There's a lot of open issues
A long-lived project that still receives updates
Semi-automatic maintenance of most translations in a Rails app.
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AwesomeTranslations

Install

gem 'awesome_translations'
gem 'sqlite3', group: :development

AT uses SQLite3 for creating a database containing a farily large cache.

Then run the following:

bundle exec rake awesome_translations:install

Insert this into your "routes.rb" file:

mount AwesomeTranslations::Engine => "/awesome_translations" if Rails.env.development?

Translations under controllers and models

If you want to do translations from your models or controllers, you will need to add this to a new initializer file under "config/initializers/awesome_translations.rb"

AwesomeTranslations.load_object_extensions

If you don't like monkey patching the Object-class, you can also include it into ApplicationRecord' by inserting something like this to allow t-method-calls from inside models:

class ApplicationRecord < ActiveRecord::Base
  include AwesomeTranslations::TranslateFunctionality
end

You will also need to modify the line in your Gemfile a bit:

gem 'awesome_translations'

Helper translations

The t-method translates like from inside a view in Rails. To get around this, you can call 'helper_t' instead. Start by including that method in your helpers by adding this to ApplicationHelper:

module ApplicationHelper
  include AwesomeTranslations::ViewsHelper
end

Controller translations without action in key

Start by including this in your ApplicationController:

class ApplicationController
  include AwesomeTranslations::ControllerTranslateFunctionality

Then you can use the controller_t-method like this:

class UsersController < ApplicationController
  def create
    flash[:notice] = controller_t('.user_was_saved')
  end
end

This is an example of how it works and what the difference is:

module ApplicationHelper
  include AwesomeTranslations::ApplicationHelper

  # Sample method with translation
  def hello_world
    t('.hello_world') #=> translates with key '#{controller_name}.#{action_name}.hello_world'
    return helper_t('.hello_world') #=> translates with key 'helpers.application_helper.hello_world'
  end
end

Translating your application

Start a Rails server for your project and go to the namespace called something like "http://localhost:3000/awesome_translations". Start translating your app through the webinterface.

License

This project rocks and uses MIT-LICENSE.