When using a static subdomain constraint, it would make sense to implicitly set the subdomain as a default. As it is right now, that has to happen explicitly:

  constraints subdomain: "admin", defaults: { subdomain: "admin" } do
    draw :admin
  end

But since the routes inside the constraint block are inaccessible to other subdomains, having to define the default here feels redundant. This would be more elegant:

  constraints subdomain: "admin" do
    draw :admin
  end

Thoughts?