findByAttributes using GUID

I am trying to query a MS-SQL db with the following code


 $userid ="'{C8FF8835-D7A2-446D-98F9-F965102BB7B5}'";


 $model = new User;

 $model->findByAttributes(array('UserId'=>$userid));

but am getting an error from yii. I have tried


 $userid ="C8FF8835-D7A2-446D-98F9-F965102BB7B5";

and other variations as well.

The above works with a different column search that is a plain integer or plain string.

It looks like the ’ is stripped off the variable before being passed into the query.

Does anyone know how to make this work with guid’s?

Try this :


User::model()->findByAttributes(array('UserId'=>$userid));

Thanks for suggestion. That worked fine.