Rails - Nov 2007 - REST-based controller using HEAD to test for exist?/status?

I''d like to add an API to my REST-based controller that indicates the  
existence of a resource (and maybe other status like the last time it  
was updated.)

If I understand REST correctly, this seems like a natural use of  
http''s HEAD method. I should be able to just add route for :conditions
=> {:method => :head} param, and implement a status or exist? method  
to my controller.

Why isn''t this generated when I create my scaffold-resource?

How do others solve this problem? Do you just test for head? in your  
show method?

I''m curious to know the best practice.

Thanks,

Drew

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