Active Record example without Rails

ar_example.rb

require 'active_record'

ActiveRecord::Base.establish_connection(
  :adapter  => 'sqlite3',
  :database => 'database')

ActiveRecord::Base.connection.execute <<-SQL
  CREATE TABLE IF NOT EXISTS users (
    id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    name VARCHAR
  );
SQL

class User < ActiveRecord::Base

end

u = User.new
u.name = 'blah'
u.save

puts User.first.name