app/soc/logic/models/mentor.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sat, 21 Mar 2009 00:30:07 +0000
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Mentors cant resign when mentoring a project/proposal. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed
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#!/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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"""Mentor (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 soc.logic.models import role
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from soc.logic.models import organization as org_logic
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import soc.models.mentor
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import soc.models.role
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DEF_ALREADY_MENTORING_RPOJECT_MSG = "This Mentor is mentoring a Student "\
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    "Project and can therefore not be resigned. Please assign another Mentor."
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DEF_ALREADY_MENTORING_PROPOSAL_MSG = "This Mentor is mentoring a Student "\
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    "Proposal and can therefore not be resigned. Please assign another Mentor."
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class Logic(role.Logic):
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  """Logic methods for the Mentor model.
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  """
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  def __init__(self, model=soc.models.mentor.Mentor,
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               base_model=soc.models.role.Role, scope_logic=org_logic,
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               disallow_last_resign=False):
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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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                                disallow_last_resign=disallow_last_resign)
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  def canResign(self, entity):
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    """Checks if the Mentor is able to resign.
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    Checks if there are no Student Proposals or Student Projects that
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    have this mentor assigned to it.
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    Args:
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      entity: a Mentor entity
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    """
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    from soc.logic.models.student_project import logic as student_project_logic
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    from soc.logic.models.student_proposal import logic as student_proposal_logic
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    fields = {'mentor': entity}
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    student_project_entity = student_project_logic.getForFields(fields,
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                                                                unique=True)
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    if student_project_entity:
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      return DEF_ALREADY_MENTORING_RPOJECT_MSG
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    student_proposal_entity = student_proposal_logic.getForFields(fields,
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                                                                  unique=True)
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    if student_proposal_entity:
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      return DEF_ALREADY_MENTORING_PROPOSAL_MSG
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    return super(Logic, self).canResign(entity)
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logic = Logic()