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README.md |
Ruby I18n
Ruby Internationalization and localization solution.
Currently maintained by @radar.
Usage
Rails
You will most commonly use this library within a Rails app.
See the Rails Guide for an example of its usage.
Ruby (without Rails)
If you want to use this library without Rails, you can simply add i18n
to your Gemfile
:
gem 'i18n'
Then configure I18n with some translations, and a default locale:
I18n.load_path << Dir[File.expand_path("config/locales") + "/*.yml"]
I18n.default_locale = :en # (note that `en` is already the default!)
A simple translation file in your project might live at config/locales/en.yml
and look like:
en:
test: "This is a test"
You can then access this translation by doing:
I18n.t(:test)
You can switch locales in your project by setting I18n.locale
to a different value:
I18n.locale = :de
I18n.t(:test) # => "Dies ist ein Test"
Features
- translation and localization
- interpolation of values to translations (Ruby 1.9 compatible syntax)
- pluralization (CLDR compatible)
- customizable transliteration to ASCII
- flexible defaults
- bulk lookup
- lambdas as translation data
- custom key/scope separator
- custom exception handlers
- extensible architecture with a swappable backend
Pluggable Features
- Cache
- Pluralization: lambda pluralizers stored as translation data
- Locale fallbacks, RFC4647 compliant (optionally: RFC4646 locale validation)
- Gettext support
- Translation metadata
Alternative Backend
- Chain
- ActiveRecord (optionally: ActiveRecord::Missing and ActiveRecord::StoreProcs)
- KeyValue (uses active_support/json and cannot store procs)
For more information and lots of resources see the 'Resources' page on the wiki.
Tests
You can run tests both with
rake test
or justrake
- run any test file directly, e.g.
ruby -Ilib:test test/api/simple_test.rb
You can run all tests against all Gemfiles with
ruby test/run_all.rb
The structure of the test suite is a bit unusual as it uses modules to reuse particular tests in different test cases.
The reason for this is that we need to enforce the I18n API across various combinations of extensions. E.g. the Simple backend alone needs to support the same API as any combination of feature and/or optimization modules included to the Simple backend. We test this by reusing the same API definition (implemented as test methods) in test cases with different setups.
You can find the test cases that enforce the API in test/api. And you can find the API definition test methods in test/api/tests.
All other test cases (e.g. as defined in test/backend, test/core_ext) etc. follow the usual test setup and should be easy to grok.
More Documentation
Additional documentation can be found here: https://github.com/svenfuchs/i18n/wiki
Authors
Contributors
https://github.com/svenfuchs/i18n/graphs/contributors
License
MIT License. See the included MIT-LICENSE file.