Hi.. I use text field with auto complete for my authority_name field which will be fetched from userinfo table and the field name is login. Authority Name ------------ <%=text_field_with_auto_complete :userinfo, :login%> this authority name will be stored in company table. what my problem is i want to validate the above auto complete field... i tried the validates presence of it gets me error. i could not use as <%=f.text_field_with_auto_complete :userinfo, :login%> what is the reason..pls guide me...on the validation Thanks -- Posted via http://www.ruby-forum.com/.