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rmagick

leekiang — Sun, 16 May 2010 19:12:00 GMT

在windows上直接gem安装rmagick时报Building native extensions. Error installing rmagick windows

1 �?a target="_blank">http://rubyforge.org/projects/rmagick/ 下蝲rmagick-win32 对应的zip�?没找到ruby1.8.7�?.9的，只好先下1.8.6�?/div>

2 解压zip��C��个��时目录，在该目录中有一个ImageMagick的ext安装文�g,安装�?/div>

3 开一个命令行�H�口�Q�cd到解压的临时目录�Q�敲入命令： gem install rmagick.

4.�?span id="ctl00_MainContentPlaceholder_ctl01_ctl00_lblEntry">ImageMagick 的安装�\径放到path环境变量里面

可能出现的问题：

1.CORE_RL_magick_.dll找不刎ͼ�

�?span id="ctl00_MainContentPlaceholder_ctl01_ctl00_lblEntry">ImageMagick 的安装�\径放到path环境变量里面��d��OK了�?/div>

2.gem install rmagick ��p�|

更新gem�? 版本�Q?gem update --system)

参考http://wxmfly.javaeye.com/blog/216787

leekiang 2010-05-17 03:12 发表评论

ruby�W�记

leekiang — Tue, 16 Mar 2010 16:53:00 GMT

1,数组
arr = [1,2,3,4]
puts arr.find{|i| i%2 == 0 } #find�q�回满��条�g的第一条记�?br />puts arr.select{|i| i%2 == 0} #select�q�回满��条�g的全部记�?br />arr.unshift(0) 在头部添�?br />arr.push(5,6) 在尾部添�?br />arr<<7 与push的不同在于push可以攑֤��?br />arr.sort.reverse 先排序再倒置�Q�即降序

leekiang 2010-03-17 00:53 发表评论

rcov

leekiang — Sat, 06 Mar 2010 05:00:00 GMT

1,安装rcov0.9.9,环境为ruby1.8,6,rails2.3.5
安装之前必须先安装DevKit�Q�http://github.com/oneclick/rubyinstaller/wiki/Development-Kit里有详细的安装步�?br />主要步骤:
1)下蝲DevKit解压到c:\DevKit目录�Q�下载地址为http://rubyinstaller.org/downloads/
2)C:\DevKit>ruby dk.rb init
3)C:\DevKit>ruby dk.rb install
4)C:\DevKit>gem install rdiscount --platform=ruby 我觉得这一步只是验证DevKit是否安装成功�Q�也可以不做的�?br />5)最好把c:\DevKit\bin加到环境变量

2,rcov test/functional/*.rb test/unit/*.rb --output=public/rcov --rails
会生成一大堆反映��试覆盖情况的网��|��到public/rcov目录下，如果不写--output�Q�则�q�些�|�页会放到项目下新徏的coverage目录�?br />
3,在项目下执行rake stats可看��C��码统计，以及代码和测试代码的比例�?br />
4,在netbeans6.9里开始怎么也显�C�Z��了覆盖率报告�Q�后来打开一个模型类�Q�点��L��行测试，然后��有了�?br />而且可以昄��每一行代码是否被��试�?看了几个�cȝ��覆盖情况�Q�感觉有的方法里的代码明明被��了�Q�但囑�Ş里显�C�没有测到�?br />http://blogs.sun.com/tor/entry/netbeans_screenshot_of_the_week6后面的评论里有�h写了他是如何做的�?br />
http://www.jairrillo.com/blog/2008/08/18/introduction-to-rspec-part-2-testing-the-rails-model/
http://eigenclass.org/hiki.rb?rcov#l2
http://stackoverflow.com/questions/3451346/cannot-install-rcov-from-gem

leekiang 2010-03-06 13:00 发表评论

rails中的REST

leekiang — Sat, 20 Feb 2010 18:53:00 GMT

http://mypages.javaeye.com/blog/291991

leekiang 2010-02-21 02:53 发表评论

ruby解析html

leekiang — Sat, 20 Feb 2010 10:14:00 GMT

open-uri库是ruby的标准附加库中所带的�Q��\�?br />C:\Ruby1.8.7\lib\ruby\1.8\open-uri.rb

require 'open-uri'
open('c:/boot.ini'){|file|
puts file.class #File
}
open('http://coderlee.cnblogs.com'){|file|
puts file.class #Tempfile
}

