Using ActiveRecord in jRuby

app.rb

require 'yaml'
require 'active_record'
require 'models'

database_configs = YAML.load(File.read "database.yml")
ActiveRecord::Base.establish_connection(
  :adapter=> database_configs["adapter"],
  :host => database_configs["host"],
  :database=> database_configs["database"],
  :username => database_configs["user"],
  :password => database_configs["password"]
)


class Page < ActiveRecord::Base
end

puts Page.first

database.yml

host: 127.0.0.1
adapter: jdbcmysql
user: root
password:
port:
database: development

Gemfile

source "https://rubygems.org"

gem 'activerecord', '~> 3.2.14'
gem 'activerecord-jdbcmysql-adapter', :platform => :jruby