doc/howtos/backend/exercise-onchange

   1 # HG changeset patch
   2 # Parent 8d5573b704b2867788dd6895503f1871c2976a29
   3
   4 Index: addons/openacademy/models.py
   5 ===================================================================
   6 --- addons.orig/openacademy/models.py   2014-08-26 17:26:05.687783287 +0200
   7 +++ addons/openacademy/models.py        2014-08-26 17:26:05.679783287 +0200
   8 @@ -39,3 +39,20 @@
   9              self.taken_seats = 0.0
  10          else:
  11              self.taken_seats = 100.0 * len(self.attendee_ids) / self.seats
  12 +
  13 +    @api.onchange('seats', 'attendee_ids')
  14 +    def _verify_valid_seats(self):
  15 +        if self.seats < 0:
  16 +            return {
  17 +                'warning': {
  18 +                    'title': "Incorrect 'seats' value",
  19 +                    'message': "The number of available seats may not be negative",
  20 +                },
  21 +            }
  22 +        if self.seats < len(self.attendee_ids):
  23 +            return {
  24 +                'warning': {
  25 +                    'title': "Too many attendees",
  26 +                    'message': "Increase seats or remove excess attendees",
  27 +                },
  28 +            }