jquery - 如何让 Jquery UI Autocomplete 与 Rails 4 一起工作？

Question

我将 Rails 4.0.2 与 jquery-rails (3.1.0) 和 jquery-ui-rails (4.1.1) gem 一起使用。我正在尝试添加 Autocomplete到搜索表单(使用 Bootstrap 3.1.0):

<%= form_tag products_path, method: :get, class: 'navbar-form navbar-left' do %>
   <div class='form-group'>
     <%= text_field_tag :query, params[:query], id: "navbar-search-input", class: 'form-control', placeholder: 'Product name.....' %>
   </div>
   <%= button_tag(type: 'submit', id: 'navbar-search-btn', class: 'btn btn-default') do %>
     <i class='fa fa-search fa-fw'></i> Search
   <% end %>  
<% end %>

这是我的应用程序 JS 和 CSS 文件:

application.js

//= require jquery
//= require jquery_ujs
//= require jquery.ui.autocomplete
//= require turbolinks
//= require_tree .

var ready;
ready = (function() {
  $('a[href="' + this.location.pathname + '"]').parent().addClass('active');
  $("#navbar-search-input").autocomplete({
    source: '/products/autocomplete.json',
  });
});

$(document).ready(ready);
$(document).on('page:load', ready);

application.css.scss

*= require bootstrap
*= font-kit-rails/ubuntu
*= require jquery.ui.autocomplete
*= require_self
*= require_tree .

比起我的 Controller 和自动完成路由:

class ProductsController < ApplicationController

  def autocomplete
    @products = Product.order(:name)
    respond_to do |format|
      format.html
      format.json { 
        render json: @products.where("name ILIKE ?", "%#{params[:q]}%")
      }
    end
  end

routes.rb

  resources :products do
    collection do
      get 'autocomplete'
    end
  end

现在有了所有这些，我的 json 文件和我在 /products/autocomplete.json 的所有产品都在那里了。问题是，如果我输入任何内容，它会给我一个空白的下拉菜单，如果我单击下拉菜单的任何区域，它将重置搜索表单字段。你知道如何让它发挥作用吗？

编辑

注意:我有一个名为 Rice

的产品

Started GET "/products/autocomplete.json?term=ric" for 127.0.0.1 at 2014-03-19 10:06:51 -0400
Processing by ProductsController#autocomplete as JSON
  Parameters: {"term"=>"ric"}
  Product Load (0.9ms)  SELECT "products".* FROM "products" WHERE (name ILIKE '%%') ORDER BY "products"."name" ASC
Completed 200 OK in 16ms (Views: 14.3ms | ActiveRecord: 0.9ms | Search: 0.0ms)

Answer 1

  def autocomplete
    @products = Product.order(:name).where("name LIKE ?", "%#{params[:term]}%")
    respond_to do |format|
      format.html
      format.json { 
        render json: @products.map(&:name).to_json
      }
    end
  end