app/soc/logic/models/student_proposal.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sat, 07 Mar 2009 22:14:04 +0000
changeset 1730 2d877bb10306
parent 1624 1fc2089f4bc9
child 1753 564f3adf4acf
permissions -rw-r--r--
Important roles can now not resign if they are the last in their group. Fixes Issue 288. I've decided to do it outside of the logic because if the need arises to kick the last org admin out of a group we need the ability to do so. 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.

"""Student Proposal (Model) query functions.
"""

__authors__ = [
  '"Lennard de Rijk" <ljvderijk@gmail.com>',
  ]


from soc.logic.models import base
from soc.logic.models import student as student_logic
from soc.logic.models.ranker_root import logic as ranker_root_logic
from soc.models import student_proposal

import soc.models.linkable
import soc.models.student_proposal


class Logic(base.Logic):
  """Logic methods for the Student Proposal model.
  """

  def __init__(self, model=soc.models.student_proposal.StudentProposal,
               base_model=soc.models.linkable.Linkable, 
               scope_logic=student_logic):
    """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 _onCreate(self, entity):
    """Adds this proposal to the organization ranker entity.
    """

    fields = {'link_id': student_proposal.DEF_RANKER_NAME,
              'scope': entity.org}

    ranker_root = ranker_root_logic.getForFields(fields, unique=True)
    ranker = ranker_root_logic.getRootFromEntity(ranker_root) 
    ranker.SetScore(entity.key().name(), [entity.score])

    super(Logic, self)._onCreate(entity)

  def _updateField(self, entity, entity_properties, name):
    """Update the ranker if the score changes and keep the score within bounds.
    """

    value = entity_properties[name]

    if name == 'score':
      # keep the score within bounds
      min_score, max_score = student_proposal.DEF_SCORE

      value = max(min_score, min(value, max_score-1))
      entity_properties[name] = value

      # update the ranker
      fields = {'link_id': student_proposal.DEF_RANKER_NAME,
                'scope': entity.org}

      ranker_root = ranker_root_logic.getForFields(fields, unique=True)
      ranker = ranker_root_logic.getRootFromEntity(ranker_root)
      ranker.SetScore(entity.key().name(), [value])


    return super(Logic, self)._updateField(entity, entity_properties, name)


logic = Logic()