee_ids')
+    def _get_attendees_count(self):
+        for r in self:
+            r.attendees_count = len(r.attendee_ids)
+
     @api.constrains('instructor_id', 'attendee_ids')
     def _check_instructor_not_in_attendees(self):
         for r in self:
diff --git a/openacademy/views/openacademy.xml b/openacademy/views/openacademy.xml
--- a/openacademy/views/openacademy.xml
+++ b/openacademy/views/openacademy.xml
@@ -157,11 +157,22 @@
             
         
 
+        
+            openacademy.session.graph
+            openacademy.session
+            
+                
+                    
+                    
+                
+            
+        
+
         
             Sessions
             openacademy.session
             form
-            tree,form,calendar,gantt
+            tree,form,calendar,gantt,graph