Rails 3 - 使用jquery ajax调用partial的link_to

I am trying to get a link_to to display a partial via jquery ajax, but can't seem to get it to work (edit: returning blank screen) and I'm not sure what I'm missing. Any help would be appreciated.

我试图得到一个link_to来显示部分通过jquery ajax，但似乎无法让它工作（编辑：返回空白屏幕），我不知道我错过了什么。任何帮助，将不胜感激。

I would like to click the link "Preview Widget" and have it display _widget.html.erb in the div preview.

我想点击“预览窗口小部件”链接，让它在div预览中显示_widget.html.erb。

From my understanding the link "Preview Widget" should call the action def preview_widget which calls preview_widget.js.erb which then renders the partial _widget.html.erb in the div.

根据我的理解，链接“预览小部件”应该调用动作def preview_widget，它调用preview_widget.js.erb然后在div中呈现部分_widget.html.erb。

EDIT: updates link as per Ignatius Reza suggestions

编辑：根据Ignatius Reza的建议更新链接

show.html.erb

show.html.erb

<%= link_to "Preview Widget", :action => 'preview_widget' , :id => @widget.id, :remote => true %> %>
<div id="preview"></div>

widget_controller.rb

widget_controller.rb

def preview_widget  
    respond_to do | format |  
        format.js {render :layout => false}  
    end
end

preview_widget.js.erb

preview_widget.js.erb

$( "#preview" ).html( "<%= escape_javascript( render( :partial => "widget", :locals => { :widget => @widget} ) ) %>" );

_widget.html.erb

_widget.html.erb

<% @widget.videos.each do |video| %>
      <h3><a href='#'><%= video.name %></a></h3>
      <div>
        <object height='316' width='540'>
          <embed  style='border: 1px solid #333333;' height='316' width='540' allowfullscreen='true' allowscriptaccess='always' type='application/x-shockwave-flash' src='<%= video.url %>'>
        </object>
      </div>
  <% end %>

routes.rb

的routes.rb

match 'preview_widget' => 'widgets#preview_widget'

3 个解决方案

#1

Ok finally got this to work with the following changes.
routes.rb (added member to widget resources)

好的，最后得到了以下更改。 routes.rb（添加成员到窗口小部件资源）

  resources :widgets do
    member do
      get 'preview_widget'
    end
  end

show.html.erb (changed link_to to match routes)

show.html.erb（更改了link_to以匹配路由）

<%= link_to 'Preview', preview_widget_widget_path(:id => @widget.id),  :remote => true %>

This now shows the partial. I am still not 100% sure what was wrong with the previous code - at least it now works.

现在显示部分。我仍然不能100％确定以前的代码有什么问题 - 至少它现在有效。

#2

It's not cleared on your question, what you "can't seem to get it to work".. but from what i see in the code you gave.. all seems right, but you miss the actual ajax call..

在你的问题上没有清除，你“似乎无法让它工作”......但是从我给你的代码中看到的......一切似乎都是对的，但是你错过了真正的ajax调用..

it could be added by adding :remote => true to the "Preview Widget" link such as :

它可以通过添加：remote => true添加到“预览窗口小部件”链接，例如：

<%= link_to "Preview Widget", :action => 'preview_widget' , :id => @widget, :remote => true %>

if the default behaviour is enough.. or you could add your own custom ajax call on application.js..

如果默认行为足够..或者您可以在application.js上添加自己的自定义ajax调用..

as a note, i don't think setting the :id attribute of "Preview Widget" link to @widget is wise.. as it will put the string representation of widget, which usually will looks like "<Widget:0x12412 ..>" perhaps it would be better to change it to "widget-link-#{@widget.id}"

作为一个注释，我不认为设置“预览窗口小部件”链接到@widget的：id属性是明智的..因为它将放置窗口小部件的字符串表示，通常看起来像“ “也许最好把它改成”widget-link-#{@widget.id}“ ：0x12412>

#3

I’ve a similar problem that brought me to this threat, so I thought sharing my solution here might be helpful to anybody.

我有一个类似的问题让我受到这种威胁，所以我认为在这里分享我的解决方案可能对任何人都有帮助。

With :remote => true I got an normal HTTP Request to http://localhost:3000/info/about?remote=true instead of the wanted AJAX Request to http://localhost:3000/info/about

使用：remote => true我得到一个正常的HTTP请求到http：// localhost：3000 / info / about？remote = true而不是想要的AJAX请求到http：// localhost：3000 / info / about

The fix was easy but hard to find!

修复很容易，但很难找到！

In my HAML View:

在我的HAML视图中：

WRONG Code that triggers HTTP Request

错误触发HTTP请求的代码

= link_to( image_tag("icons/information.png", :title => t('menu.info')), :controller => "info", :action => "about", :remote => true )

OK-Code that triggers AJAX Request

OK-Code触发AJAX请求

= link_to( image_tag("icons/information.png", :title => t('menu.info')), {:controller => "info", :action => "about"}, :remote => true )

The only difference is {curly brackets}!

唯一的区别是{花括号}！

Funny though is that with the AJAX Request I get info/about.html rendered, without the layout file. Which isn’t a partial but is close to what Jan wanted. I was expecting info/about.js.erb to be rendered.

有趣的是，使用AJAX请求我得到info / about.html呈现，没有布局文件。这不是偏袒的，但接近于Jan想要的。我期待渲染info / about.js.erb。

In InfoController

在InfoController中

  def about
    respond_to do |format|
      format.html # renders ‘views/info/about.html.erb’ inside layout template on HTTP Request
      format.js# renders ‘views/info/about.html.erb’, without layout
    end
  end

  def about
    respond_to do |format|
      format.html # => ‘views/info/about.html.erb’ inside layout template on HTTP Request
      format.js {render 'about.js'} # => renders ‘views/info/about.js.erb’
    end
  end

#1