asciinema.org/db/migrate/20120114195316_change_asciicast_duration_to_float.rb

class ChangeAsciicastDurationToFloat < ActiveRecord::Migration
  def up
    change_column :asciicasts, :duration, :float, :null => false
  end

  def down
    change_column :asciicasts, :duration, :integer, :null => false
  end
end