• :: PLUS ::

• GCDrawKit - A complete framework for vector drawing
• split-s: Replacing methods
• The Omni Mouth » Helpify, the Omni Help Emitter
• Peachpit: Building a WordPress Blog People Want to Read - $29.99

Phusion is on a roll today. Not only did we just get a new Passenger, they’ve also just dropped a new REE (the Ruby patches for copy-on-write) that includes 64-bit support as well as compatibility with OS X and Solaris. They’ve also fitted the excellent RailsBench patches from Stefan Kaes that allows you to tweak the GC settings in Ruby if you need to.

This edition was sponsored by 37signals, Curve21, Dr Dispatch Transportation Software, InfoEther, Martian Interactive, New York Times, Shopify, Trevor Turk, and Utah Imaging.

November 29-December 5, 2008 Edition

Rails 2.3 development is still continuing at a healthy clip. Here’s an overview of what’s happened this week.

Application Templates

Rails now incorporates Jeremy McAnally’s rg application generator. What this means is that we now have template-based application generation built right into Rails; if you have a set of plugins you include in every application (among many other use cases), you can just set up a template once and use it over and over again when you run the rails command. Pratik Naik provided a thorough writeup of this feature over on his blog. commit

Find Improvements

Even the venerable code used by Active Record to talk to databases can be improved, and we had a couple of improvements checked in this week. First, the SQL generated for preloading records in has_and_belongs_to_many associations has had an extra “AS” excised, which makes it work better with some databases. Also, we now have a :having option on find (as well as on has_many and has_and_belongs_to_many associations) for filtering records in grouped finds. As those with heavy SQL backgrounds know, this allows filtering based on grouped results:

developers =  Developer.find(:all, :group => "salary", 
  :having => "sum(salary) >  10000", :select => "salary")

commit commit

Rack Integration

The tighter integration of Rails with Rack continues. This week saw the death of the venerable CGI processor within Rails, as well as the use of Rack to handle FCGI. There was also some refactoring down in the Rails tests to make them play nicer with Rack. commit commit

Configuration File Cleanup

Over the years, the default environment.rb file had gotten a bit cluttered with comments, random documentation, and settings that mot people don’t need. DHH took a few minutes to clean up the mess, and the current state of this file is much leaner. As part of the cleanup, session store configuration has been moved out to its own file. commit

No More Process Scripts

If you’re one of the (fairly rare) Rails developers who deploys in a fashion that depends on the inspector, reaper, and spawner scripts, you’ll need to know that those scripts are no longer included in core Rails. For Rails applications that are reployed with current alternatives like Passenger, these are just unnecessary baggage. But if you need them, you’ll be able to pick up copies via the irs_process_scripts plugin. commit

Odds and Ends

The fact that Rails checks for IP spoofing can be a nuisance for sites that do heavy traffic with cell phones, because their proxies don’t generally set things up right. If that’s you, you can now set ActionController::Base.ip_spoofing_check = false to disable the check entirely. commit

Rails.root now returns a Pathname object, which means you can use it directly with the join method to clean up existing code that uses File.join. commit

ActionController::Dispatcher now implements its own middleware stack, which you can see by running rake middleware. commit

Gem loading is smarter about missing dependencies. commit

auto_link now properly applies options (such as :target and :class) to generated e-mail links. commit

The Phusion team keeps blazing ahead with Passenger and improving it rapidly. They’ve just released version 2.0.5, which includes a few fixes and introduces compatibility with the Rack-based Edge Rails.

At 37signals, we’ve already switched over Ta-da List and are busy working on getting the rest of our suite running on Passenger. It’s just so much easier to deal with and the memory savings you get through REE are a nice cherry on top.

I keep getting a steady stream of success reports from all over the world as well. I’ve even read of a few people getting back into Rails development because Passenger finally took out the inconvenience of deploying.

It’s hard to argue with the usability. I’ve personally been setting up a new server running Ubuntu 8.10 and using Apache 2 with Passenger. The time it took me to go from a fresh install to a complete production setup was ridiculously low. There’s just so much less to worry about.

If you haven’t given Passenger a chance yet, now is definitely the time.

