#!/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.

"""Works (Model) query functions.

"""

__authors__ = [

  '"Todd Larsen" <tlarsen@google.com>',

  ]

from google.appengine.ext import db

from soc.logic import model

import soc.models.work

def getWorksForLimitAndOffset(limit, offset=0, cls=soc.models.work.Work):

  """Returns Works for given offset and limit or None if not found.

  Args:

    limit: max amount of entities to return

    offset: optional offset in entities list which defines first entity to

      return; default is zero (first entity)

    cls: Model class of items to return (including sub-classes of that type);

      default is Work

  """

  query = db.GqlQuery(model.buildOrderedQueryString(

      soc.models.work.Work, derived_class=cls, order_by='title'))

  return query.fetch(limit, offset)