什么`：location => ...`和`head：ok`意思是在'respond_to'格式声明中？ [英] What does `:location => ...` and `head :ok` mean in the 'respond_to' format statement?

问题描述

我正在使用Ruby on Rails 3，我想知道：location => ... 和 head：ok 语句在下面的代码中有意义，它们是如何工作的以及如何使用这些语句。

  respond_to do | format | 
 format.xml {render：xml => @user，：status => ：created，：location => @user} 
结束
 
 respond_to do | format | 
 format.xml {head：ok} 
 end 
  

解决方案

1. render ...：location => @user 会设置 HTTP位置标题来通知客户新创建的资源的位置（即其URL）

2. head：ok sets render 返回一个空的响应（所以只是标题，没有正文），状态200. head：ok 是的缩写：true，status：：ok 。
   
   以下列出了所有可用于设置适当状态码的：status 选项。

I am using Ruby on Rails 3 and I would like to know what the :location => ... and head :ok statements mean in following code, how they work and how I can\should use those.

respond_to do |format|
    format.xml  { render :xml => @user, :status => :created, :location => @user }
end

respond_to do |format|
    format.xml  { head :ok }
end

解决方案

1. render ... :location => @user will set the HTTP location header to inform the client of the location of the newly created resource (that is, its URL)

2. head :ok sets render to return an empty response (so just the header, no body) with status 200. head :ok is shorthand for render nothing: true, status: :ok.
   Here's a list of all the :status options you can use for setting the appropriate status code.

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