可以看出�Q�打开一个本机文件的块参数是File�c�d��Q�而打开一个uri的块参数是一个Tempfile�c�d��。还有一点要注意�Q�就是open-uri里面的open�Ҏ��会自动对302 redirection重定向地址�q�行�q�踪讉K��Q�而Net::HTTP#get�Ҏ��则不会自动追�t?02重定向地址�?摘自�q�里)

require 'nokogiri'
require 'open-uri'
doc = Nokogiri::HTML(open('http://www.huomo.cn'))
doc.search("//h2/a").each do |link|
puts link.inner_text
puts link[:href]
end

url = 'http://www.google.cn/search?hl=zh-CN&q=%BC%D6%B1%A6%D3%F1'
doc = Nokogiri::HTML.parse(open(url), nil, 'gb2312')#不这样写会有��q��

doc.css('h3.r a.l').each do |link|
  puts link.inner_text
end

doc.xpath('//h3/a[@class="l"]').each do |link|
  puts link.content
end

doc.search('h3.r a.l', '//h3/a[@class="l"]').each do |link|
  puts link.content
end

参考http://www.javaeye.com/topic/557485

leekiang 2010-02-20 18:14 发表评论

rails处理长执行时间的��h��

leekiang — Fri, 19 Feb 2010 20:42:00 GMT

另一个常见的问题是当应用软�g要执行一个需旉��的请求时�Q�处理不当。如果实现得不好�Q�会让处理这个web��h��的handler很长旉��没有反应�?br />
�q�个问题是在人机界面斚w��很普遍，而且也有一个普遍的解决�Ҏ�� -- 把�Q务交�l�一个背景运行的�q�程或线�E�。�Q何开发过桌面应用的�h都会觉得很熟悉。但是有时候如果开发者把切换和通信做得不好�Q�也会碰到麻烦�?br />
一个我觉得较好的办法，而幸好我的ThoughtWorks同事们也同意�Q�就是��用一个actor。在�q�个模型里，web��h��的handler把需旉��的请求包装�ؓ一个命令（command�Q�，然后放进队列�Q�queue�Q�内。在背景�q�行的actor��q��察着�q�个queue�Q�从queue中提出�ƈ且执行这个命令。当它把�q�个命��o执行完了�Q�就通知前台界面的actor。通常�q�个queue一开始会是数据库的一个表�Q�之后如有需要的话，再把它改��Z��个消息队列（message queue�Q��?br />
和ActiveRecord的漏�z�一��P��我提赯��个不是因为它是Rails里特有的问题�Q�我们在各种应用也会看到同样的问题。值得在这里带出是因�ؓ用Rails的�h们往往很容易忘了有�q�样的情况发生，也忘了有�q�样的模式去解决。我们发现Rails把web开发中重复又重复的环节变得��易和快，但是复杂的环节是仍然存在的�?br />
来源:http://rickylui.com/lionwiki/index.php?page=Ruby+at+ThoughtWorks
http://martinfowler.com/articles/rubyAtThoughtWorks.html

leekiang 2010-02-20 04:42 发表评论

rails调试

leekiang — Fri, 19 Feb 2010 15:22:00 GMT

在netbeans6.8(使用ruby1.8.6)的一个rails��目上右键点�?调试",提示未安装版本与0\.4\..*模式匚w��的ruby-debug-ide 点击"安装快速调试器",出现如下的错�?
------------------------------------------------------
Building native extensions. This could take a while...
ERROR: Error installing ruby-debug-ide:
    ERROR: Failed to build gem native extension.

c:/ruby/bin/ruby.exe mkrf_conf.rb
Building native extensions. This could take a while...