警告：在复制本博客代码时，空行存在中文空格，需要删除！！！

rails 04_demo_cucumber && cd 04_demo_cucumber
　
ruby script/generate cucumber
　
vi features/support/env.rb
require 'cucumber/rails/rspec'
require 'webrat' if !defined?(Webrat)
　
vi lib/tasks/cucumber.rake
# 在format和language之前是两个“-”，其它地方也是如此。
Cucumber::Rake::Task.new(:features) do |t|
  t.cucumber_opts = "—format pretty —language zh-CN" 
　
rake db:migrate
　
rake features
　
ruby script/generate rspec_scaffold post title:string body:text
　
ruby script/generate feature post title:string body:text
　
vi features/step_definitions/webrat_steps.rb
#require 'webrat' if !defined?(Webrat) # Because ...
　
rake db:migrate
　
vi features/manage_posts.feature
功能:管理帖子
  为了能够控制“帖子MVC”
  作为软件普通用户
  我要完成“帖子MCV”创建和删除帖子的功能
　
  场景: 创建一个新的帖子
    假如 我已经在创建新帖子页面
    当 我在输入框<post_title>中输入内容<lycom.de是什么网站>
    而且 我在输入框<post_body>中输入内容<lycom.de是一个Ruby/Rails技术新闻博客>
    而且 我点击按钮<Create>
    那么 我应该看到<lycom.de是什么网站>
    而且 我应该看到<lycom.de是一个Ruby/Rails技术新闻博客>
　
  场景: 删除第一个帖子
    假如 存在<4>个帖子
    当 我删除第一个帖子
    那么 还应该有<3>个帖子
　
vi features/step_definitions/post_steps.rb
require 'spec'
$:.unshift(File.dirname(__FILE__) + '/../../lib')
　
Given /我已经在创建新帖子页面/ do
  visits "/posts/new" 
end
　
When /我点击按钮<(.*)>/ do |btn_name|
  clicks_button btn_name
end
　
Given /存在<(\d+)>个帖子/ do |n|
  Post.transaction do
    Post.destroy_all
    n.to_i.times do |n|
      Post.create! :title => "Post #{n}" 
    end
  end
end
　
When /我在输入框<(.*)>中输入内容<(.*)>/ do |id,text|
  fills_in(id, :with => text)
end
　
When /我删除第一个帖子/ do
#  @post = Post.find(:first)
#  visits "/posts/#{@post.id}" 
  visits posts_url
  clicks_link "Destroy" 
end
　
Then /^我应该看到<(.*)>/ do |text|
  #response.body.should =~ /#{text}/
  response.body.should =~ Regexp.new(text)
end
　
Then /还应该有<(\d+)>个帖子/ do |n|
  Post.count.should == n.to_i
  response.should have_tag("table tr", n.to_i + 1) # There is a header row too
end
　
# 这个命令输出结果就是上面图
rake features　
或者
ruby script/cucumber -a zh-CN features/manage_posts.feature

• 说明
  
  • 通用即时通讯工具Adiumx解决了MSN账号在Apple上的即时通讯问题。
  • 另一款通用即时通讯工具Pidgin

• 说明
  
  • RJS教程是使用早期的Rails版本为基础的
  • RJS中文教程不是完整的翻译版本
  • 谁来着手以Rails 2.2版本重新写该教程的命令？

• 相关链接
  
  • RJS教程中文版本
  • RJS教程英文版本

• 相关链接
  
  • 翻译与Ruby on Rails相关的文章
  • 翻译中的电脑网络文章

That’s not actual code; I made that up.

Here’s something not made up: Stellar talent Daniel Davis has challenged me to present seven random facts about myself.

I’m not a fan of anything that smacks of a chain-letter, but Daniel rules so I’ll at least spew out some unneeded detail. (But I won’t be inflicting this on on seven other people. Feel free to take up the challenge on your own if you feel so inclined.)

0. Favorite color: Plaid
1. Born and raised on an island
2. First cat was named George Sand
3. First 45 RPM vinyl single bought: Frankenstein by Edgar Winter Group
4. Learned FORTRAN in college by coding cellular automata for a semester. Still do not understand how I passed the Numerical Analysis with FORTRAN course since, oddly enough, CA were not on any test or assignment.
5. Have never skied
6. Favorite movie is Metropolis, unless it’s Citizen Kane or Animal House

rails 03_demo_cucumber && cd 03_demo_cucumber
　
ruby script/generate cucumber
　
vi features/support/env.rb
require 'cucumber/rails/rspec'
require 'webrat' if !defined?(Webrat)
　
vi lib/tasks/cucumber.rake
# 在format和language之前是两个“-”，其它地方也是如此。
Cucumber::Rake::Task.new(:features) do |t|
  t.cucumber_opts = "—format pretty —language zh-CN" 
　
rake db:migrate
　
rake features
　
ruby script/generate rspec_scaffold post title:string body:text
　
script/generate feature post title:string body:text
　
vi features/step_definitions/webrat_steps.rb
#require 'webrat' if !defined?(Webrat) # Because ...
　
rake db:migrate
　
vi features/manage_posts.feature
  Scenario: Register new post
    Given I am on the new post page
    When I fill in "post_title" with "My post title:string" 
    And I fill in "post_body" with "My post body:text" 
    And I press "Create" 
    Then I should see "My post title:string" 
    And I should see "My post body:text" 
　
vi features/step_definitions/post_steps.rb
#Post.create! :name => "Post #{n}" 
Post.create! :title => "Post #{n}" 
　
# 这个命令什么也没有输出！说明了什么？为什么？
rake features
　
# 这个命令输出结果就是上面图
ruby script/cucumber -a en features/manage_posts.feature

