模型中Rails应用程序的基本URL [英] Base URL of Rails app in Model

问题描述

为了能够查看用户是否在Facebook上共享了我的页面，我希望能够创建这种URL:

In order to be able to see if a User has shared my page on Facebook, I want to be able to create this kind of URLs:

http://graph.facebook.com/?id=http://stylehatch.co/some_unique_user_token

其中 http://stylehatch.co 应该是我的基本URL.我正在考虑在用户模型中使用一种方法来构建并返回该URL，但无法从模型中访问root_url.

Where http://stylehatch.co would need to be my base URL. I am thinking on having a method in the User model that will build and return that URL, but I can't access root_url from within my model.

如何从模型获取应用程序的基本URL?

How can I get the base URL of my application from a Model?

如果我的网址看起来像这样:

Say if my urls look like this:

http://myapp.com/users/new

http://myapp.com/users/2/show

如何从模型中获取" http://myapp.com "?我添加了:

How can I get the "http://myapp.com" from my model? I have added:

  include Rails.application.routes.url_helpers

在我的模型中，但似乎root_url为nil.有什么想法吗?这是正确的作为Model方法，还是应该将其放在助手中?

in my model, but it seems that root_url is nil. Any thoughts? Is this correct to be a Model method, or should I place it in a helper?

谢谢

推荐答案

您可以使用环境变量:

ROOT_URL=http://myapp.com

应用内

ENV['ROOT_URL']

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