derive_class_name

# File activerecord/lib/active_record/reflection.rb, line 217
        def derive_class_name
          # get the class_name of the belongs_to association of the through reflection
          if through_reflection
            options[:source_type] || source_reflection.class_name
          else
            class_name = name.to_s.camelize
            class_name = class_name.singularize if [ :has_many, :has_and_belongs_to_many ].include?(macro)
            class_name
          end
        end