问题
So we've got a legacy system that tracks places with IDs like "Europe/France/Paris", and I'm building a Rails facade to turn this into URLs like http:// foobar/places/Europe/France/Paris. This requirement is not negotiable, the number of possible levels in unlimited, and we can't escape the slashes.
Setting up routes.rb for http://foobar/places/Europe is trivial:
map.resources :places
...but http:// foobar/places/Europe/France complains "No action responded to Europe". I tried:
map.connect '/places/:id', :controller => 'places', :action => 'show'
...but this gives the same result, as apparently the :id ends at the first '/'. How do I make the ID cover anything and everything after the "places"?
回答1:
Have a look at the Routing Guide for full documentation:
http://guides.rubyonrails.org/routing.html
Specifically section "4.9 Route Globbing".
But I think what you really want to do is declare your route like:
map.connect '/places/*id', :controller => 'places', :action => 'index'
Called with a URL like
/places/foo/bar/1
Yields a params[:id] => ["foo", "bar", "1"]
Which you could easily (re)join with "/" to yield the full string you want "foo/bar/1" (you will probably have to re-insert the leading slash manually.
That should get you going.
回答2:
I tweaked Cody's answer above slightly to come up with this:
map.place '/places/*id', :controller => 'places', :action => 'show'
map.connect '/places/*id.:format', :controller => 'places', :action => 'show'
By using map.place instead of map.connect, Rails knows what resource we're dealing with and generated place_url, place_path etc helpers correctly.
Now, the 2nd line should work but doesn't thanks to the bug above, so here's a workaround for places_controller.rb that manually splits the ID and sets the format, defaulting to XML:
id, suffix = params[:id].join('/').split('.')
params[:format] = suffix ? suffix : "xml"
来源：https://stackoverflow.com/questions/1837794/ruby-on-rails-routing-for-a-tree-hierarchy-of-places