doc/howtos/backend/exercise-onchange

   1 # HG changeset patch
   2 # Parent 8d5573b704b2867788dd6895503f1871c2976a29
   3
   4 Index: doc-backend/openacademy/course.py
   5 ===================================================================
   6 --- doc-backend.orig/openacademy/course.py      2014-08-22 17:01:50.147102793 +0200
   7 +++ doc-backend/openacademy/course.py   2014-08-22 17:01:50.139102793 +0200
   8 @@ -39,3 +39,20 @@
   9          else:
  10              self.taken_seats = 100.0 * len(self.attendee_ids) / self.seats
  11
  12 +    @api.onchange('seats', 'attendee_ids')
  13 +    def _verify_valid_seats(self):
  14 +        if self.seats < 0:
  15 +            return {
  16 +                'warning': {
  17 +                    'title': "Incorrect 'seats' value",
  18 +                    'message': "The number of available seats may not be negative",
  19 +                },
  20 +            }
  21 +        if self.seats < len(self.attendee_ids):
  22 +            return {
  23 +                'warning': {
  24 +                    'title': "Too many attendees",
  25 +                    'message': "Increase seats or remove excess attendees",
  26 +                },
  27 +            }
  28 +