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−#!/usr/bin/python2.5
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−#
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−# Copyright 2008 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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−
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−"""This module contains the Task Model."""
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−
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−__authors__ = [
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−  '"Todd Larsen" <tlarsen@google.com>',
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−  '"Sverre Rabbelier" <sverre@rabbelier.nl>',
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−]
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−
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−
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−from google.appengine.ext import db
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−
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−import soc.models.linkable
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−import soc.models.proposal
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−
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−
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−class Task(soc.models.linkable.Linkable):
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−  """Model of a Task, which is a Proposal to be completed by Contributors.
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−
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−  A Task brings along a Proposal that was used to initiate the Task.  A Task
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−  may have a unique collection of Reviews, in addition to those attached to
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−  the original Proposal.
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−
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−  A Task entity participates in the following relationships implemented
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−  as a db.ReferenceProperty elsewhere in another db.Model:
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−
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−   contributors)  a required many:many relationship associating all of
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−     the Contributors to a Task to the specific Task.  See the
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−     TasksContributors model for details.
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−  """
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− 
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−  #: A required many:1 relationship with the Proposal on which the
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−  #: Task is based.  A Task may be based on only a single Proposal,
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−  #: but a Proposal can be the foundation for multiple Tasks. The
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−  #: back-reference in the Proposal model is a Query named 'tasks'.
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−  proposal = db.ReferenceProperty(reference_class=soc.models.proposal.Proposal,
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−                                  required=True,
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−                                  collection_name="tasks")
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−