1234567890_example_migration.rb

# this is an example migration template for you to tweak
# it is assumed that this file will be located in script/migrations
require File.expand_path('../../../config/environment', __FILE__)

class ExampleMigration < Migrations::KatamaMigration

  # you can use DateTime.now.to_i
  @@db_version = 1234567890

  def up
    puts "in #{self.class}#up"
  end

  # this will be executed if run with the --rollback flag
  def down
    puts "in #{self.class}#down"
  end
end

if $0 == __FILE__
  ExampleMigration.new.run
end