在Rails应用程序中，如何获取路径的路线？

Question

Given a method and path, I want to ask Rails how that request would be routed, and i want to be able to do this from console, and/or from a rake task. I figure this should be straightforward - ActionDispatch does this for every request, and the route testing methods obviously also do it.

(Currently: Rails 3.0.x, but for the gem I'm writing I will need to be able to do this in Rails 3.0 through 4.1, at minimum, and possibly in older versions as well.)

I've been trying a few things like this:

routes = ActionDispatch::Routing::RouteSet.new
routes.recognize_path('/my/path/23/edit')

or

Rails.application.routes.recognize_path('/my/path/23/edit')

In both cases, I get back "RuntimeError: route set not finalized".

I'm diving through the ActionDispatch code working it out slowly, but if anyone knows the answer off the top of their head it would save me considerable time. So, thank you!

Answer 1

The canonical answer is actually as given in my question:

# GET request
Rails.application.routes.recognize_path('/some/path/63') 

# POST request
Rails.application.routes.recognize_path('/some/path', {:method => :post })

It looks like that wasn't working because I'd previously tried initializing RouteSet manually, which had interfered with the environment's ability to properly load the routes. When I restarted the console session, the above commands worked fine.