# HG changeset patch
# Parent a358be0a577b0569831958a8ec1302825c645dee
# Parent  59107edbe5f81bab5e7db172bf2bffa504ce399a

diff --git a/openacademy/models.py b/openacademy/models.py
--- a/openacademy/models.py
+++ b/openacademy/models.py
@@ -28,3 +28,13 @@ class Session(models.Model):
     course_id = fields.Many2one('openacademy.course',
         ondelete='cascade', string="Course", required=True)
     attendee_ids = fields.Many2many('res.partner', string="Attendees")
+
+    taken_seats = fields.Float(string="Taken seats", compute='_taken_seats')
+
+    @api.depends('seats', 'attendee_ids')
+    def _taken_seats(self):
+        for r in self:
+            if not r.seats:
+                r.taken_seats = 0.0
+            else:
+                r.taken_seats = 100.0 * len(r.attendee_ids) / r.seats
diff --git a/openacademy/views/openacademy.xml b/openacademy/views/openacademy.xml
--- a/openacademy/views/openacademy.xml
+++ b/openacademy/views/openacademy.xml
@@ -100,6 +100,7 @@
                                 <field name="start_date"/>
                                 <field name="duration"/>
                                 <field name="seats"/>
+                                <field name="taken_seats" widget="progressbar"/>
                             </group>
                         </group>
                         <label for="attendee_ids"/>
@@ -117,6 +118,7 @@
                 <tree string="Session Tree">
                     <field name="name"/>
                     <field name="course_id"/>
+                    <field name="taken_seats" widget="progressbar"/>
                 </tree>
             </field>
         </record>