rails - DRY response_to 重复动作 [英] rails - DRY respond_to with repeated actions

问题描述

在我的一个 rails 控制器中，我必须响应几种类型的格式，所以我使用典型的 respond_to 链:

In one of my rails controller, I must respond to several types of formats, so I use the typical respond_to chain:

respond_to do |format|
  format.html   { ... }
  format.mobile { ... }
  format.jpg  { ... }
  format.xml  { ... }
  format.js   { ... }
end

通常 { ... } 部分在几种格式中重复.在这种情况下保持干燥的最佳方法是什么?在 html、mobile 和 xml 具有重复"操作的情况下，我想做这样的事情:

Usually that the { ... } part is repeated on several formats. What is the best way to stay DRY on this case? On an scenario in which html, mobile and xml have a "repeated" action, I'd like to do something like this:

respond_to do |format|
  format[:html, :mobile, :xml] { ... }
  format.jpg  { ... }
  format.js   { ... }
end

非常感谢.

推荐答案

你试过 format.any(:html, :mobile, :xml) 吗?

Have you tried format.any(:html, :mobile, :xml)?

示例(2011/9/14 添加)

来自 rails 文档

Respond to 还允许您使用 any 为不同的格式指定一个公共块:

Respond to also allows you to specify a common block for different formats by using any:

def index
  @people = Person.all

  respond_to do |format|
    format.html
    format.any(:xml, :json) { render request.format.to_sym => @people }
  end
end

在上面的例子中，如果格式是xml，则渲染:

In the example above, if the format is xml, it will render:

render :xml => @people

或者如果格式是json:

Or if the format is json:

render :json => @people

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