Rails - Apr 2008 - Nested resource without an explicit has_many relationship

I''m interested in showing the usages for a particular project, yet
there is no direct relationship between project and usages.

Project has_many :requests
Request has_many :options
Options belongs_to :asset
Asset has_many :usages

My thinking is I should add a "usages and usages=" method to my
project model.  Then I can define the following route.

map.resources :projects, :has_many => [:requests, :usages]

Does this approach make any sense?  Any other suggestions?

TIA,

Sean


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I settled on has_many with the :finder_sql option.  This seems to work
well enough but I''m curious to hear if anyone has a better idea.
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