ruby on rails - How do you autocomplete from another model? -

i followed railscast on auto-complete associations stuck @ autocomplete half. not using prototype jquery instead , don't know how autocomplete half working. how done?

this customization compared railscast has:

products model:

def location_name     location.business_name if location end  def location_name=(business_name)     self.location = location.find_by_business_name(business_name) unless business_name.blank? end 

the above makes virtual attribute in defined location models :business_name location_name <%= f.text_field :location_name %> of products form because product belongs location.

edit: using jquery autocomplete gem open alternatives.

my product :name works charm;

<%= f.autocomplete_field :name, autocomplete_product_name_products_path %> 

but if put :location_name no good;

<%= f.autocomplete_field :location_name, autocomplete_product_location_name_products_path %> 

it simple, had add attr_accessor, finished code project:

<%= form_for(@business_address) |f| %>     <%= f.error_messages %>     <%= f.label :name, "address" %><br />     <%= f.autocomplete_field :name, autocomplete_business_address_name_business_addresses_path %>     <%= f.label :business_name, "business" %>     <%= f.autocomplete_field :business_name, autocomplete_business_name_business_addresses_path %>     <%= f.submit %> <% end %   class businessaddress < activerecord::base     attr_accessible :name, :business_name     belongs_to :business     attr_accessor :business_name       def business_name         business.name if business     end      def business_name=(name)         self.business = business.find_or_create_by_name(name) unless name.blank?     end end  class businessaddressescontroller   autocomplete :business, :name, :full => true   autocomplete :business_address, :name, :full => true end 

routes.rb

resources :business_addresses         :autocomplete_business_name, :on => :collection         :autocomplete_business_address_name, :on => :collection end 

make sure specify in application layout files needed or strange reason won't work (rails 3.0.9)

<%= javascript_include_tag "autocomplete-rails", "jquery-ui-1.8.16.custom.min" %>