如何使用子域约束将此根路径移植到Rails 4？

Question

我们有一个应用程序，从Rails 3.2升级到4.0。

3.2版本的roots在整个routes.rb上都有，我将其移植到新的语法中，但我不太清楚如何处理子域约束。

在3.2中：

  constraints(SubDomain) do
    root to: "companies#index"
    ...
  end

我试图像其他根路径一样移植它，但是看起来在无约束的根路径上存在冲突。

以下是我尝试过的：

  constraints(SubDomain) do
    get "/", to: "companies#index", as: :root
    ...
  end

而错误是：

/Users/blu/.rvm/gems/ruby-2.1.7/gems/actionpack-4.0.13/lib/action_dispatch/routing/route_set.rb:430:in add_route': Invalid route name, already in use: 'root' (ArgumentError) You may have defined two routes with the same name using the:asoption, or you may be overriding a route already defined by a resource with the same naming. For the latter, you can restrict the routes created withresourcesas explained here: http://guides.rubyonrails.org/routing.html#restricting-the-routes-created from /Users/blu/.rvm/gems/ruby-2.1.7/gems/actionpack-4.0.13/lib/action_dispatch/routing/mapper.rb:1484:in add_route‘

任何正确的语法帮助在这里将是很好的，谢谢。

Answer 1

通过给出不同的名称来解决冲突

constraints(SubDomain) do
  root :to => "companies#index", :as=> :subdomain_root
   ...
end