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Agile Web Development Using Rails 6

Selecting the Locale

Explore how to configure and select locales in a Rails 6 application to support internationalization. Learn to set default languages, manage locale parameters in URLs, and implement controller callbacks for language selection, enabling your app to handle multiple languages smoothly.

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Configuration for locale

Creating a new configuration file that encapsulates our knowledge of what locales are available and which one is to be used as the default:

Ruby
#---
# Excerpted from "Agile Web Development with Rails 6",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material,
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose.
# Visit http://www.pragmaticprogrammer.com/titles/rails6 for more book information.
#---
#encoding: utf-8
I18n.default_locale = :en
LANGUAGES = [
  ['English',                  'en'],
  ["Español".html_safe, 'es']
]

This code is doing two things.

The first thing it does is use the I18n module to set the default locale. Certainly, I18n is a funny name, but it sure beats typing out “internationalization” all the time. Internationalization, after all, starts with an i, ends with an n, and has eighteen letters in between.

Then the code defines a list of associations between display names and locale names. Unfortunately, all we have available at the moment is a U.S. keyboard, and Spanish , for example, has a character that can’t be directly entered via our keyboard. Different operating systems have ...