I'm on Rails 4, and I'm following how to use rails i18n fallback features
My website only has 2 lang, zh, and en, and I want other language such as de, fr fallback to en, so I set as suggested above:
config.i18n.fallbacks =[:en]
But when I visiting http://localhost:3000/?locale=de it still reports
"de" is not a valid locale. (locale for en and zh works fine)
How can I fix this?
UPDATE: this is how I receive locale
def set_locale
I18n.locale = params[:locale] || I18n.default_locale
end
Add this to your config/application.rb
I18n.config.enforce_available_locales = false
Related
I'm trying out the internationalization of a Rails app with i18n. I did some small tests with 2 languages: english and french.
The problem I have is that i18n always translate to the default locale. So if it's english, everything will be in english, and the same with french.
Here is what I tried:
config/initializers/locales.rb
# Permitted locales available for the application
I18n.available_locales = [:en, :fr]
app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
def default_url_options
{ locale: I18n.locale }
end
end
config/application.rb
module LanguageApp
class Application < Rails::Application
...
config.i18n.load_path += Dir["#{Rails.root.to_s}/config/locales/**/*.{rb,yml}"]
config.i18n.default_locale = :en
# I change the default locale here to :fr or :en
end
end
config/routes.rb
root to: "home#index"
get '/:locale/about' => 'about#index'
get '/:locale' => 'home#index'
I organized my yml files like this:
config/locales/views/about/en.yml
en:
about: "This page is about us."
config/locales/views/about/fr.yml
fr:
about: "Cette page est à propos de nous."
config/locales/views/home/en.yml
en:
welcome: "Hello world"
config/locales/views/home/fr.yml
fr:
welcome: "Bonjour le monde"
And finally my views:
app/views/about/index.html.erb
About us page. <%= t(:about) %>
app/views/home/index.html.erb
This is the homepage. <%= t(:welcome) %>
I think the problem may come from the way I organized my yml files but I don't understand why i18n only translate to the default locale and 'ignore' the other language.
EDIT:
To try this out in the browser with the rails server running, I tried to visit these URL:
localhost:3000
localhost:3000/en
localhost:3000/fr
These 3 URL give me the same content, so the :fr locale doesn't actually work (it returns the same translation as :en)
Same for
localhost:3000/en/about
localhost:3000/fr/about
I also tried it in the rails console:
> I18n.t(:welcome, :en)
"Hello world"
> I18n.t(:welcome, :fr)
"Hello world"
First set the locale for the request:
class ApplicationController < ActionController::Base
around_action :switch_locale
def switch_locale(&action)
I18n.with_locale(params[:locale] || I18n.default_locale, &action)
end
def default_url_options
{ locale: I18n.locale }
end
end
Don't use I18n.locale= as many older answers / tutorials do.
I18n.locale can leak into subsequent requests served by the same
thread/process if it is not consistently set in every controller. For
example executing I18n.locale = :es in one POST requests will have
effects for all later requests to controllers that don't set the
locale, but only in that particular thread/process. For that reason,
instead of I18n.locale = you can use I18n.with_locale which does not
have this leak issue.
Rails Guides
If you want to create translations for specific views you should nest the keys instead of just using flat hashes:
en:
home:
welcome: "Hello World"
fr:
home:
welcome: "Bonjour le monde"
And then use an implicit lookup in the view:
<h1><%= t('.welcome') %></h1>
This resolves the key to home.welcome.
I'm using https://rubygems.org/gems/countries in a project and trying to get all countries names using a locale string for translations.
The locale 'DE', 'NO' or others are coming from the Google OCR API. The gem also has a method: ISO3166::Country.translations, which will return all the locale strings and the matching country, like: "AL"=>"Albania".
In this list, there is also featured the translation "NO"=>"Norway", but when using ISO3166::Country.all_translated('NO'), an error is thrown: I18nData::NoTranslationAvailable: I18nData::NoTranslationAvailable -- countries-NO.
Is there any workaround or fix to use all languages and get all translations? Or at least how is Norway not in the locales? The gem I think uses I18n as it's mentioned in the error, and the :no locale is not valid into I18n:
I18n.locale = :no => I18n::InvalidLocale: :no is not a valid locale
I18n.locale = :de => :de
Norwegian i18n locales are :nn (Nynorsk) and :nb (Bokmål), not :no.
i18n uses countries-NN.txt and countries-NB.txt
So need to use ISO3166::Country.all_translated('NN') and ISO3166::Country.all_translated('NB')
I have text like this
config/locales/en.yml
record_your_voice: 'Record your voice?'
When I'm seeing the page in Japanese local config, the text Record Your Voice is shown - the capitalized left side of code.
How can I use the text "Record your voice?" when corresponding Japanese text failed.
