GetText but 3.5 x faster, 560 x less memory, simple, clean namespace (7 vs 34) and threadsafe!
It supports multiple backends (.mo, .po, .yml files, Database(ActiveRecord + any other), Chain, Loggers) and can easily be extended.
| Hash | FastGettext | GetText | ActiveSupport I18n::Simple | |
| Speed* | 0.82s | 1.36s | 4.88s | 21.77s |
| RAM* | 4K | 8K | 4480K | 10100K |
| Included backends | db, yml, mo, po, logger, chain | mo | yml (db/key-value/po/chain in other I18n backends) |
sudo gem install fast_gettext
From mo files (traditional/default)
FastGettext.add_text_domain('my_app',:path => 'locale')
Or po files (less maintenance than mo)
FastGettext.add_text_domain('my_app',:path => 'locale', :type => :po)
# :ignore_fuzzy => true to not use fuzzy translations
# :report_warning => false to hide warnings about obsolete/fuzzy translations
Or yaml files (use I18n syntax/indentation)
FastGettext.add_text_domain('my_app', :path => 'config/locales', :type => :yaml)
Or database (scaleable, good for many locales/translators)
# db access is cached <-> only first lookup hits the db
require "fast_gettext/translation_repository/db"
FastGettext::TranslationRepository::Db.require_models #load and include default models
FastGettext.add_text_domain('my_app', :type => :db, :model => TranslationKey)
Do this once in every Thread. (e.g. Rails -> ApplicationController)
FastGettext.text_domain = 'my_app'
FastGettext.available_locales = ['de','en','fr','en_US','en_UK'] # only allow these locales to be set (optional)
FastGettext.locale = 'de'
include FastGettext::Translation
_('Car') == 'Auto'
_('not-found') == 'not-found'
s_('Namespace|no-found') == 'not-found'
n_('Axis','Axis',3) == 'Achsen' #German plural of Axis
Generate .po or .mo files using GetText parser (example tasks at gettext_i18n_rails)
Tell Gettext where your .mo or .po files lie, e.g. for locale/de/my_app.po and locale/de/LC_MESSAGES/my_app.mo
FastGettext.add_text_domain('my_app',:path=>'locale')
Use the original GetText to create and manage po/mo-files. (Work on a po/mo parser & reader that is easier to use has started, contributions welcome @ get_pomo )
###Database
Example migration for ActiveRecord
The default plural seperator is |||| but you may overwrite it (or suggest a better one..).
This is usable with any model DataMapper/Sequel or any other(non-database) backend, the only thing you need to do is respond to the self.translation(key, locale) call. If you want to use your own models, have a look at the default models to see what you want/need to implement.
To manage translations via a Web GUI, use a Rails application and the translation_db_engine
Try the gettext_i18n_rails plugin, it simplifies the setup.
Try the translation_db_engine, to manage your translations in a db.
Setting available_locales,text_domain or locale will not work inside the evironment.rb,
since it runs in a different thread then e.g. controllers, so set them inside your application_controller.
#environment.rb after initializers
Object.send(:include,FastGettext::Translation)
FastGettext.add_text_domain('accounting',:path=>'locale')
FastGettext.add_text_domain('frontend',:path=>'locale')
...
#application_controller.rb
class ApplicationController ...
include FastGettext::Translation
before_filter :set_locale
def set_locale
FastGettext.available_locales = ['de','en',...]
FastGettext.text_domain = 'frontend'
session[:locale] = I18n.locale = FastGettext.set_locale(params[:locale] || session[:locale] || request.env['HTTP_ACCEPT_LANGUAGE'] || 'en')
end
Plurals are selected by index, think of it as ['car', 'cars'][index]
A pluralisation rule decides which form to use e.g. in english its count == 1 ? 0 : 1.
If you have any languages that do not fit this rule, you have to add a custom pluralisation rule.
Via Ruby:
FastGettext.pluralisation_rule = lamda{|count| count > 5 ? 1 : (count > 2 ? 0 : 2)}
Via mo/pofile:
Plural-Forms: nplurals=2; plural=n==2?3:4;
Plural expressions for all languages.
###default_text_domain
If you only use one text domain, setting FastGettext.default_text_domain = 'app'
is sufficient and no more text_domain= is needed
###default_locale
If the simple rule of "first availble_locale or 'en'" is not suficcient for you, set FastGettext.default_locale = 'de'.
###default_available_locales Fallback when no available_locales are set
###Chains You can use any number of repositories to find a translation. Simply add them to a chain and when the first cannot translate a given key, the next is asked and so forth.
repos = [
FastGettext::TranslationRepository.build('new', :path=>'....'),
FastGettext::TranslationRepository.build('old', :path=>'....')
]
FastGettext.add_text_domain 'combined', :type=>:chain, :chain=>repos
###Logger When you want to know which keys could not be translated or were used, add a Logger to a Chain:
repos = [
FastGettext::TranslationRepository.build('app', :path=>'....')
FastGettext::TranslationRepository.build('logger', :type=>:logger, :callback=>lamda{|key_or_array_of_ids| ... }),
}
FastGettext.add_text_domain 'combined', :type=>:chain, :chain=>repos
If the Logger is in position #1 it will see all translations, if it is in position #2 it will only see the unfound.
Unfound may not always mean missing, if you choose not to translate a word because the key is a good translation, it will appear nevertheless.
A lambda or anything that responds to call will do as callback. A good starting point may be examples/missing_translations_logger.rb.
###Plugins Want a xml version ? Write your own TranslationRepository!
#fast_gettext/translation_repository/xxx.rb
module FastGettext
module TranslationRepository
class Wtf
define initialize(name,options), [key], plural(*keys) and
either inherit from TranslationRepository::Base or define available_locales and pluralisation_rule
end
end
end
- Add a fallback for Iconv.conv in ruby 1.9.4 -> lib/fast_gettext/vendor/iconv
- YML backend that reads ActiveSupport::I18n files
Mo/Po-file parsing from Masao Mutoh, see vendor/README
- geekq
- Matt Sanford
- Antonio Terceiro
- J. Pablo Fernández
- Rudolf Gavlas
- Ramón Cahenzli
- Rainux Luo
- Dmitry Borodaenko
- Kouhei Sutou
Michael Grosser
michael@grosser.it
License: MIT
