#138 I18n (revised)

Mar 29, 2012 | 10 minutes | Views

Translate a site into other languages through internationalization (I18n). Here I show how to store a locale in the URL and manage translated text through YAML files.

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Update 4/12/12: Unfortunately the routing code used in this episode will result in an infinite redirect on pages which do not exist. Please use the routing code below to fix this problem (note the constraints: option).

          products/index.html.erb
        
<h1><%= t ".title" %></h1>
<em><%= t ".description" %></em>
...
<%= Product.human_attribute_name(:price) %>

          layouts/application.html.erb
        
Language:
<%= link_to_unless_current "English", locale: "en" %> |
<%= link_to_unless_current "Wookieespeak", locale: "wk" %>

          application_controller.rb
        
before_filter :set_locale

private

def set_locale
  I18n.locale = params[:locale] if params[:locale].present?
  # current_user.locale
  # request.subdomain
  # request.env["HTTP_ACCEPT_LANGUAGE"]
  # request.remote_ip
end

def default_url_options(options = {})
  {locale: I18n.locale}
end

          config/routes.rb
        
scope ":locale", locale: /#{I18n.available_locales.join("|")}/ do
  resources :products
  root to: 'products#index'
end
match '*path', to: redirect("/#{I18n.default_locale}/%{path}"), constraints: lambda { |req| !req.path.starts_with? "/#{I18n.default_locale}/" }
match '', to: redirect("/#{I18n.default_locale}")

          config/locals/en.yml
        
en:
  products:
    index:
      title: "Browse Products"
      description: "Thank you for visiting our store. Now take out your wallet and buy something."

          config/locals/wk.yml
        
wk:
  products:
    index:
      title: "Wyaaaaaa Ruh"
      description: "Huwaa muaa mumwa. Wua ga ma uma ahuma ooma."
  activerecord:
    attributes:
      product:
        price: "Aurhaa"