Using multilang-hstore in Rails 4

add_multilang_hstore_gem_to_gemfile.sh

# add the gem to your Gemfile

 gem 'multilang-hstore', '~> 1.0.0'

# execute bundle install

enable_hstore_postgresql.sh

# enable hstore extension in the development database of our project

$ psql -d demomultilang_development -c "CREATE EXTENSION IF NOT EXISTS hstore"

new_hstore_based_model.sh

# new model with hstore attribute, we will enable translation for the hstore field.

$ rails g model Post title:hstore
$ rake db:migrate

play_with_multilang.rb

I18n.available_locales #=> [:en. :es]

Post.create(title_en: "In English", title_es: "En Español")
#<Post id: 1, title: {"en"=>"In English", "es"=>"En Español"}, created_at: "...", updated_at: "...">

I18n.locale = :en
# => :en
Post.last.title
# => "In English"

I18n.locale = :es
Post.last.title
# => "En Español"

# have fun! => https://github.com/heapsource/multilang-hstore

tweak_hstore_model_to_add_multilang.rb

class Post < ActiveRecord::Base
  multilang :title # enables multilang on top of our new hstore field
end