author | Daniel Diniz <ajaksu@gmail.com> |
Mon, 06 Jul 2009 16:13:27 +0200 | |
changeset 2560 | a944c0169ad8 |
parent 2160 | 3f9dd37d98a8 |
permissions | -rw-r--r-- |
1607 | 1 |
#!/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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"""RankerRoot (Model) query functions. |
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""" |
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__authors__ = [ |
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'"Lennard de Rijk" <ljvderijk@gmail.com>', |
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] |
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from google.appengine.api import datastore |
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from ranklist.ranker import Ranker |
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from soc.logic.models import base |
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1623
8b70d6bb3f8f
Renamed rankerroot to ranker_root and made some changes due to comments.
Lennard de Rijk <ljvderijk@gmail.com>
parents:
1607
diff
changeset
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import soc.models.ranker_root |
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class Logic(base.Logic): |
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"""Logic methods for the RankerRoot model. |
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""" |
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1623
8b70d6bb3f8f
Renamed rankerroot to ranker_root and made some changes due to comments.
Lennard de Rijk <ljvderijk@gmail.com>
parents:
1607
diff
changeset
|
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def __init__(self, model=soc.models.ranker_root.RankerRoot, |
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base_model=None, scope_logic=None): |
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"""Defines the name, key_name and model for this entity. |
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""" |
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super(Logic, self).__init__(model=model, base_model=base_model, |
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scope_logic=scope_logic) |
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def create(self, name, scope, scores, branching_factor): |
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"""Creates a new RankerRoot with a new Ranker. |
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Args: |
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name: the Link ID of the ranker root |
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scope: the entity owning the ranker |
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score_range: A list showing the range of valid scores, in the form: |
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[most_significant_score_min, most_significant_score_max, |
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less_significant_score_min, less_significant_score_max, ...] |
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Ranges are [inclusive, exclusive) |
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branching_factor: The branching factor of the tree. The number of |
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datastore Gets is Theta(1/log(branching_factor)), and the amount of data |
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returned by each Get is Theta(branching_factor). |
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""" |
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ranker = Ranker.Create(scores, branching_factor) |
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fields = {'link_id': name, |
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'scope': scope, |
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2160
3f9dd37d98a8
Use key().id_or_name() instead of key().name()
Sverre Rabbelier <srabbelier@gmail.com>
parents:
1623
diff
changeset
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'scope_path': scope.key().id_or_name(), |
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'root': ranker.rootkey} |
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key_name = self.getKeyNameFromFields(fields) |
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self.updateOrCreateFromKeyName(fields, key_name) |
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def getRootFromEntity(self, entity): |
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"""Returns a Ranker object created from a RankerRoot entity. |
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Args: |
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entity: A RankerRoot entity which the root should be retrieved of |
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""" |
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return Ranker(datastore.Get(entity.key())['root']) |
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logic = Logic() |