osem-fcy/db/migrate/20150929142405_change_postalcode_format_in_venues.rb

class ChangePostalcodeFormatInVenues < ActiveRecord::Migration
  def up
    change_column :venues, :postalcode, :string
  end

  def down
    raise ActiveRecord::IrreversibleMigration.new('Cannot reverse migration.')
  end
end