--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/app/soc/logic/model.py Sat Sep 13 22:00:51 2008 +0000
@@ -0,0 +1,56 @@
+#!/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.
+
+"""Helpers functions for updating different kinds of models in datastore.
+"""
+
+__authors__ = [
+ '"Pawel Solyga" <pawel.solyga@gmail.com>',
+ ]
+
+from google.appengine.ext import db
+
+def updateModelProperties(model, **model_properties):
+ """Update existing model entity using supplied model properties.
+
+ Args:
+ model: a model entity
+ **model_properties: keyword arguments that correspond to model entity
+ properties and their values
+
+ Returns:
+ the original model entity with any supplied properties changed
+ """
+ def update():
+ return _unsafeUpdateModelProperties(model, **model_properties)
+
+ return db.run_in_transaction(update)
+
+
+def _unsafeUpdateModelProperties(model, **model_properties):
+ """(see updateModelProperties)
+
+ Like updateModelProperties(), but not run within a transaction.
+ """
+ properties = model.properties()
+
+ for prop in properties.values():
+ if prop.name in model_properties:
+ value = model_properties[prop.name]
+ prop.__set__(model, value)
+
+ model.put()
+ return model
\ No newline at end of file