Remove inheritance from PolyModel in Answer and Linkable model. Replace PolyModel inheritance with base.ModelWithFieldAttributes.
A little explanation why we are trying to get rid of PolyModel. We decided to use PolyModel in order to get support for model inheritance in App Engine, however as we know this was a hacky workaround which added inheritance_line property to each model. Recent commits which added Linkable model caused our data viewer in admin console to show only one model "Linkable" since all of the classes inherited from it. Basically datastore viewer was useless plus we had a really big mess in datastore since everything was of one kind (Linkable). It's almost like creating one huge table in SQL database. Upcoming commits will eliminate all usage of PolyModel and finally remove PolyModel from our repository. We are still using inheritance however this doesn't modify how models are saved in data store so basically it's like copy and paste of properties from parent models.
Patch by: Pawel Solyga, Sverre Rabbelier
#!/usr/bin/python2.5
#
# Copyright 2008 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.
"""This module contains the Response Model."""
__authors__ = [
'"Todd Larsen" <tlarsen@google.com>',
]
from google.appengine.ext import db
import soc.models.linkable
import soc.models.quiz
import soc.models.user
class Response(soc.models.linkable.Linkable):
"""Model of a Response to a Quiz.
A Response is the "collection point" for a set of specific Answers to the
Questions that make up a Quiz.
In addition to the explicit ReferenceProperties in the Response Model, a
Response entity participates in these relationships:
answers) a 1:many relationship between Answer entities and this
Response. Each Answer points to the Response to which it is a part.
The collection of Answers that make up a Response is implemented as
the 'answers' back-reference Query of the Answer model 'response'
reference.
proposal) an optional 1:1 relationship where a Proposal placed its
Answers to a Quiz associated with the Proposal. This relation is
implemented as the 'proposal' back-reference Query of the Proposal
Model 'response' reference.
"""
#: a required many:1 relationship between Responses and a Quiz that
#: defines what Questions for which each Response collects Answers
#: (that is, there can be many Responses to the same Quiz)
quiz = db.ReferenceProperty(reference_class=soc.models.quiz.Quiz,
required=True, collection_name="responses")
#: a required many:1 relationship with a User that indicates which User
#: submitted the Response (answered the Questions in the Quiz)
respondent = db.ReferenceProperty(
reference_class=soc.models.user.User, required=True,
collection_name="responses")
# TODO(tlarsen): should 'respondent' be a ReferenceProperty to some Role
# instead?