ruby 两种语言的国际化：EN（英语）和ES（西班牙语），默认采用EN。

Posted 2021-05-16

class ApplicationController < ActionController::Base
  before_filter :set_locale
  
protected 
  def set_locale
    locale =  params[:locale] || session[:locale] || 
      (extact_locale_from_accept_language_header=='es' ? 'es' : 'en')
    session[:locale] = locale
    I18n.locale = locale
  end

private
  def extact_locale_from_accept_language_header
    request.env['HTTP_ACCEPT_LANGUAGE'].scan(/^[a-z]{2}/).first rescue "en"
  end
  
end