如何在 Rails 之外的 ruby​​ 脚本中使用 ActiveRecord？

我有一个小的 ruby​​ 脚本，我想在其中使用 ActiveRecord 轻松访问数据库模型。最好的方法是什么？

require 'active_record'

# Change the following to reflect your database settings
ActiveRecord::Base.establish_connection(
  adapter:  'mysql2', # or 'postgresql' or 'sqlite3' or 'oracle_enhanced'
  host:     'localhost',
  database: 'your_database',
  username: 'your_username',
  password: 'your_password'
)

# Define your classes based on the database, as always
class SomeClass < ActiveRecord::Base
  #blah, blah, blah
end

# Now do stuff with it
puts SomeClass.find :all
some_class = SomeClass.new