ruby-on-rails - 在 rails 3 中为 ajax 和 html 请求呈现不同的 Action

Question

在 rails 3 中，我有以下代码用于我在照片 Controller 中的销毁操作

 def destroy
      @photo = Photo.find(params[:id])
     if @photo.destroy
       flash[:notice] = t('photo.deleted')
       respond_to do |format|
         if request.xhr?
           format.js
         else
           format.html {redirect_to photos_path}
         end
       end
     else
       flash[:alert] = t('.photo.error_deleting')
       if request.xhr?
         redirect_to(photos_url)
       else
         redirect_to(photo_path @photo)
       end
     end
   end

目标本质上是重定向到索引页面(如果从标准链接调用)，如果从远程链接调用则渲染 destroy.js。
这有效，但我想知道在 rails 3 中是否有更简洁的方法来执行此操作。可能使用 response_with 运算符？

谢谢

Answer 1

这应该适合你:

respond_to :html, :js

def destroy
  @photo = Photo.find(params[:id])
  if @photo.destroy
    flash[:notice] = t('photo.deleted')
  else
    flash[:alert] = t('.photo.error_deleting')
  end

  respond_with(@photo)
end

这里有一篇很好的博客文章:
http://ryandaigle.com/articles/2009/8/10/what-s-new-in-edge-rails-default-restful-rendering

以下是有关逻辑的帖子的引用:

If the :html format was requested:

• If it was a GET request, invoke render (which will display the view template for the current action)
• If it was a POST request and the resource has validation errors, render :new (so the user can fix their errors)
• If it was a PUT request and the resource has validation errors, render :edit (so the user can fix their errors)
• Else, redirect to the resource location (i.e. user_url)

If another format was requested, (i.e. :xml or :json)

• If it was a GET request, invoke the :to_format method on the resource and send that back
• If the resource has validation errors, send back the errors in the requested format with the :unprocessable_entity status code
• If it was a POST request, invoke the :to_format method on the resource and send that back with the :created status and the :location of the new created resource
• Else, send back the :ok response with no body

更多关于 to_format部分来自 documentation :

First we try to render a template, if the template is not available, we verify if the resource responds to :to_format and display it.

还有一个关于它的 Railscast:
http://railscasts.com/episodes/224-controllers-in-rails-3