Creating a Rails 4.1 app using JRuby

Notes around creating a Rails 4.1.8 application on JRuby 1.7.16.1.

Creating application

Using RVM to manage my rubies.

rvm use jruby-1.7.16.1
gem install rails
rails new .

Configuring Rails app for PostgreSQL and JDBC

Add the following to the Gemfile.

gem 'activerecord-jdbcpostgresql-adapter'

Also add the following towards the top of the Gemfile.

ruby '1.9.3', :engine => 'jruby', :engine_version => '1.7.16.1'

My Gemfile as it currently stands:

source 'https://rubygems.org'

ruby '1.9.3', :engine => 'jruby', :engine_version => '1.7.16.1'

gem 'rails', '4.1.8'
gem 'activerecord-jdbcpostgresql-adapter'
gem 'sass-rails', '~> 4.0.3'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'therubyrhino'
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 2.0'
gem 'sdoc', '~> 0.4.0', group: :doc
gem 'puma'

Configuring database.yml

Set up your databases environments, similar to what I have here:

default: &default
  adapter: jdbcpostgresql
  encoding: unicode

development:
  <<: *default
  host: localhost
  database: foobar_development
  username: postgres
  password: postgres

test:
  <<: *default
  host: localhost
  database: foobar_test
  username: postgres
  password: postgres

production:
  <<: *default
  host: localhost
  database: foobar_production
  username: postgres
  password: postgres