I have two tables Faq and FaqCategory, Faq has an association :category (has_one) to FaqCategory. Category has :id and :title fields. I want to put an options selection helper into my _forms.html (scaffolded) which will provide a list of categories. I tried this one but it didn''t work for me: <%= select("faq", "category", FaqCategory.find_all.collect {|p| [ p.title, p ] }, { :include_blank => true }) %> After selecting an option I got this error: FaqCategory expected, got String app/controllers/faq_editor_controller.rb:35:in `update'' script/server:48 What did I miss? What''s wrong? Gábor