The answer is given here
in your application.rb file, you have the following options :
# rails will fallback to config.i18n.default_locale translation
config.i18n.fallbacks = true
# rails will fallback to en, no matter what is set as config.i18n.default_locale
config.i18n.fallbacks = [:en]
# fallbacks value can also be a hash - a map of fallbacks if you will
# missing translations of es and fr languages will fallback to english
# missing translations in german will fallback to french ('de' => 'fr')
config.i18n.fallbacks = {'es' => 'en', 'fr' => 'en', 'de' => 'fr'}
I have the following configured in my application.rb
config.i18n.available_locales = [:at, :de, :ch_de, :ch_fr, :fr, :int_en, :int_fr]
config.i18n.default_locale = :at
My default locale is set to :at (Austria). Which I require for Route Translation. Rails server won't start without it and to be fair it makes sense.
I now created a fallback map, which works just fine:
config.i18n.fallbacks = {'de' => 'at', 'ch_de' => 'at', 'ch_fr' => 'fr', 'int_fr' => 'fr', 'fr' => 'fr', 'int_en' => 'int_en'}
So basically I want all German speaking countries to fallback on :at, whilst all French speaking countries fall back to :fr.
However, I do NOT under any circumstances want :fr to fallback on :at. This is for SEO purposes as some french pages do not have metadata configured. So now the french pages would display the Austrian :at metadata entry. Which is wrong.
If I turn of fallbacks completely:
config.i18n.fallbacks = false
the following works fine in my views:
t('.metatitle', :default => "")
In that case if there is no translation available then nothing is displayed. However, the rest of the site that already exists relies on fallbacks - so this is not an option, considering the effort to implement the change.
Is there a way turn off fallbacks for individual translations?
Or can I implement the fallback map and make sure that the map doesn't fallback to it's default locale if for example no french :fr translation exists?
PS: The route translating gem that requires the default locale is this one here.
Thank you for your help !
Figured it out - and thought of sharing it with you:
If you wish to avoid fallback to the default locale on individual translation you simply have to send a empty fallback array like this:
t('.metatitle', :default => "", :fallback => [])
Et Voila !
This is tricky in Rails up to 6.1 because you need to beat the logic in the Railtie initializer which desperately wants to fallback to the default_locale.
To set the default fallback locale to nil you need to use the following code:
config.i18n.default_locale = "de-AT"
config.i18n.fallbacks.defaults = [[]] # If you just write [], then default_locale is used
config.i18n.fallbacks.map = {
:de => "de-AT",
"de-CH" => "de-AT",
}
Let's check:
$ rails console
2.7.2 :001 > I18n.fallbacks["de"]
=> [:de, :"de-AT"]
2.7.2 :002 > I18n.fallbacks["fr"]
=> [:fr]
2.7.2 :003 > I18n.fallbacks["de-CH"]
=> [:"de-CH", :de, :"de-AT"]
2.7.2 :004 > I18n.fallbacks["de-AT"]
=> [:"de-AT", :de]
2.7.2 :005 >
Not 100% what you want, but there just seems to be no way to prevent the fallbacks to go from country specific locale to generic language locale, when fallbacks are enabled.
Note #1: Your locales are a bit non-standard. AFAIK there is no 'at' locale, but only "de-AT".
Note #2: Some more subtleties and notes in this answer.
I asked a previous question regarding locale-setting. I am trying to set up fallbacks of various Norwegian languages to Norwegian Bokmal (:nb). The desired behaviour is that if a browser passes nn or no as locale requests, the I18n.locale will be set to either :nn or :no, and then in the absence of translations for these locales, :nb will be served to the browser.
Based on the answer to my previous question, I have this line in my application initialiser:
config.i18n.default_locale = :en
config.i18n.fallbacks = {:nn => [:nb], :no => [:nb]}
In rails console, this gives me the following results:
> I18n.fallbacks
=> {:en=>[:en]}
> I18n.fallbacks[:nn]
=> [:nn, :nb, :en]
> I18n.fallbacks[:no]
=> [:no, :nb, :en]
Using a browser that has only nn & no in the language list, this does not work- it falls back to the default locale of :en instead. Here's the request headers:
Accept-Language: "nn,no;q=0.5"
If I add :nb to the browser language stack, I am correctly served Norwegian content.
Is there something I am missing in this process?
You need to set I18n.locale based on the browser setting.
def set_locale
I18n.locale = extract_locale_from_accept_language_header
end
private
def extract_locale_from_accept_language_header
request.env['HTTP_ACCEPT_LANGUAGE'].scan(/^[a-z]{2}/).first
end
Taken from: http://guides.rubyonrails.org/i18n.html#setting-the-locale-from-the-client-supplied-information