Hey, I''m using Rails4.rc2 and here is my problem: I have model called Manager, it has_one ManagerContact and ManagerBank. I''m trying to build a form in which Manager can update his ManagerContact and ManagerBank. Controller in charge of profile: ... def profile @manager = current_manager @contact = @manager.manager_contact.nil? ? @manager.build_manager_contact : @manager.manager_contact @bank = @manager.manager_bank.nil? ? @manager.build_manager_bank : @manager.manager_bank end def update_profile current_manager.update_attributes(manager_params) ... redirect_to managers_profile_path end private def manager_params params.require(:manager).permit(:biz_type, :manager_contact => [:first_name, :last_name, :phone_number, :dob], :manager_bank => [:account_holder, :routing, :account] ) end ... In the view(I omitted some inputs to save space) : = form_for @manager, url: managers_edit_path, method: :post do |f| .divider %fieldset %legend Personal Information = f.fields_for @contact do |ff| .inputs = ff.label :first_name = ff.text_field :first_name .divider %fieldset %legend Bank Information = f.fields_for @bank do |ff| .inputs = ff.label :account_holder = ff.text_field :account_holder .divider %fieldset = f.submit ''Save Changes'', class: ''button active'' -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/76fa2411-edbe-4148-a137-cb5ffb0cae84%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.