• 参考资料
  
  • Testes funcionais no Rails usando o Cucumber

警告：在复制本博客代码时，空行存在中文空格，需要删除！！！
　

• 国际化功能问与答（三）：本地化翻译方法
  
  • 如何调用翻译函数？
    I18n.translate < key >
    如：
    I18n.translate :hello
    或者
    I18n.t :hello
  • 如何调用具有插值的翻译函数？
    I18n.translate < key >, < 插值 >
    如：
    I18n.translate :hello_with_name, :name=>”Hans”
  • 如何调用多元化的翻译函数？
    I18n.translate < key >, < 多元化变量 >
    如：
    I18n.translate :second_in_words, :count=>12
  • 如何调用具有命名空间的翻译函数？
    I18n.translate < 命名空间.key >, < 多元化变量 >
    如：
    I18n.translate “namespcae.second_in_words”, :count=>2
  • 如何调用时间对象的本地化函数？
    I18n.localize < 时间对象 >, :format=>< key >
    如：
    I18n.localize Time.now, :format=>:long
    或者
    I18n.l Time.now, :format=>:long
  • 如何调用日期对象的本地化函数？
    I18n.localize < 日期对象 >, :format=>< key >
    如：
    I18n.localize Date.parse(‘2008-11-29’)
  • 如何调用时间和日期名称的翻译函数？
    I18n.translate < 命名空间.key >
    如：
    I18n.translate(‘date.month_names’)
    I18n.translate(‘date.month_names’).last

rails 03_i18n_demo && cd 03_i18n_demo
　
vi config/environment.rb
  config.i18n.default_locale = :"zh-CN" 
　
touch config/locales/zh-CN.yml
vi config/locales/zh-CN.yml
zh-CN:
  hello: "世界，你好！" 
　
  hello_with_name: "{{name}}，你好！" 
　  
  second_in_words:
    one: "一秒钟" 
    two: "两秒钟" 
    other: "{{count}}秒钟" 
　
  namespace:
    second_in_words:
      one: "一秒钟" 
      two: "两秒钟" 
      other: "{{count}}秒钟" 
　
  time:
    formats:
      default: "%Y年%b%d日 %A %H:%M:%S %Z" 
      short: "%b%d日 %H时%M分" 
      long: "%Y年%b%d日 %H时%M分%S秒" 
    am: "上午" 
    pm: "下午" 
　
  date:
    formats:
      default: "%Y年%m月%d日" 
      abbr_default: "%Y-%m-%d" 
      short: "%b%d日" 
      long: "%Y年%b%d日" 
    day_names: [星期天, 星期一, 星期二, 星期三, 星期四, 星期五, 星期六]
    abbr_day_names: [日, 一, 二, 三, 四, 五, 六]
    month_names: [~, 一月, 二月, 三月, 四月, 五月, 六月, 七月, 八月, 九月, 十月, 十一月, 十二月]
    abbr_month_names: [~, 1月, 2月, 3月, 4月, 5月, 6月, 7月, 8月, 9月, 10月, 11月, 12月]
    order: [ :year, :month, :day ]

• 参考资料
  
  • rails/activesupport/test/ i18n_test.rb

• 注
  
  • 在图中的命令sc就是“ruby script/console”命令。

RubyConf2008 videos are now going up.

First one you should watch: David’s talk on Monkeybars: easy cross platform GUIs. Learn about making commercial desktop apps in Ruby.

Monkeybars means Ruby GUI apps done right.

Die Polemik zum Christkindlesmarkt von letztem Jahr gilt immer noch, aber da ich nun die meiste Zeit in München verbringe, tangiert mich das nur wenig. In München gibts natürlich auch Weihnachtsmärkte.

An der Adventskalenderfront stehen mal wieder an:

• Mathekalender 2008, ein Muss als Mathestudent?

• Perl Advent Calendar, aus Nostalgie.

• 24ways sollte auch wieder da sein.

Dieses Jahr Sterne mit Zirkel und Lineal konstruiert. 5-zackige, 17-zackige oder, wenn’s beliebt, 257- und 65537-zackige!

NP: Bearries—Explorer One