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.
"""Basic Google Account and User (Model) query functions.
"""
__authors__ = [
'"Chen Lunpeng" <forever.clp@gmail.com>',
'"Todd Larsen" <tlarsen@google.com>',
'"Sverre Rabbelier" <sverre@rabbelier.nl>',
]
from google.appengine.api import users
def getCurrentAccount(normalize=True):
"""Returns an optionally normalized version of the current account.
"""
account = users.get_current_user()
return normalizeAccount(account) if (account and normalize) else account
def getCurrentUserId():
"""Returns a unique id of the current user.
"""
return users.get_current_user().user_id()
def normalizeAccount(account):
"""Returns a normalized version of the specified account.
"""
normalized = str(account).lower()
if account.email() == normalized:
return account
return users.User(email=normalized)
def denormalizeAccount(account):
"""Returns a denormalized version of the specified account.
"""
if account.email().find('@') != -1:
return account
domain = account.auth_domain()
denormalized = ''.join([account.email(), '@', domain])
return users.User(email=denormalized)
def isDeveloper(account=None):
"""Returns True if a Google Account is a Developer with special privileges.
Since it only works on the current logged-in user, if account matches the
current logged-in Google Account, the App Engine Users API function
user.is_current_user_admin() is checked. If that returns False, or
account is not the currently logged-in user, False is returned.
This solves the "chicken-and-egg" problem of no User entity having its
is_developer property set, but no one being able to set it.
Args:
account: a Google Account (users.User) object;
if not supplied, the current logged-in user is checked
"""
# Get the currently logged in user
current = getCurrentAccount()
if current and (not account):
# default to the current user
account = current
if not account:
# no Google Account was supplied or is logged in, so an unspecified
# User is definitely *not* a Developer
return False
if (account == current) and users.is_current_user_admin():
# the current account should be checked, and it is in the
# Administration->Developers list in the App Engine console
return True
# account is not current user, or current user is not an admin
return False