How to set default locale for a controller

Question

Is it possible to set a default locale of controller in Rails. Suppose the application supports different language like, fr, nl, en, cn etc and I want to use 'en' as a default language for the Admin Dashboard Controller. Please suggest

Answer 1

Just use a before_action callback to set the default locale.

class Admin::DashboardController
  before_action :set_default_locale

  # ...

  private
    def set_default_locale
      I18n.default_locale = :en
    end
end

However one thing to beware of is that I18n.default_locale is not thread safe and that setting it in one controller may have side effects in other controllers.