app/soc/modules/ghop/models/task.py
author Mario Ferraro <fadinlight@gmail.com>
Sun, 15 Nov 2009 22:12:20 +0100
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permissions -rw-r--r--
GMaps related JS changed to use new google namespace. Google is going to change permanently in the future the way to load its services, so better stay safe. Also this commit shows uses of the new melange.js module. Fixes Issue 634.
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#!/usr/bin/python2.5
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#
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# Copyright 2009 the Melange authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#   http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""This module contains the GHOP Task Model.
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"""
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__authors__ = [
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  '"Madhusudan.C.S" <madhusudancs@gmail.com>',
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  '"Daniel Hans" <daniel.m.hans@gmail.com>',
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  '"Lennard de Rijk" <ljvderijk@gmail.com>',
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]
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from google.appengine.ext import db
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from django.utils.translation import ugettext
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from taggable.taggable import Tag
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from taggable.taggable import Taggable
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from taggable.taggable import tag_property
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import soc.models.linkable
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import soc.models.role
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import soc.models.student
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import soc.models.user
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import soc.modules.ghop.models.program
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class TaskTag(Tag):
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  """Model for storing all Task tags.
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  """
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  order = db.IntegerProperty(required=True, default=0)
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  @classmethod
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  def get_by_scope(cls, scope):
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    """Get the list of tag objects that has the given scope and sorts the
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       result by order values.
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    """
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    tags = db.Query(cls).filter('scope =', scope).order('order').fetch(1000)
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    return tags
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  @classmethod
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  def get_highest_order(cls, scope):
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    """Get a tag with highest order.
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    """
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    tag = db.Query(cls).filter('scope =', scope).order('-order').get()
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    if tag:
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      return tag.order
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    else:
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      return -1
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  @classmethod
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  def update_order(cls, scope, tag_name, order):
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    """Updates the order of the tag.
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    """
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    tag = cls.get_by_scope_and_name(scope, tag_name)
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    if tag:
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      tag.order = order
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      tag.put()
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    return tag
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class TaskTypeTag(TaskTag):
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  """Model for storing of task type tags.
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  """
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  pass
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class TaskDifficultyTag(TaskTag):
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  """Model for storing of task difficulty level tags.
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  """
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  pass
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class TaskArbitraryTag(TaskTag):
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  """Model for storing of arbitrary tags.
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  """
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  def __init__(self, *args, **kwds):
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    """Initialization function.
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    """
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    TaskTag.__init__(self, *args, **kwds)
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    self.auto_delete = True
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class GHOPTask(Taggable, soc.models.linkable.Linkable):
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  """Model for a task used in GHOP workflow.
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  The scope property of Linkable will be set to the Organization to which
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  this task belongs to. A link_id will be generated automatically and will
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  have no specific meaning other than identification.
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  """
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  #: Required field indicating the "title" of the task
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  title = db.StringProperty(required=True,
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                            verbose_name=ugettext('Title'))
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  title.help_text = ugettext('Title of the task')
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   120
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  #: Required field containing the description of the task
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  description = db.TextProperty(required=True,
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   123
                                verbose_name=ugettext('Description'))
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  description.help_text = ugettext('Complete description of the task')
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   125
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   126
  #: Field indicating the difficulty level of the Task. This is not
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  #: mandatory so the it can be assigned at any later stage.
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  #: The options are configured by a Program Admin.
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  difficulty = tag_property('difficulty')
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   130
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   131
  #: Required field which contains the type of the task. These types are
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  #: configured by a Program Admin.
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  task_type = tag_property('task_type')
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   134
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  #: Field which contains the arbitrary tags for the task. These tags can
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  #: be assigned by Org Admins and mentors.
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   137
  arbit_tag = tag_property('arbit_tag')
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   138
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  #: A field which contains time allowed for completing the task (in hours)
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  #: from the moment that this task has been assigned to a Student
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   141
  time_to_complete = db.IntegerProperty(required=True,
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                                        verbose_name=('Time to Complete'))
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   143
  time_to_complete.help_text = ugettext(
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   144
      'Time allowed to complete the task, in hours, once it is claimed')
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   145
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  #: List of Mentors assigned to this task. A Mentor who creates this
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  #: task is assigned as the Mentor by default. An Org Admin will have
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  #: to assign a Mentor upon task creation.
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  mentors = db.ListProperty(item_type=db.Key, default=[])
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   150
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  #: User profile to whom this task has been claimed by. This field
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  #: is mandatory for claimed tasks
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  user = db.ReferenceProperty(reference_class=soc.models.user.User,
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                              required=False,
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                              collection_name='assigned_tasks')
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   156
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  #: Student profile to whom this task is currently assigned to. If the user
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  #: has registered as a Student than this field will be filled in. This field
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  #: is mandatory for all Tasks in the closed state.
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   160
  student = db.ReferenceProperty(reference_class=soc.models.student.Student,
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                                 required=False,
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                                 collection_name='assigned_tasks')
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   163
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   164
  #: Program in which this Task has been created
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   165
  program = db.ReferenceProperty(
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      reference_class=soc.modules.ghop.models.program.GHOPProgram,
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      required=True, collection_name='tasks')
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   168
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  #: Required property which holds the state, the Task is currently in.
