rails/rails — Issue #4083: named_url and url_for: subdomain in Rails 3.1.x
Author: mhuggins
Created: 2011-12-20 23:11:24+00:00
State: open

It looks like issue #2025 was completed, but was not included in Rails 3.1.x. It seems like something that should be. Unfortunately, no one is officially responding to the comments on that issue to state whether or not it will be considered for inclusion.