Rails - Jul 2006 - How do I make controller hierachies? Inherit or route them?

I would like a controller hierarchy with urls that look like...

/admin/documents

where /admin is handled by the admin_controller and documents by the 
document_controller.  I like the controller inheritance technique 
discussed on the web[1], but I get a template not found error message. 
I also have to define the route in the routes.rb file, which, according 
to the author, is not supposed to be necessary.

I like the inheritance technique because it lets me put common methods 
in one place.  On the other hand, maybe it doesn''t have to be so 
complicated.  I can''t find much information on best practices.  Any 
advice would be much appreciated.

Jose

[1] http://justinfrench.com/index.php?id=122

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