author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Wed, 04 Mar 2009 20:47:34 +0000 | |
changeset 1647 | 8bbe06730867 |
parent 1308 | 35b75ffcbb37 |
permissions | -rw-r--r-- |
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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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"""This module contains the Response Model.""" |
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__authors__ = [ |
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'"Todd Larsen" <tlarsen@google.com>', |
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] |
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from google.appengine.ext import db |
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import soc.models.linkable |
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import soc.models.quiz |
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import soc.models.user |
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class Response(soc.models.linkable.Linkable): |
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"""Model of a Response to a Quiz. |
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A Response is the "collection point" for a set of specific Answers to the |
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Questions that make up a Quiz. |
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In addition to the explicit ReferenceProperties in the Response Model, a |
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Response entity participates in these relationships: |
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answers) a 1:many relationship between Answer entities and this |
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Response. Each Answer points to the Response to which it is a part. |
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The collection of Answers that make up a Response is implemented as |
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the 'answers' back-reference Query of the Answer model 'response' |
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reference. |
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proposal) an optional 1:1 relationship where a Proposal placed its |
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Answers to a Quiz associated with the Proposal. This relation is |
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implemented as the 'proposal' back-reference Query of the Proposal |
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Model 'response' reference. |
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""" |
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#: a required many:1 relationship between Responses and a Quiz that |
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#: defines what Questions for which each Response collects Answers |
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#: (that is, there can be many Responses to the same Quiz) |
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quiz = db.ReferenceProperty(reference_class=soc.models.quiz.Quiz, |
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required=True, collection_name="responses") |
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#: a required many:1 relationship with a User that indicates which User |
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#: submitted the Response (answered the Questions in the Quiz) |
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respondent = db.ReferenceProperty( |
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reference_class=soc.models.user.User, required=True, |
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collection_name="responses") |
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# TODO(tlarsen): should 'respondent' be a ReferenceProperty to some Role |
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# instead? |