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Lucky for you, we??™re going to get you started on that task.
The following script assumes that you will be storing your database configuration details
in a YAML file called database.yml. For simplicity, the following script, the YAML file, and your
migrations are assumed to all be located in the same directory.
require 'rubygems'
require_gem 'activerecord'
if ARGV[0] =~ /VERSION=\d+/
version = ARGV[0].split('=')[1].to_i
else
version = nil
end
@logger = Logger.new $stderr
ActiveRecord::Base.logger = @logger
ActiveRecord::Base.colorize_logging = false
@config = YAML.load_file(File.join(File.dirname(__FILE__), 'database.yml'))
ActiveRecord::Base.establish_connection(@config["development"])
ActiveRecord::Migrator.migrate("", version)
Assuming you place the preceding script in a file called migrate.rb, you can run your
sequentially numbered migrations with the command ruby migrate.rb.
?– Note This script does not generate the migration files. You??™ll still need to create and populate the files by
hand (or write another script to generate them).


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