Gem files will remain installed in c:/ruby/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.9 for inspection.
Results logged to c:/ruby/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.9/ext/gem_make.out
------------------------------------------------------
然后在C:\ruby\lib\ruby\gems\1.8\gems下发��C��刚刚生成的ruby-debug-ide-0.4.9目录和ruby-debug-base-0.10.3目录�?br />
接着在cmd里gem install ruby-debug�Q�也报错�Q?br />------------------------------
Building native extensions. This could take a while...
ERROR: Error installing ruby-debug:
        ERROR: Failed to build gem native extension.

c:/ruby/bin/ruby.exe extconf.rb
creating Makefile
nmake
'nmake' 不是内部或外部命令，也不是可�q�行的程�?br />或批处理文�g�?br />
Gem files will remain installed in c:/ruby/lib/ruby/gems/1.8/gems/ruby-debug-bas
e-0.10.3 for inspection.
Results logged to c:/ruby/lib/ruby/gems/1.8/gems/ruby-debug-base-0.10.3/ext/gem_
make.out
-------------------------------
然后发现ruby-debug-base-0.10.3目录重新生成了�?br />
现在说一下解��x��?
1�Q�下载http://rubyforge.iasi.roedu.net/gems/ruby-debug-base-0.9.3-mswin32.gem
   gem install ruby-debug-base-0.9.3-mswin32.gem
2, 去http://rubyforge.org/projects/debug-commons/下蝲ruby-debug-ide-0.4.6.gem
   gem install ruby-debug-ide-0.4.6.gem
   版本不能高于0.4.6,如果高了都报
      ERROR: Failed to build gem native extension.
   0.4.7见ruby-debug-ide-0.4.7\ext\extconf.rb
   0.4.9见ruby-debug-ide-0.4.9\ext\mkrf_conf.rb
   0.4.6压根��没有ext目录
   有�h说要装什么linecache.gem�Q�我没安装�?br />   �q�有��了ruby-debug.gem,我也没安装�?br />   在http://rubyforge.mirrors.roedu.net/gems里能扑ֈ�老版本�?br />
感谢http://hlee.javaeye.com/blog/576237

在netbeans里调试时发现有问�?那个�l�三角不能点多了�Q�否则会影响后面的调试�?br />

另外不明白gem除了把文件拷到gems目录下，�q�做了什么�?br />

后面都是记录�Q�仅供参考�?br />�?a >How to enable Ruby debug in RubyMine 2.0 on Windows里说
(If you installed Ruby with the zip binary, reinstall it using the one-click installer as found here. That's because currently the ruby debugger ide only works on Windows using a RubyInstaller installation). Also verify that Ruby's root path doesn't include spaces.

...�?br />
...�?
...�?
Open with a text editor the file command.rb that's part of the installed ruby-debug-ide19 gem. In my case, that file was under folder C:\Programmi\Ruby19\lib\ruby\gems\1.9.1\gems\ruby-debug-ide19-0.4.12\lib\ruby-debug
Modify the beginning of procedure debug_eval (at line 120) so to enter a new statement between statements str = str.to_s and max_time = 10. The new statement to enter is:
return "" if str == "$FILENAME"
At the end, the procedure debug_eval should begin like this:
def debug_eval(str, b = get_binding)
  begin str = str.to_s
  return "" if str == "$FILENAME"
  max_time = 10
  to_inspect = str.gsub(/\\n/, "\n")

ruby-debug to Ruby 1.9
如果使用的是ruby1.9,�?a >Installation: IDE version�?a >NetBeans 6.7.1 IDE updates.ruby-debug19 only works on Windows using a RubyInstaller installation,Do not install to a path that has a space inside of it.In both cases, you will also need to download and install the DevKit.
原来�?a >ruby-debug-ide 0.4.7 的release notes里说了原�?
Patch by Mark Moseley supporting ruby-debug-base19.
Dynamically installs right ruby-debug-base dependency depending on the
version of a Ruby platform being used. ruby-debug-base19 is the only solution
these days for 1.9 debugging, so might be temporary solution until ruby-debug
projects brings official version.
另外参见Ruby 2.0 Beta Issue: Error installing ruby-debug-ide19
Debug supported for ruby 1.8.7?

