ruby-on-rails - 你如何从另一个模型自动完成？

Question

我在 Auto-complete Associations 关注了 Railscast但我被困在自动完成的一半。我没有使用 Prototype，而是使用 Jquery，我不知道如何让自动完成功能发挥一半的作用。它是怎么做到的？

这是与 Railscast 相比的定制:

产品型号:

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

上面创建了一个虚拟属性，我在其中定义了我的位置模型 :business_name进入location_name对于 <%= f.text_field :location_name %>我的产品形式，因为产品属于位置。

编辑:这是使用 Jquery Autocomplete Gem但我对其他选择持开放态度。

我的产品 :name很有魅力；

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

但是如果我为 :location_name 放这样的东西这不好；

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

Answer 1

很简单，只需要添加attr_accessor，这是我从另一个项目中完成的代码:

<%= form_for(@business_address) do |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

路线.rb

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

确保您在应用程序布局中指定了所需的文件，否则由于某些奇怪的原因它无法工作(rails 3.0.9)

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