Rails 3-限制资源路由中操作的格式 [英] Rails 3 - Restricting formats for action in resource routes

问题描述

我在路线中定义了一个资源。

I have a resource defined in my routes.

resources :categories

我的类别控制器中包含以下内容：

And I have the following in my Category controller:

  def show
    @category = Category.find(params[:id])

    respond_to do |format|
      format.json { render :json => @category }
      format.xml  { render :xml => @category }
    end
  end

对于json和xml。但是我不希望控制器响应html格式的请求。如何只允许json和xml？

The controller action works fine for json and xml. However I do NOT want the controller to respond to html format requests. How can I only allow json and xml? This should only happen in the show action.

实现此目标的最佳方法是什么？
还有烘干Dry响应块的好技巧吗？

What is the best way to achieve this? Also is there any good tips for DRYing up the respond_to block?

感谢您的帮助。

推荐答案

我发现这似乎可行（感谢@Pan向正确的方向指出我）：

I found that this seemed to work (thanks to @Pan for pointing me in the right direction):

resources :categories, :except => [:show]
resources :categories, :only => [:show], :defaults => { :format => 'json' }

以上似乎迫使路由器向无格式请求提供服务显示动作，默认情况下为json。

The above seems to force the router into serving a format-less request, to the show action, as json by default.

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