Originally posted this to the pragmatic studio list. No response there, so I''m giving it a shot here. I''m working on my first post-class Rails app - a rewritten replacement for a link-collection site. Right now, it''s a very basic setup with a Categories table (acts_as_tree), and a Links table. Table and foreign keys appear to be set up fine. I generated a scaffold and did some minor modification. Categories has_many :links, and Links belongs_to :category. I''ve got a helper function that generates a select() statement like select(:link, :category). That creates HTML that looks like: <select id="link_category" name="link[category]"> And the option value is the numeric category id number. When I submit the form, I get an ActiveRecord error that reads: Category expected, got String In the request parameters, I see I''m getting "category" => "8". I assume it''s expecting a Category object instead of just the string "8". In my scaffold-built controller, the create method is doing the stock: @link = Link.new(params[:link]) @link.save Does the scaffold not handle this type of interaction by default? Do I need to change that to do something like a @category Category.find(params[:category]), and replace the value for "category" in the hash with that object? What''s the scoop on how to make those two classes happy with each other? --Wade ------------------------ Yahoo! Groups Sponsor --------------------~--> AIDS in India: A "lurking bomb." Click and help stop AIDS now. http://us.click.yahoo.com/VpTY2A/lzNLAA/yQLSAA/nhFolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/pragstudiorails-alumni/ <*> To unsubscribe from this group, send an email to: pragstudiorails-alumni-unsubscribe-hHKSG33TihhbjbujkaE4pw@public.gmane.org <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/