RouteTranslator is a gem to allow you to manage the translations of your app routes with a simple dictionary format.
It started as a fork of the awesome translate_routes plugin by Raúl Murciano.
Right now it works with Rails 6.1 and 7.x
-
If you have this
routes.rbfile originally:Rails.application.routes.draw do namespace :admin do resources :cars end resources :cars end
The output of
bundle exec rails routeswould be:admin_cars GET /admin/cars(.:format) admin/cars#index POST /admin/cars(.:format) admin/cars#create new_admin_car GET /admin/cars/new(.:format) admin/cars#new edit_admin_car GET /admin/cars/:id/edit(.:format) admin/cars#edit admin_car GET /admin/cars/:id(.:format) admin/cars#show PUT /admin/cars/:id(.:format) admin/cars#update DELETE /admin/cars/:id(.:format) admin/cars#destroy cars GET /cars(.:format) cars#index POST /cars(.:format) cars#create new_car GET /cars/new(.:format) cars#new edit_car GET /cars/:id/edit(.:format) cars#edit car GET /cars/:id(.:format) cars#show PUT /cars/:id(.:format) cars#update DELETE /cars/:id(.:format) cars#destroy -
Add the gem to your
Gemfile:gem 'route_translator'
And execute
bundle install -
Generate the default initializer:
bundle exec rails g route_translator:install -
Wrap the groups of routes that you want to translate inside a
localizedblock:Rails.application.routes.draw do namespace :admin do resources :cars end localized do resources :cars get 'pricing', to: 'home#pricing', as: :pricing end end
And add the translations to your locale files, for example:
es: routes: cars: coches new: nuevo pricing: precios fr: routes: cars: voitures new: nouveau pricing: prix
-
Your routes are translated! Here's the output of your
bundle exec rails routesnow:Prefix Verb URI Pattern Controller#Action admin_cars GET /admin/cars(.:format) admin/cars#index POST /admin/cars(.:format) admin/cars#create new_admin_car GET /admin/cars/new(.:format) admin/cars#new edit_admin_car GET /admin/cars/:id/edit(.:format) admin/cars#edit admin_car GET /admin/cars/:id(.:format) admin/cars#show PATCH /admin/cars/:id(.:format) admin/cars#update PUT /admin/cars/:id(.:format) admin/cars#update DELETE /admin/cars/:id(.:format) admin/cars#destroy cars_fr GET /fr/voitures(.:format) cars#index {:locale=>"fr"} cars_es GET /es/coches(.:format) cars#index {:locale=>"es"} cars_en GET /cars(.:format) cars#index {:locale=>"en"} POST /fr/voitures(.:format) cars#create {:locale=>"fr"} POST /es/coches(.:format) cars#create {:locale=>"es"} POST /cars(.:format) cars#create {:locale=>"en"} new_car_fr GET /fr/voitures/nouveau(.:format) cars#new {:locale=>"fr"} new_car_es GET /es/coches/nuevo(.:format) cars#new {:locale=>"es"} new_car_en GET /cars/new(.:format) cars#new {:locale=>"en"} edit_car_fr GET /fr/voitures/:id/edit(.:format) cars#edit {:locale=>"fr"} edit_car_es GET /es/coches/:id/edit(.:format) cars#edit {:locale=>"es"} edit_car_en GET /cars/:id/edit(.:format) cars#edit {:locale=>"en"} car_fr GET /fr/voitures/:id(.:format) cars#show {:locale=>"fr"} car_es GET /es/coches/:id(.:format) cars#show {:locale=>"es"} car_en GET /cars/:id(.:format) cars#show {:locale=>"en"} PATCH /fr/voitures/:id(.:format) cars#update {:locale=>"fr"} PATCH /es/coches/:id(.:format) cars#update {:locale=>"es"} PATCH /cars/:id(.:format) cars#update {:locale=>"en"} PUT /fr/voitures/:id(.:format) cars#update {:locale=>"fr"} PUT /es/coches/:id(.:format) cars#update {:locale=>"es"} PUT /cars/:id(.:format) cars#update {:locale=>"en"} DELETE /fr/voitures/:id(.:format) cars#destroy {:locale=>"fr"} DELETE /es/coches/:id(.:format) cars#destroy {:locale=>"es"} DELETE /cars/:id(.:format) cars#destroy {:locale=>"en"} pricing_fr GET /fr/prix(.:format) home#pricing {:locale=>"fr"} pricing_es GET /es/precios(.:format) home#pricing {:locale=>"es"} pricing_en GET /pricing(.:format) home#pricing {:locale=>"en"}Note that only the routes inside a
localizedblock are translated.In :development environment, I18n is configured by default to not use fallback language. When a translation is missing, it uses the translation key last segment as fallback (
carsandnewin this example).In :production environment, you should either set
config.i18n.fallbacks = falseor set up translations for your routes in every languages. -
If you want to set
I18n.localefrom the url parameter locale, add the following line in yourApplicationControlleror in the controllers that have translated content:around_action :set_locale_from_url
Note: you might be tempted to use
before_actioninstead ofaround_action: just don't. That could lead to thread-related issues.
