diff -r ba3309b2fd30 -r c31cfbf1a20f app/soc/logic/models/presence.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/soc/logic/models/presence.py	Fri Nov 21 10:46:15 2008 +0000
@@ -0,0 +1,58 @@
+#!/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.
+
+"""Presence (Model) query functions.
+"""
+
+__authors__ = [
+  '"Sverre Rabbelier" <sverre@rabbelier.nl>',
+  '"Lennard de Rijk" <ljvderijk@gmail.com>'
+  ]
+
+
+from soc.logic.models import base
+
+import soc.models.presence
+
+
+class Logic(base.Logic):
+  """Logic methods for the Presence model.
+  """
+
+  def __init__(self):
+    """Defines the name, key_name and model for this entity.
+    """
+    base.Logic.__init__(self, soc.models.presence.Presence)
+  
+  def getKeyValues(self, entity):
+    """See base.Logic.getKeyNameValues.
+    """
+
+    return [entity.scope_path, entity.link_id]
+
+  def getKeyValuesFromFields(self, fields):
+    """See base.Logic.getKeyValuesFromFields.
+    """
+
+    return [fields['scope_path'], fields['link_id']]
+
+  def getKeyFieldNames(self):
+    """See base.Logic.getKeyFieldNames.
+    """
+
+    return ['scope_path', 'link_id']
+
+logic = Logic()