In this wiki I will show how could wo pass the third parameter to UserIdentity on login authenticate. So we can do separate login authentcation from two or more different models from single login form.
The Yii Framework is very powerful and it provides a lot of functionality right from the pre-built webapp. One of the nice things that is already established for you as a developer is the Login authentication. While the default configuration simply sets it up to run against an array of hard coded usernames and passwords, the Yii Blog Tutorial provides a how to in connecting that login authentication method to a database so you can run your logins against the registered users. Talk about sweet deal.