在Rails3动态表单字段使用jQuery [英] Dynamic form fields in Rails3 with jquery

问题描述

我使用rialscasts＃74为指导。

I am using rialscasts #74 as a guide.

我想动态通过文本链接添加表单域。在railscast情节，他实现了它非常漂亮，使用下面的code：

I am trying to dynamically add form fields via a text-link. In the railscast episode he achieves it very nicely using the following code:

<!-- layouts/application.rhtml -->
<%= javascript_include_tag :defaults %>

<!-- projects/new.rhtml -->
<div id="tasks">
  <%= render :partial => 'task', :collection => @project.tasks %>
</div>
<p><%= add_task_link "Add a task" %></p>

<!-- projects/_task.rhtml -->
<div class="task">
<% fields_for "project[task_attributes][]", task do |task_form| %>
  <p>
    Task: <%= task_form.text_field :name %>
    <%= link_to_function "remove", "$(this).up('.task').remove()" %>
  </p>
<% end %>
</div>

 # projects_helper.rb

 def add_task_link(name)
    link_to_function name do |page|
      page.insert_html :bottom, :tasks, :partial => 'task', :object => Task.new
    end
 end

在projects_help.rb内容是我最感兴趣的是什么，但问题是，他是通过样机这样做。我要寻找一个确切的重复执行使用jQuery（和rails3）。你怎么看？谢谢！

content within projects_help.rb is what I am most interested in. The problem is he is doing this via prototype. I am looking for an exact duplicate implementation using jquery (and rails3). What do you think? Thanks!

推荐答案

雅我要说 - 这是一个非常古老的railscast并同时使用过时的做法和旧的框架。我会尽力帮助你。

ya I was going to say -- that is a very old railscast and is using both outdated practices and an old framework. I'm gonna try to help you out.

布局/ application.erb

layouts/application.erb

<%= javascript_include_tag :defaults %>

项目/ new.erb

projects/new.erb

<div id="tasks">
  <%= render :partial => 'task', :collection => @project.tasks %>
</div>
<p><%= add_task_link "Add a task" %></p>

项目/ _task.erb

projects/_task.erb

<div class="task">
<!-- I think this part should still work -->
<%= fields_for "project[task_attributes][]", task do |task_form| %>
  <p>
    Task: <%= task_form.text_field :name %>
    <!-- We're going to be defining the click behavior with unobtrusive jQuery -->
    <%= link_to "remove", "#", :class => 'remove_task'
  </p>
<% end %>
</div>

projects_helper.rb

projects_helper.rb

def add_task_link(name)
  # This is a trick I picked up... if you don't feel like installing a
  # javascript templating engine, or something like Jammit, but still want
  # to render more than very simple html using JS, you can render a partial
  # into one of the data-attributes on the element.
  #
  # Using Jammit's JST abilities may be worthwhile if it's something you do
  # frequently though.
  link_to name, "#", "data-partial" => h(render(:partial => 'task', :object => Task.new)), :class => 'add_task'
end

公共/ Java脚本/ application.js中

public/javascripts/application.js

$(function(){
  // Binds to the remove task link...
  $('.remove_task').live('click', function(e){
    e.preventDefault();
    $(this).parents('.task').remove();
  });

  // Add task link, note that the content we're appending
  // to the tasks list comes straight out of the data-partial
  // attribute that we defined in the link itself.
  $('.add_task').live('click', function(e){
    e.preventDefault();
    $('#tasks').append($(this).data('partial'));
  });
});

这篇关于在Rails3动态表单字段使用jQuery的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！