Argument store added to updateEntityProperties.
This argument determines if an entity should be stored in the data model after its properties are updated.
It may be useful, for example, along with tasks (Task Queue API). One may want to make some modifications to an entity during execution of a task, but the developer is sure that at least one new task, which also wants to modify the entity, will be queued, so he or she can just update the entity without saving the changes to the data model, set the entity in memcache and the following task (which is to be executed very shortly) is to retrive the current entity from the memcache (without any expensive calls to the actual data model).
#!/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.
"""Request (Model) query functions.
"""
__authors__ = [
'"Sverre Rabbelier" <sverre@rabbelier.nl>',
'"Lennard de Rijk" <ljvderijk@gmail.com>'
]
import soc.models.request
from soc.logic.helper import notifications
from soc.logic.models import base
from soc.logic.models import linkable as linkable_logic
class Logic(base.Logic):
"""Logic methods for the Request model.
"""
def __init__(self, model=soc.models.request.Request,
base_model=None, scope_logic=linkable_logic):
"""Defines the name, key_name and model for this entity.
"""
super(Logic, self).__init__(model, base_model=base_model,
scope_logic=scope_logic)
def getKeyValuesFromEntity(self, entity):
"""See base.Logic.getKeyNameValues.
"""
return [entity.scope.link_id, entity.role, entity.link_id]
def getKeyValuesFromFields(self, fields):
"""See base.Logic.getKeyValuesFromFields.
"""
return [fields['scope_path'], fields['role'], fields['link_id']]
def getKeyFieldNames(self):
"""See base.Logic.getKeyFieldNames.
"""
return ['scope_path', 'role', 'link_id']
def _onCreate(self, entity):
"""Sends out a message notifying users about the new invite/request.
"""
if entity.status == 'group_accepted':
# this is an invite
notifications.sendInviteNotification(entity)
elif entity.status == 'new':
# this is a request
notifications.sendNewRequestNotification(entity)
super(Logic, self)._onCreate(entity)
def _updateField(self, entity, entity_properties, name):
"""Called when the fields of the request are updated.
Sends out a message depending on the change of status.
"""
value = entity_properties[name]
if name == 'status' and entity.status != value:
if value == 'group_accepted':
# this is an invite
notifications.sendInviteNotification(entity)
elif value == 'new':
# this is a request
notifications.sendNewRequestNotification(entity)
return super(Logic, self)._updateField(entity, entity_properties, name)
logic = Logic()