app/soc/logic/models/sponsor.py
author Sverre Rabbelier <srabbelier@gmail.com>
Wed, 02 Sep 2009 10:24:10 +0200
changeset 2854 003a84e774e2
parent 2808 0b2d25b1c473
permissions -rw-r--r--
Add support for prefetching fields This makes it possible to specify the fields that should be prefetched as part of a getForFields query. Doing a prefetch on a ReferenceProperty when it is known that the property will be referenced in (almost all) entities is far more efficient than doing the invididual fetches sequentially.

#!/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.

"""Sponsor (Model) query functions.
"""

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


from soc.logic.models import group

import soc.models.group
import soc.models.sponsor


class Logic(group.Logic):
  """Logic methods for the Sponsor model.
  """

  def __init__(self, model=soc.models.sponsor.Sponsor,
               base_model=soc.models.group.Group):
    """Defines the name, key_name and model for this entity.
    """

    super(Logic, self).__init__(model=model, base_model=base_model)

  def isDeletable(self, entity):
    """Returns whether the specified Sponsor entity can be deleted.

    Args:
      entity: an existing Sponsor entity in datastore
    """

    # TODO(pawel.solyga): Check if Sponsor can be deleted (no Hosts, Programs)
    return False


logic = Logic()