SerialTranslator

Translate ActiveRecord object attributes without the use of additional models.

Installation

Add it to your Gemfile:

gem 'serial_translator'

Usage

Add a *_translations column to your table, e.g. title_translations.

class AddTitleTranslationsToBlogPosts < ActiveRecord::Migration
  def change
    add_column :blog_posts, :title_translations, :text
  end
end

In your model, call #serial_translator_for.

class BlogPost < ActiveRecord::Base
  serial_translator_for :title
  # [...]
end

Now you can read and write title_translations or title_#{locale} or title(locale).

blog_post = BlogPost.new
blog_post.title_translations = { de: 'Hallo Welt', en: 'Hello world' }
blog_post.title_en # => "Hello world"
blog_post.title(:en) # => "Hello world"
blog_post.translated_locales # => [:de, :en]

Setting or getting the field name without specifying a locale defaults to the current locale.

I18n.locale = :de
blog_post.title # => "Hallo Welt"
blog_post.title = 'Hey'
blog_post.title_translations # => { de: 'Hey', en: 'Hello world' }

So if you add a title field to a BlogPost form it will work on the title in the user’s locale by default. You can override this by setting the record’s #current_translation_locale.

Add length or presence validations if you want. They will use the same localization keys for error messages as the standard length and presence validations.

class BlogPost < ActiveRecord::Base
  validates :title, serial_translator_presence: true
  validates :text,  serial_translator_length: { minimum: 100 }
end

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request