app/soc/logic/models/document.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sun, 25 Oct 2009 18:43:23 -0700
changeset 3050 5f135cfac194
parent 2427 0dee663d6582
permissions -rw-r--r--
Reworked the redirects to work with the new Request model. Also made use of the collection of Role Views in the Role View in combination with the role property in the Request model, to facilitate the redirects.

#!/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.

"""Document (Model) query functions.
"""

__authors__ = [
  '"Sverre Rabbelier" <sverre@rabbelier.nl>',
  ]


from soc.cache import sidebar
from soc.cache import home
from soc.logic.models import work
from soc.logic.models import linkable as linkable_logic

import soc.models.document
import soc.models.work


class Logic(work.Logic):
  """Logic methods for the Document model
  """

  def __init__(self, model=soc.models.document.Document,
               base_model=soc.models.work.Work, scope_logic=linkable_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 getKeyValuesFromEntity(self, entity):
    """See base.Logic.getKeyNameValues.
    """

    return [entity.prefix, entity.scope_path, entity.link_id]

  def getKeyValuesFromFields(self, fields):
    """See base.Logic.getKeyValuesFromFields.
    """

    return [fields['prefix'], fields['scope_path'], fields['link_id']]

  def getKeyFieldNames(self):
    """See base.Logic.getKeyFieldNames.
    """

    return ['prefix', 'scope_path', 'link_id']

  def isDeletable(self, entity):
    """See base.Logic.isDeletable.
    """

    return not entity.home_for

  def _updateField(self, entity, entity_properties, name):
    """Special logic for Document.

    - Flush the sidebar when a document is featured.
    - Remove the document from the homepage cache when the home_for is updated
    """

    value = entity_properties[name]

    if (name == 'is_featured') and (entity.is_featured != value):
      sidebar.flush()

    home_for = entity.home_for

    if (name != 'home_for') and home_for:
      home.flush(home_for)

    return True


logic = Logic()