Rails 3.0 正式版发布了

1. 全新活动记录查询引擎

示例代码：

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 }

2. 为Action控制器添加了新的路由进程

示例代码：

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

3.全新Action Mailer组件

示例代码：

class Notifier < ActionMailer::Base

default :from =>

"Highrise <system@#{APPLICATION_DOMAIN}>"

def new_project(digest, project, person)

@digest, @project, @person = digest, project, person

attachments['digest.pdf'] = digest.to_pdf

attachments['logo.jpg'] = File.read(project.logo_path)

mail(

:subject => "Your digest for #{project.name}",

:to => person.email_address_with_name

) do |format|

format.text { render :text => "Something texty" }

format.html { render :text => "Something <i>texty</i>" }

end

end

end

4. 默认启用跨站点工具 XSS 保护

5. 告别字符编码问题困扰

6. 内部重构

7. 文档完善

8.支持MySQL2 gem

9.修正了自动加载的问题