def underscoreize( str )
      str.to_s.downcase.tr(Constants::HYPHEN, Constants::UNDERSCORE)
    end
def underscoreize( str )
      str.to_s.downcase.tr(Constants::HYPHEN, Constants::UNDERSCORE)
    end
Swaps out all hyphens (-) for underscores (_) good for stringing to symbols
 a field name.

 Example:

  string = :resent_from_field
  underscoreize ( string ) #=> 'resent_from_field'