[PATCH] Defaults support for the new Router DSL

There is not way to be able to set default values for the params hash in Rails 3.0

In Rails 2.x I had something like this

  map.with_options :controller => 'pages', :action => 'show' do |info|
    info.home_page '/', :id => 'about'
    [ 'services', 'support', 'podcasts', 'partners', 'disclaimer', 'privacy', 'design', 'public' ].each do |page|
      info.__send__ "#{page}_page", "/#{page}", :id => page
    end
  end

As you can see, I'm supplying a default value for the :id in the params hash. (Yes, I know it's pretty ugly given it's use of send, but it work nicely)

In Rails 3.0 there is no way I can do this.

I can do something like:

  [ 'services', 'support', 'podcasts', 'partners', 'disclaimer', 'privacy', 'design', 'public' ].each do |page|
    match page => 'pages#show', :as => "#{page}_page"
  end

Which sets up named routes that I can use, but there is no way the :id param can be passed into the controller

or I can do something like:

  match ":id" => 'pages#show', :constraints => { :id => /services|support|podcasts|partners|disclaimer|privacy|design|public/ }

This allows me to pass :id properly via the constraints option, but doesn't allow me to create friendly named routes.

It seems I can have one or the other, but not both.

Would it not be possible to do something like:

  [ 'services', 'support', 'podcasts', 'partners', 'disclaimer', 'privacy', 'design', 'public' ].each do |page|
    match page => 'pages#show', :as => "#{page}_page", :defaults => { :id => page }
  end

I see internally there is still support for defaults as the :to => 'controller#action' notation is translated internally by ActionDispatch::Routing::Mapper::Mapping#defaults