�?a >从下午弄到深夜还没解军_��于ruby-debug-ide的问�?/a>发现有�h解决�?
我试了下ruby1.8.6�q�是不行�Q�还是报那个异常。没法换成NetBeans6.8集成的jruby�Q�集成的jruby中自带ruby-debug-ide�Q�OK了。在�q�里提示一下，不要选jruby.exe要选jruby.bat�Q�希望对遇到同样问题的�h有所帮助�?br />问题解决�Q�解��x��骤：1.下蝲rubyinstaller�Q�安装；2.下蝲devkit�Q�解压到根目录后�Q�修�?“ruby路径”\devkit\msys\1.0.11\etc\fstab�?br />“ruby路径�?devkit/gcc/3.4.5/mingw32
“ruby路径�?devkit/msys/1.0.11/usr/local /usr/local
然后在命令行�H�口�Q�gem install linecache19 �q�个要好长时��_��耐心�{�待。然后gem install ruby-debug-ide19�Q�这个就快了。这��OK了，不要在rubymine中安装ruby-debug-ide19和linecache19�Q�会报错�?br />

某�h�?a target="_blank">解决办法:
在RubyMine里调试提�C�需要安装ruby-debug-ide�Q�但是安装的�q�程有问题，提示�Q?br /> ERROR: Failed to build gem native extension.
于是惌��开gem包，把里面的extension��L��。但是编辑完之后再用winrar打包gem��p��不出来了。看来压�~�的格式也很重要。于是找来了tar和gzip两个工具�Q�tar�q�好�Q�用gzip解压和压�~�过的文件还是认不出来。只有另惛_��的办法了。突然想到把文�g解压之后�Q�应该可以用gem的工��h��生成一个gem安装文�g吧。于是找了一��制作gem的教�E�，把extension��L��之后制作了一个gem�Q�居然可以顺序安装了。然后重新打开 RubyMine也可以调试了�?br />
Trying to install ruby-debug-ide on jruby 1.2.0
http://youtrack.jetbrains.net/issue/RUBY-5341
好帖Ruby调试器一�?/a>
一�?a >视频
http://netbeans.org/kb/60/ruby/debugger-screencast.html

201010补充:
�Ҏ��没有那么复杂,
装DevKit,把DevKit\bin讄��为环境变�?然后��可以在netbean中安装和执行�?br />

leekiang 2010-02-19 23:22 发表评论

leekiang — Wed, 17 Feb 2010 18:42:00 GMT

posts_url               http://localhost:3000/posts
posts_path              /posts
new_post_path           /posts/new
edit_post_path(post)    /post/:id/edit
redirect_to(@post)     会重定向�?post/:id�?也就是posts_controller的show

Expected response to be a <:redirect>, but was <200>
��试时报错，后发现是��试里提供的数据没有通过验证

leekiang 2010-02-18 02:42 发表评论

��试redmine时报gem�~�失

leekiang — Wed, 17 Feb 2010 12:01:00 GMT

�q�行redmine的测试时报错
Missing these required gems:
  thoughtbot-shoulda  
  nofxx-object_daddy  
  mocha
在控制台里执行gem install mocha
              gem install shoulda
            和gem install object_daddy
到C:\ruby\lib\ruby\gems\1.8\gems下去�?br />发现多了object_daddy-0.4.1,shoulda-2.10.3和mocha-0.9.8�q?个目�?br />再执行测试，不报�~�少mocha了，但还报缺���另外两个jar

