From 2ad092b5e54fa39a906b38d9240e08b9800ea0da Mon Sep 17 00:00:00 2001
From: Raphael Collet <rco@openerp.com>
Date: Fri, 22 Aug 2014 17:51:20 +0200
Subject: [ADD] doc: new documentation, with training tutorials, and new
 scaffolding

---
 doc/howtos/backend/exercise-constraint-python | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 doc/howtos/backend/exercise-constraint-python

(limited to 'doc/howtos/backend/exercise-constraint-python')

diff --git a/doc/howtos/backend/exercise-constraint-python b/doc/howtos/backend/exercise-constraint-python
new file mode 100644
index 00000000000..c2f0b8a6114
--- /dev/null
+++ b/doc/howtos/backend/exercise-constraint-python
@@ -0,0 +1,24 @@
+# HG changeset patch
+# Parent 7a7d003fe38426a405ce0657a627a139133ec4dd
+
+Index: doc-backend/openacademy/course.py
+===================================================================
+--- doc-backend.orig/openacademy/course.py	2014-08-22 17:02:00.987103191 +0200
++++ doc-backend/openacademy/course.py	2014-08-22 17:02:00.983103191 +0200
+@@ -1,5 +1,5 @@
+ # -*- coding: utf-8 -*-
+-from openerp import api, fields, models
++from openerp import api, fields, models, exceptions
+ 
+ class Course(models.Model):
+     _name = 'openacademy.course'
+@@ -56,3 +56,9 @@
+                 },
+             }
+ 
++    @api.one
++    @api.constrains('instructor_id', 'attendee_ids')
++    def _check_instructor_not_in_attendees(self):
++        if self.instructor_id and self.instructor_id in self.attendee_ids:
++            raise exceptions.ValidationError("A session's instructor can't be an attendee")
++
-- 
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