Problem

When the constraints block is active, I get RoutingError: No route matches "/" when going to localhost:3000. If I comment the block out, it works just fine. But I need both:

http://example.com should render PagesController#show with params[:permalink] being 'index'
http://clemensk.example.com should render ProfilesController#show

Hints anyone?

Thanks!

routes.rb

constraints(Subdomain) do
  match '/', :to => 'profiles#show', :as => :profile # works!
end

match '/', :to => 'pages#show', :permalink => 'index' # shortcut root :to => 'pages#show' – either doesn't work

subdomain.rb

# from railscasts.com
class Subdomain
  def self.matches?(request)
    i = Rails.env.development? ? 0 : 1 # so I can use localhost:3000
    request.subdomain(i).present? && request.subdomain(i) != "www"
  end
end

What's weird to is that it does work in Ryan's code – I've tested it repeatedly and also used the current Rails gem (Ryan's code uses 3.0.0.beta4 by default).

Commenting out other routes doesn't work either – so no conflict there.

Okay, it's related to the routing filter plugin. :(

I just ran into this same problem. Did you ever figure out how to make routing-filter respect constraints?

I've put the problem on hold because I had other things to do. I'll probably send a patch if the problem really is in routing filter or post an alternative solution.