在http://www.redmine.org/boards/2/topics/11130扑ֈ�了办�?br />rake gems:install RAILS_ENV=test
以下是在netbeans控制台里输出的信�?br />gem.bat install thoughtbot-shoulda --source http://gems.github.com
Successfully installed thoughtbot-shoulda-2.10.2
gem.bat install nofxx-object_daddy --source http://gems.github.com
Successfully installed nofxx-object_daddy-0.4.1

然后到C:\ruby\lib\ruby\gems\1.8\gems下去看，发现多了两个目录
nofxx-object_daddy-0.4.1和thoughtbot-shoulda-2.10.2,
奇怪的是与前面相比�Q�目录名和大���都变了�?br />

leekiang 2010-02-17 20:01 发表评论

ruby�W�记

leekiang — Wed, 17 Feb 2010 03:47:00 GMT

1,在ruby�?一个方法的最后一个表辑ּ�求值所得的值就是该�Ҏ��的返回�?�q�时可以��L��return
2,ruby的符�?symbol)
symbol都以冒号作�ؓ前缀。rails常常用符��h��l�方法参数命�?以及用作hash的键。譬如说:
redirect_to :action=>"edit",:id=>params[:id]
3,

class Order < ActiveRecord::Base
has_many :line_items

def self.find_all_unpaid
   find(:all, 'paid = 0' )
end

def total
   sum = 0
   line_items.each {|li| sum += li.total}
end
end

在方法前加上"self.",该方法就变�ؓ�c�L��法，可以在类层面上直接调�?Order.find_all_unpaid

4,实例变量的名字以"@"开�?br />5,在rails��目�?font color="#0000ff">rake doc:app可以为rails��目创徏html格式的文�?攑֜�doc/app目录里�?br />6,模块(module)与类差不多，区别是无法创建模块的实例�?br /> 我的感觉��是module是代码片�D�，可以在�Q何类里引入作��cȝ��一部分�?br />

leekiang 2010-02-17 11:47 发表评论

rails功能��试

leekiang — Mon, 15 Feb 2010 11:22:00 GMT

				assert_select
				assert_not_nil assigns(:people)
				

				assigns是一个特�D�的变量。如果您在控制器中创��Z��一个实例变量，那么�q�个变量
���可以直接在视图模板中��用。这一机制背后的原理其实很���单：Rails首先通过反射
���控制器中的变量拯�����C��个容器中�Q�其后又���该容器中的变量拯���回视囑֮�例�?br />而这个容器其实就是上面提到的assigns�Q�所以前面的断言可以被理解�ؓ“控制器应该
创徏一个名�?strong>people的非�I�变量”�?br />
http://www.javaeye.com/topic/481193
http://www.infoq.com/cn/articles/rails-for-java-excerpt
http://www.ibm.com/developerworks/cn/web/wa-rails4/
http://www.tkk7.com/cap/articles/rails_test.html

��C��Rails Test Prescriptions

leekiang 2010-02-15 19:22 发表评论

Flash—“动作”间的通信

leekiang — Mon, 15 Feb 2010 10:34:00 GMT

通常�Q�更新操作在�l�束时会重定向到其它action。那么如何在重定向过�E�中保证状态消息不会丢失呢�Q�如果将状态消息保存到成员变量中，会导致这一消息�? 重定向后丢失。而��用session来作��Z��存机制虽然可行，但开发�h员必��d��随后执行清理session�q�一很容易被遗漏的操作。因此，Rails提供了flash作�ؓ解决�Ҏ��。��用flash�Ӟ��消息首先被保存到session中，以便本次重定向可以��用。而在下一�ơ重定向后，Rails会自动在 session中清理该消息。从而有效地解决了更新操作的状态信息在重定向时的保存问题�?br />http://www.infoq.com/cn/articles/rails-for-java-excerpt
http://jbf034.javaeye.com/blog/222730

leekiang 2010-02-15 18:34 发表评论

“过滤器�?before,after,around)

