确定Rails服务器URI

我通过在运行Mongrel的脚本中设置一个带有应用程序URL的环境变量来解决这个问题。环境。var.对Ruby是可用的,您甚至可以在/config/environment.rb中设置一个类似RAILS\u ROOT的全局变量

http://perma-link.appspot.com/k

request.domain
request.port

class Bar < AR::Base 
  def self.active_for_domain(domain)
    find(:all, :conditions => ["deleted <> true and domain = ?", domain])
  end
end

class FooController < ApplicationController
  def index
    @bars = Bar.active_for_domain(request.domain)
  end
end

我想你在找 root_url .