Hi,all! I want to submit ''address'' value in the location model . And I want to submit ''address'' value in the room/_form.html.erb . So,I am using nested_form but it doesn''t work. Please teach me some advice. Error message is like this. [code] ActiveRecord::AssociationTypeMismatch (Location(#70291171806880) expected, got ActiveSupport::HashWithIndifferentAccess(#70291193905860)): app/controllers/rooms_controller.rb:44:in `create'' [/code] My db/schema is following... [code] ... create_table "locations", :force => true do |t| t.string "address" t.float "latitude" t.float "longitude" t.datetime "created_at" t.datetime "updated_at" end create_table "rooms", :force => true do |t| t.string "room_name" t.text "description" t.string "pref_name" t.string "email" t.integer "user_id" t.integer "price" t.datetime "created_at" t.datetime "updated_at" end ... [/code] Room model is ... [code] class Room < ActiveRecord::Base belongs_to :location belongs_to :user accepts_nested_attributes_for :location,:allow_destroy => true ... [/code] #rooms/_form.html.erb [code] <div> <%= f.fields_for @location do |loc| %> <%= loc.label "address" %><br/> <%= loc.text_field :address %> <% end %> </div> [/code] # rooms_controller.rb [code] def new @room = current_user.rooms.build @location = current_user.locations.build respond_to do |format| format.html # new.html.erb end end .... def create @room = current_user.rooms.build(params[:room]) @location = current_user.locations.build(params[:location]) respond_to do |format| if @room.save format.html { redirect_to(@room, :notice => ''Room was successfully created.'') } else format.html { render :action => "new" } end end end [/code] Thanks! -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.