Ruby-on-rails RAILS 链接到外部站点，url 是用户表的属性，如：@users.website
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RAILS link_to external site, url is attribute of user table, like: @users.website
提问by thedeepfield
I'm working on a website that allows users to create an account. One of the attributes when creating a user is a users personal website. When I try to use the users website like this:
我正在开发一个允许用户创建帐户的网站。创建用户时的属性之一是用户个人网站。当我尝试像这样使用用户网站时：
<%= link_to @user.site, @user.url %>
The url that gets generated is: http://0.0.0.0:3000/www.userswebsite.com
生成的网址是： http://0.0.0.0:3000/www.userswebsite.com
I think this is because of the @user part of the link_to... but how can I get this to link to www.userwebsite.com ?
我认为这是因为 link_to 的 @user 部分...但是我怎样才能让它链接到 www.userwebsite.com ？
采纳答案by cam
Looks like you need to stick the protocol on your link. E.g. you have www.userswebsite.com in your database, it should be http://www.userswebsite.com
看起来您需要在链接上粘贴协议。例如，您的数据库中有 www.userswebsite.com，它应该是http://www.userswebsite.com
回答by Voldy
You can prepend url with protocol if it's absent:
如果不存在，您可以在 url 前面加上协议：
module UrlHelper
def url_with_protocol(url)
/^http/i.match(url) ? url : "http://#{url}"
end
end
And then:
进而：
link_to @user.site, url_with_protocol(@user.url), :target => '_blank'
回答by Anshul Garg
回答by Abram
Try out the awesome gem Domainatrix:
试试很棒的 gem Domainatrix：
Then you can simply parse the URL on the fly with:
然后你可以简单地动态解析 URL：
<%= Domainatrix.parse(@user.url).url %>
Better yet, create a before_saveaction in your user model that parses the url before saving it.
更好的是，before_save在您的用户模型中创建一个操作，在保存之前解析 url。
before_save :parse_url
def parse_url
if self.url
self.url = Domainatrix.parse(self.url).url
end
end
Here are some samples of what you can do with Domainatrix:
以下是您可以使用 Domainatrix 执行的一些示例：
url = Domainatrix.parse("http://www.pauldix.net")
url.url # => "http://www.pauldix.net" (the original url)
url.public_suffix # => "net"
url.domain # => "pauldix"
url.canonical # => "net.pauldix"
url = Domainatrix.parse("http://foo.bar.pauldix.co.uk/asdf.html?q=arg")
url.public_suffix # => "co.uk"
url.domain # => "pauldix"
url.subdomain # => "foo.bar"
url.path # => "/asdf.html?q=arg"
url.canonical # => "uk.co.pauldix.bar.foo/asdf.html?q=arg"
