odoo/doc/howtos/backend/exercise-computed

# HG changeset patch
# Parent a358be0a577b0569831958a8ec1302825c645dee

Index: doc-backend/openacademy/models.py
===================================================================
--- doc-backend.orig/openacademy/models.py	2014-08-24 12:09:36.289375479 +0200
+++ doc-backend/openacademy/models.py	2014-08-24 12:09:59.961376027 +0200
@@ -28,3 +28,13 @@
     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.one
+    @api.depends('seats', 'attendee_ids')
+    def _taken_seats(self):
+        if not self.seats:
+            self.taken_seats = 0.0
+        else:
+            self.taken_seats = 100.0 * len(self.attendee_ids) / self.seats
Index: doc-backend/openacademy/views/openacademy.xml
===================================================================
--- doc-backend.orig/openacademy/views/openacademy.xml	2014-08-24 12:09:36.289375479 +0200
+++ doc-backend/openacademy/views/openacademy.xml	2014-08-24 12:09:36.285375479 +0200
@@ -98,6 +98,7 @@
                         <field name="start_date"/>
                         <field name="duration"/>
                         <field name="seats"/>
+                        <field name="taken_seats" widget="progressbar"/>
                     </group>
                     <separator string="Attendees" colspan="4"/>
                     <field name="attendee_ids" colspan="4" nolabel="1"/>
@@ -112,6 +113,7 @@
                 <tree string="Session Tree">
                     <field name="name"/>
                     <field name="course_id"/>
+                    <field name="taken_seats" widget="progressbar"/>
                 </tree>
             </field>
         </record>