Вышел Ruby on Rails 3!

Разработка Rails 3,0 продолжалась уже два года и наконец-то она завершена.

Основные изменения для Rails 3:

Новый Active Record:

Active Record теперь на движке Arel. Теперь гораздо легче создавать сложные запросы по нескольким итерациям. Реализована "ленивая загрузка". Вот простой пример:

users = User.where(:name => "david").limit(20)
users = users.where("age > 29")
# SELECT * FROM users
# WHERE name = "david" AND age > 29
# ORDER BY name
# LIMIT 20

users.order(:name).each { |user| puts user.name }

Новый маршрутизатор для контроллера действий

Новый синтаксис полностью в REST-стиле для большей гибкости:

resources :people do
resource :avatar
collection do
get :winners, :losers
end
end
# /sd34fgh/rooms
scope ':token', :token => /\w{5,5}/ do
resources :rooms
end
# /descriptions
# /pl/descriptions
# /en/descriptions
scope '(:locale)', :locale => /en|pl/ do
resources :descriptions
root :to => 'projects#index'

end

XSS защиты по умолчанию.

Была добавлена CRSF-защита для форм и защита от SQL-инъекций.

Rails 3.0 была разработана для работы с Ruby 1.8.7, Ruby 1.9.2, и JRuby 1.5.2.

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