从rails控制器返回 [英] Returning from rails controller

问题描述

这是一个初学者的铁路问题...

完成后：

  format.xml {head：ok} 
  

显示视图？如果我在这一点下降函数的结束，我得到我期望的，但如果我调用'返回'，我最终在视图（或在我的情况下在一个缺少视图模板）。我可以编写大量的if / else等，但它将是很好的早期的函数，而不会在视图模板中结束。

我搜索过并且不能弄明白这明显的答案是什么;它必须是直接的...

解决方案

你可以使用 render：nothing => true， ：status =>：ok 返回没有渲染任何东西，一旦你发送一个渲染：nothing => true你需要从控制器返回，这样的东西可能工作。您可以交换 head（）方法调用 render => ：nothing 后跟一个 return ， head（） / p>

• api.rubyonrails.org/classes/ActionController/Base.html#M000635

这里的代码为你做它...

• gist.github.com/126367

如果无法正确回答您的问题，对于一些有用的用户评论的render调用可以在这里找到：

• apidock.com/rails/ActionController/Base/render

（对不起，我不能超链接的链接，因为一个新的用户stackoverflow将不允许我发布多个！）

Here's a beginner rails question...

After I do:

format.xml { head: ok}

How do I return from the controller endpoint without showing the view? If I drop off the end of the function at this point, I get what I expect, but if I call 'return', I end up in the view (or in my case in a missing view template). I can code up lots of if/else etc., but it would be nice to early out from the function without ending up in a view template.

I've searched around and can't figure out what the obvious answer is to this; it must be straightforward...

解决方案

You can use "render :nothing => true, :status => :ok" to return without rendering anything, once you have send a render :nothing => true you need to return from the controller, something like this might work. You can swap the head() method call for a render => :nothing followed by a return, the head() method is documented here:

• api.rubyonrails.org/classes/ActionController/Base.html#M000635

Here's the code that should do it for you...

• gist.github.com/126367

Ping me if that doesn't properly answer your question, documentation for the render call with some helpful user comments can be found here:

• apidock.com/rails/ActionController/Base/render

(sorry I couldn't hyperlink the links for you, as a new user stackoverflow won't allow me to post more than one!)

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