file_organizer.rb

class FileOrganizer

  def initialize(root, home, debug=false)
    @root  = root
    @home  = home
    @debug = debug
  end

  def organize_by_class_lineage(klass, current_path, lineage=[])
    case klass.parent
    when @root
      mkdir_p  File.join(@home, *lineage[0..-2])
      mv       File.join(@home, *(lineage + File.basename(current_path)))
    else
      organize_by_class_lineage(klass.parent, current_path, lineage.unshift(klass.to_s.underscore))
    end
  end
  
  protected
  
  def mkdir_p(path)
    @debug ? puts(" --> mkdir -p #{path}") : `mkdir -p #{path}`
  end
  
  def mv(a,b)
    @debug ? puts(" --> mv #{a} #{b}") : `mv #{a} #{b}`
  end
  
end

organizer = FileOrganizer.new(ActiveRecord::Base, "#{Rails.root}/app/models", true)

for path in Dir["#{Rails.root}/app/models/**/*"]
  next unless File.basename(path) =~ /(.*).rb$/
  begin    
    puts "Doing: #{model = $1.camelcase.constantize}"
    organizer.organize_by_class_lineage(model, path) 
  rescue LoadError => e
    puts "LOAD ERROR: #{path}"
  end
end