Well the YAML method works with one oddity.  If I don't also have a where 
clause on the last table I get an error undefined method `name' for 
nil:NilClass.

Say for example if I have the following YAML

buildings:
   floors:
      spaces:
         locations:
            location_materials: material

It converts to the following Hash
{"buildings"=>{"floors"=>{"spaces"=>{"locations"=>{"location_materials"=>"material"}}}}}

Which only works if I also include a .where("materials.name like '%'") 
without the where clause I get the above error.

Bob

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