如何在Rails 3中使用js.erb模板和Ajax?

时间:2011-04-04 12:10:41

标签: jquery ajax ruby-on-rails-3 routing

我有一个应用程序,我想在后端进行一些计算,然后通过Ajax在前端显示结果。我没有使用ActiveRecord。

我显示了JavaScript代码而不是执行它。 Webrick在按下转换按钮后说:

Started POST "/site/convert.js" for <ip address> at 2011-04-05 01:37:09 +0300
  Processing by SiteController#convert as JS
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"K9De9/J5bsnOxqLdmvl02sOVgmU3c4gEZ/n7DBwJdrw=", "radix"=>"10", "number"=>"2", "commit"=>"Convert"}
Rendered site/convert.js.erb (0.5ms)
Completed 200 OK in 28ms (Views: 22.9ms)

为什么JavaScript代码没有被执行?

site_controller.rb:

class SiteController < ApplicationController
  def index
  end

  def convert
    number = params[:number]
    from = params[:radix]
    @decimal = Converter::convert(number, from.to_i, 10)
    @hexadecimal = Converter::convert(number, from.to_i, 16)
    @binary = Converter::convert(number, from.to_i, 2)
  end

end

站点/ index.html.erb:

<%= form_tag site_convert_path(:format => :js), :id => 'conversion', :remote => true do %>
    <%= radio_button_tag 'radix', 10, true %> Decimal
    <%= radio_button_tag 'radix', 16 %> Hexadecimal
    <%= radio_button_tag 'radix', 2 %> Binary
    <%= number_field_tag 'number', '', :size => '20', :min => 0 %>
    <%= submit_tag 'Convert' %>
<% end %>

<button id="convert" type="button">Convert</button>

<table>
  <thead>Conversions</thead>
  <tr>
    <th>Decimal</th>
    <th>Hexadecimal</th>
    <th>Binary</th>
  </tr>
  <tr>
    <td id="decimal_converted"></td>
    <td id="hexadecimal_converted"></td>
    <td id="binary_converted"></td>
  </tr>

</table>

站点/ convert.js.erb:

$('#decimal_converted').text("<%= @decimal %>");
$('#hexadecimal_converted').text("<%= @hexadecimal %>");
$('#binary_converted').text("<%= @binary %>");

routes.rb中:

Conversions::Application.routes.draw do
  root :to => 'site#index'
  post 'site/convert'
end

1 个答案:

答案 0 :(得分:2)

问题解决了。 Rails jQuery适配器出现问题,即rails.js,在jQuery之前加载,所以在布局更改后修复了问题:

<%= javascript_include_tag ['rails', 'jquery'] %>

更改为:

<%= javascript_include_tag ['jquery', 'rails'] %>