--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/soc/models/grading_survey_group.py	Tue Jul 07 18:46:47 2009 +0200
@@ -0,0 +1,69 @@
+#!/usr/bin/python2.5
+#
+# Copyright 2009 the Melange authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""GradingSurveyGroup has the ability to link a GradingProjectSurvey to a
+ProjectSurvey for evaluation purposes.
+"""
+
+__authors__ = [
+  '"Lennard de Rijk" <ljvderijk@gmail.com>',
+]
+
+
+from google.appengine.ext import db
+
+from django.utils.translation import ugettext
+
+from soc.models import linkable
+from soc.models.grading_project_survey import GradingProjectSurvey
+from soc.models.project_survey import ProjectSurvey
+
+
+class GradingSurveyGroup(linkable.Linkable):
+  """The GradingSurveyGroups links a ProjectSurvey with a GradingProjectSurvey.
+
+  The purpose of this model is to be able to link two different types of
+  Surveys together so that a decision can be made about whether or not a
+  Student has passed the evaluation. This model will link the Surveys together
+  a GradingRecord will link the SurveyRecords.
+
+  Since this model is only used in GSoC style programs the scope will be set to
+  a Program entity. The link_id can be auto-generated.
+
+  A GradingSurvey group can also work with only a GradingProjectSurvey defined.
+
+  The GradingSurveyGroup can have several GradingRecords attached to it. These
+  will contain matching SurveyRecords for the surveys set in this group, of
+  course only if they are filled in.
+  """
+
+  #: GradingProjectSurvey which belongs to this group.
+  grading_survey = db.ReferenceProperty(
+      GradingProjectSurvey, required=True,
+      collection_name='grading_survey_groups')
+
+  #: non-required ProjectSurvey that belongs to this group.
+  student_survey = db.ReferenceProperty(
+      ProjectSurvey, required=False,
+      collection_name='project_survey_groups')
+
+  #: DateTime when the last GradingRecord update was started for this group.
+  last_update_started = db.DateTimeProperty(
+      verbose_name=ugettext('Last Record update started'))
+
+  #: DateTime when the last GradingRecord update was completed for this group.
+  last_update_complete = db.DateTimeProperty(
+      verbose_name=ugettext('Last Record update completed'))