To change the language and reload the appropriate route while staying on the same page, use the following code snippet:
link_to url_for(locale: 'es'), hreflang: 'es', rel: 'alternate'Although locales are stored by Rails as a symbol (:es), when linking to a page in a different locale you need to use a string ('es'). Otherwise, instead of a namespaced route (/es/my-route) you will get a parameterized route (/my-route?locale=es).
If the page contains a localized slug, the above snippet does not work and a custom implementation is neede.
More information at Generating translated URLs
You can translate a namespace route by either its name or path option:
-
Wrap the namespaces that you want to translate inside a
localizedblock:Rails.application.routes.draw do localized do namespace :admin do resources :cars, only: :index end namespace :sold_cars, path: :sold do resources :cars, only: :index end end end
And add the translations to your locale files, for example:
es: routes: admin: administrador cars: coches new: nuevo pricing: precios sold: vendidos fr: routes: admin: administrateur cars: voitures new: nouveau pricing: prix sold: vendues
-
Your namespaces are translated! Here's the output of your
bundle exec rails routesnow:Prefix Verb URI Pattern Controller#Action admin_cars_fr GET /fr/administrateur/voitures(.:format) admin/cars#index {:locale=>"fr"} admin_cars_es GET /es/administrador/coches(.:format) admin/cars#index {:locale=>"es"} admin_cars_en GET /admin/cars(.:format) admin/cars#index {:locale=>"en"} sold_cars_cars_fr GET /fr/vendues/voitures(.:format) sold_cars/cars#index {:locale=>"fr"} sold_cars_cars_es GET /es/vendidos/coches(.:format) sold_cars/cars#index {:locale=>"es"} sold_cars_cars_en GET /sold/cars(.:format) sold_cars/cars#index {:locale=>"en"}
At the moment inflections are not supported, but you can use the following workaround:
localized do
resources :categories, path_names: { new: 'new_category' }
enden:
routes:
category: category
new_category: new
es:
routes:
category: categoria
new_category: nueva Prefix Verb URI Pattern Controller#Action
categories_es GET /es/categorias(.:format) categories#index {:locale=>"es"}
categories_en GET /categories(.:format) categories#index {:locale=>"en"}
POST /es/categorias(.:format) categories#create {:locale=>"es"}
POST /categories(.:format) categories#create {:locale=>"en"}
new_category_es GET /es/categorias/nueva(.:format) categories#new {:locale=>"es"}
new_category_en GET /categories/new(.:format) categories#new {:locale=>"en"}
edit_category_es GET /es/categorias/:id/edit(.:format) categories#edit {:locale=>"es"}
edit_category_en GET /categories/:id/edit(.:format) categories#edit {:locale=>"en"}
category_es GET /es/categorias/:id(.:format) categories#show {:locale=>"es"}
category_en GET /categories/:id(.:format) categories#show {:locale=>"en"}
PATCH /es/categorias/:id(.:format) categories#update {:locale=>"es"}
PATCH /categories/:id(.:format) categories#update {:locale=>"en"}
PUT /es/categorias/:id(.:format) categories#update {:locale=>"es"}
PUT /categories/:id(.:format) categories#update {:locale=>"en"}
DELETE /es/categorias/:id(.:format) categories#destroy {:locale=>"es"}
DELETE /categories/:id(.:format) categories#destroy {:locale=>"en"}
You can configure RouteTranslator via an initializer or using the different environment config files.
