commit f339b3b47cb6400c66ab5a84268aa63abcfbb58a
Author: Joshua Peek <josh@joshpeek.com>
Date:   Sun May 17 14:45:06 2009 -0500

    Missed a file from the previous commit

diff --git a/activerecord/lib/active_record/session_store.rb b/activerecord/lib/active_record/session_store.rb
index 3cc4640..c91b943 100644
--- a/activerecord/lib/active_record/session_store.rb
+++ b/activerecord/lib/active_record/session_store.rb
@@ -295,7 +295,7 @@ module ActiveRecord
 
       def set_session(env, sid, session_data)
         Base.silence do
-          record = env[SESSION_RECORD_KEY] ||= find_session(sid)
+          record = get_session_model(env, sid)
           record.data = session_data
           return false unless record.save
 
@@ -309,6 +309,14 @@ module ActiveRecord
 
         return true
       end
+      
+      def get_session_model(env, sid)
+        if env[ENV_SESSION_OPTIONS_KEY][:id].nil?
+          env[SESSION_RECORD_KEY] = find_session(sid)
+        else
+          env[SESSION_RECORD_KEY] ||= find_session(sid)
+        end
+      end
 
       def find_session(id)
         @@session_class.find_by_session_id(id) ||