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  #: This is a hidden field not shown on forms. Handled by logic internally.
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   171
  #: The state can be one of the following:
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   172
  #: Unapproved: If Task is created by a Mentor, this is the automatically
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  #:   assigned state.
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   174
  #: Unpublished: This Task is not published yet.
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   175
  #: Open: This Task is open and ready to be claimed.
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   176
  #: Reopened: This Task has been claimed but never finished and has been
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   177
  #:   reopened.
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   178
  #: ClaimRequested: A Student has requested to claim this task.
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   179
  #: Claimed: This Task has been claimed and someone is working on it.
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   180
  #: ActionNeeded: Work on this Task must be submitted for review within
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   181
  #:   24 hours.
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   182
  #: Closed: Work on this Task has been completed to the org's content.
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   183
  #: AwaitingRegistration: Student has completed work on this task, but
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   184
  #:   needs to complete Student registration before this task is closed.
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   185
  #: NeedsWork: This work on this Tasks needs a bit more brushing up. This
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   186
  #:   state is followed by a Mentor review.
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   187
  #: NeedsReview: Student has submitted work for this task and it should
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   188
  #:   be reviewed by a Mentor.
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   189
  #: Invalid: The Task is deleted either by an Org Admin/Mentor
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   190
  status = db.StringProperty(
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   191
      required=True, verbose_name=ugettext('Status'),
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   192
      choices=['Unapproved', 'Unpublished', 'Open', 'Reopened',
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   193
               'ClaimRequested', 'Claimed', 'ActionNeeded',
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   194
               'Closed', 'AwaitingRegistration', 'NeedsWork',
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   195
               'NeedsReview', 'Invalid'],
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   196
      default='Unapproved')
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   197
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   198
  #: This field is set to the next deadline that will have consequences for
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   199
  #: this Task. For instance this will store a DateTime property which will
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   200
  #: tell when this Task should be completed.
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   201
  deadline = db.DateTimeProperty(required=False,
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   202
                                 verbose_name=ugettext('Deadline'))
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   203
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   204
  #: Required field containing the Mentor/Org Admin who created this task.
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   205
  #: If site developer has created the task, it is empty.
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   206
  created_by = db.ReferenceProperty(reference_class=soc.models.role.Role,
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   207
                                    required=False,
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   208
                                    collection_name='created_tasks',
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   209
                                    verbose_name=ugettext('Created by'))
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parents:
diff changeset
   210
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   211
  #: Date when the proposal was created
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   212
  created_on = db.DateTimeProperty(required=True, auto_now_add=True,
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   213
                                   verbose_name=ugettext('Created on'))
d943fa182fae Moved the GHOP module into the modules package.
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parents:
diff changeset
   214
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   215
  #: Required field containing the Mentor/Org Admin who last edited this
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parents:
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   216
  #: task. It changes only when Mentor/Org Admin changes title, description,
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   217
  #: difficulty, task_type, time_to_complete. If site developer has modified
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   218
  #: the task, it is empty.
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   219
  modified_by = db.ReferenceProperty(reference_class=soc.models.role.Role,
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   220
                                   required=False,
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parents:
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   221
                                   collection_name='edited_tasks',
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parents:
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   222
                                   verbose_name=ugettext('Modified by'))
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parents:
diff changeset
   223
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parents:
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   224
  #: Date when the proposal was last modified, should be set manually on edit
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parents:
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   225
  modified_on = db.DateTimeProperty(required=True, auto_now_add=True,
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parents:
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   226
                                    verbose_name=ugettext('Modified on'))
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parents:
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   227
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   228
  #: A field which holds the entire history of this task in JSON. The
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parents:
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   229
  #: structure of this JSON string is as follows:
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   230
  #: {
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   231
  #:    timestamp1: {
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   232
  #:                   "user": User reference
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   233
  #:                   "student": Student reference
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  #:                   ...
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  #:                   "state": "Unapproved"
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  #:                   ...
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  #:                   "edited_by": Role reference
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  #:
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  #:               }
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  #:    timestamp2: {
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  #:                   "state": "Unpublished"
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  #:               }
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  #: }
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  #: First dictionary item holds the values for all the properties in this
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  #: model. The subsequent items hold the properties that changed at the
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  #: timestamp given by the key.
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  #: Reference properties will be stored by calling str() on their Key.
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  history = db.TextProperty(required=False, default='')
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  def __init__(self, parent=None, key_name=None,
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               app=None, **entity_values):
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    """Constructor for GHOPTask Model.
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    Args:
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        See Google App Engine APIs.
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    """
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    # explicitly call the AppEngine datastore Model constructor
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    db.Model.__init__(self, parent, key_name, app, **entity_values)
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    # call the Taggable constructor to initialize the tags specified as
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    # keyword arguments
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    Taggable.__init__(self, task_type=TaskTypeTag,
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                      difficulty=TaskDifficultyTag,
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                      arbit_tag=TaskArbitraryTag)