RouteTranslator.config do |config|
config.force_locale = true
config.locale_param_key = :my_locale
end| Option | Description | Default |
|---|---|---|
available_locales |
Limit the locales for which URLs should be generated for. Accepts an array of strings or symbols. When empty, translations will be generated for all I18n.available_locales |
[] |
disable_fallback |
Create routes only for locales that have translations. For example, if we have /examples and a translation is not provided for es, the route helper of examples_es will not be created. Useful when one uses this with a locale route constraint, so non-es routes can return a 404 on a Spanish website |
false |
force_locale |
Force the locale to be added to all generated route paths, even for the default locale | false |
generate_unlocalized_routes |
Add translated routes without deleting original unlocalized versions. Note: Autosets force_locale to true |
false |
generate_unnamed_unlocalized_routes |
Add the behavior of force_locale, but with a named default route which behaves as if generate_unlocalized_routes was true. root_path will redirect to /en or /es, depending on the value of I18n.locale |
false |
hide_locale |
Force the locale to be hidden on generated route paths | false |
host_locales |
Set I18n.locale based on request.host. Useful for apps accepting requests from more than one domain. See below for more details |
{} |
locale_param_key |
The param key used to set the locale to the newly generated routes | :locale |
locale_segment_proc |
The locale segment of the url will by default be locale.to_s.downcase. You can supply your own mechanism via a Proc that takes locale as an argument, e.g. ->(locale) { locale.to_s.upcase } |
false |
If you have an application serving requests from more than one domain, you might want to set I18n.locale dynamically based on which domain the request is coming from.
The host_locales option is a hash mapping hosts to locales, with full wildcard support to allow matching multiple domains/subdomains/tlds.
Host matching is case insensitive.
When a request hits your app from a domain matching one of the wild-card matchers defined in host_locales, the locale will be set to the specified locale.
Unless you specified the force_locale configuration option to true, that locale will be hidden from routes (acting like a dynamic hide_locale option).
Here are a few examples of possible mappings:
RouteTranslator.config.host_locales =
{ # Matches:
'*.es' => :es, # TLD: ['domain.es', 'subdomain.domain.es', 'www.long.string.of.subdomains.es'] etc.
'ru.wikipedia.*' => :ru, # Subdomain: ['ru.wikipedia.org', 'ru.wikipedia.net', 'ru.wikipedia.com'] etc.
'*.subdomain.domain.*' => :ru, # Mixture: ['subdomain.domain.org', 'www.subdomain.domain.net'] etc.
'news.bbc.co.uk' => :en, # Exact match: ['news.bbc.co.uk'] only
}In the case of a host matching more than once, the order in which the matchers are defined will be taken into account, like so:
RouteTranslator.config.host_locales = { 'russia.*' => :ru, '*.com' => :en } # 'russia.com' will have locale :ru
RouteTranslator.config.host_locales = { '*.com' => :en, 'russia.*' => :ru } # 'russia.com' will have locale :enIf host_locales option is set, the following options will be forced:
@config.force_locale = false
@config.generate_unlocalized_routes = false
@config.generate_unnamed_unlocalized_routes = false
@config.hide_locale = trueThis is to avoid odd behaviour brought about by route conflicts and because host_locales forces and hides the host-locale dynamically.
NOTE: locale from parameters has priority over the one from hosts.
If you have routes that (partially) share names in one locale, but must be translated differently in another locale, for example:
get 'people/favourites', to: 'people/products#favourites'
get 'favourites', to: 'products#favourites'Then it is possible to provide different translations for common parts of those routes by scoping translations by a controller's namespace:
es:
routes:
favourites: favoritos
controllers:
people/products:
favourites: fansRoutes will be translated as in:
people_products_favourites_es GET /people/products/fans(.:format) people/products#favourites {:locale=>"es"}
products_favourites_es GET /products/favoritos(.:format) products#favourites {:locale=>"es"}
It is also possible to translated resources scoped into a namespace. Example:
namespace :people do
resources :products, only: :index
endes:
routes:
controllers:
people/products:
products: productos_favoritosRoutes will be translated as in:
people_products_es GET /people/productos_favoritos(.:format) people/products#index {:locale=>"es"}
The gem will lookup translations under controllers scope first and then lookup translations under routes scope.
If you need complex routing as /:country/:locale/path/to/some/pages, you can specify the position of your locale parameter in the following way:
scope ':country/:locale' do
localized do
root to: 'content#homepage'
end
endTesting your controllers with routes-translator is easy, just add a locale parameter as String for your localized routes. Otherwise, an ActionController::UrlGenerationError will raise.
describe 'GET index' do
it 'should respond with success' do
# Remember to pass the locale param as String
get :index, locale: 'fr'
expect(response).to be_success
end
endPlease read through our contributing guidelines. Included are directions for opening issues, coding standards, and notes on development.
More over, if your pull request contains patches or features, you must include relevant unit tests.
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