Added created_on DateTime property to request.
As requested in Issue 302.
Patch by: Lennard de Rijk
Reviewed by: to-be-reviewed
#!/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.
"""RankerRoot (Model) query functions.
"""
__authors__ = [
'"Lennard de Rijk" <ljvderijk@gmail.com>',
]
from google.appengine.api import datastore
from ranklist.ranker import Ranker
from soc.logic.models import base
import soc.models.ranker_root
class Logic(base.Logic):
"""Logic methods for the RankerRoot model.
"""
def __init__(self, model=soc.models.ranker_root.RankerRoot,
base_model=None, scope_logic=None):
"""Defines the name, key_name and model for this entity.
"""
super(Logic, self).__init__(model=model, base_model=base_model,
scope_logic=scope_logic)
def create(self, name, scope, scores, branching_factor):
"""Creates a new RankerRoot with a new Ranker.
Args:
name: the Link ID of the ranker root
scope: the entity owning the ranker
score_range: A list showing the range of valid scores, in the form:
[most_significant_score_min, most_significant_score_max,
less_significant_score_min, less_significant_score_max, ...]
Ranges are [inclusive, exclusive)
branching_factor: The branching factor of the tree. The number of
datastore Gets is Theta(1/log(branching_factor)), and the amount of data
returned by each Get is Theta(branching_factor).
"""
ranker = Ranker.Create(scores, branching_factor)
fields = {'link_id': name,
'scope': scope,
'scope_path': scope.key().name(),
'root': ranker.rootkey}
key_name = self.getKeyNameFromFields(fields)
self.updateOrCreateFromKeyName(fields, key_name)
def getRootFromEntity(self, entity):
"""Returns a Ranker object created from a RankerRoot entity.
Args:
entity: A RankerRoot entity which the root should be retrieved of
"""
return Ranker(datastore.Get(entity.key())['root'])
logic = Logic()