leekiang — Mon, 15 Feb 2010 10:34:00 GMT

http://jbf034.javaeye.com/blog/222755

leekiang 2010-02-15 18:34 发表评论

Rails for Java Developers

leekiang — Sun, 14 Feb 2010 19:19:00 GMT

Java开发者的Rails之�\
Rails for Java Developers

leekiang 2010-02-15 03:19 发表评论

rails应用的认证和授权

leekiang — Sun, 14 Feb 2010 13:00:00 GMT

一个带完整的RBAC授权�pȝ��的rails应用
http://www.javaeye.com/topic/215074

RESTful_ACL

declarative_authorization
aegis
cancan           http://github.com/ryanb/cancan
Authologic
acl9             http://github.com/be9/acl9
role_requirement http://github.com/timcharper/role_requirement
ActiveRbac

restful_authentication
1�Q�ruby script/plugin install http://svn.techno-weenie.net/projects/plugins/restful_authentication/
��目右键->rails 插�g->资源库里��d��url�Q�http://svn.techno-weenie.net/projects/plugins
->新插仉��扑ֈ�restful_authentication然后安装
2, ruby script/generate authenticated user sessions
Right-click on your application in the projects pane and choose
"Generate". In the dialog box that comes up, choose "authenticated"
from the drop-down "Generator" menu near the top, and in the arguments
field enter "user sessions" (without the quotes). Hit OK.
----------------------------------------------------------------------
Don't forget to:

Try these for some familiar login URLs if you like:

map.activate '/activate/:activation_code', :controller => 'users', :action => 'activate', :activation_code => nil
map.signup '/signup', :controller => 'users', :action => 'new'
map.login '/login', :controller => 'sessions', :action => 'new'
map.logout '/logout', :controller => 'sessions', :action => 'destroy'

----------------------------------------------------------------------
      create app/views/sessions
      create app/views/users
      create app/models/user.rb
      create app/controllers/sessions_controller.rb
      create app/controllers/users_controller.rb
      create lib/authenticated_system.rb
      create lib/authenticated_test_helper.rb
      create test/functional/sessions_controller_test.rb
      create test/functional/users_controller_test.rb
      create test/unit/user_test.rb
      create test/fixtures/users.yml
      create app/helpers/sessions_helper.rb
      create app/helpers/users_helper.rb
      create app/views/sessions/new.html.erb
      create app/views/users/new.html.erb
      create db/migrate/20100218184435_create_users.rb
      route map.resource :session
      route map.resources :users

�q�行��试时要把SessionsControllerTest和UsersControllerTest都改为��承ActionController::TestCase,同时把fixtures :users注释掉�?br />
要��用current_user和logged_in? helper�Ҏ��的话要在ApplicationController�?span style="">include AuthenticatedSystem

resource与resources的区别见http://api.rubyonrails.org/classes/ActionController/Resources.html

http://www.javaeye.com/topic/353831
http://www.javaeye.com/topic/177508
http://hideto.javaeye.com/blog/115157
https://github.com/nakajima/roleful

leekiang 2010-02-14 21:00 发表评论

leekiang — Sun, 14 Feb 2010 10:51:00 GMT

http://www.pragprog.com/wikis/wiki/ChangesInRails23
1�Q?app/controllers下的application.rb is now application_controller.rb

leekiang 2010-02-14 18:51 发表评论

rails主题(theme)

leekiang — Sun, 14 Feb 2010 10:28:00 GMT

1,http://kyoleelqh.javaeye.com/blog/169857

2,Scribbish

leekiang 2010-02-14 18:28 发表评论

rails3

leekiang — Sun, 14 Feb 2010 09:58:00 GMT

http://m.onkey.org/2010/1/22/active-record-query-interface
http://www.pragprog.com/wikis/wiki/ChangesInRails30

leekiang 2010-02-14 17:58 发表评论

rails调试以及日志

leekiang — Sat, 13 Feb 2010 18:24:00 GMT

1�Q�要在控制台输出log,在environment.rb里加:
config.log_level = :debug
config.logger = Logger.new(STDERR)
同时在controller里加一行logger.info 'test'
成功了，但奇怪的是log_level设�ؓdubug和info没有区别

2, http://wordpress.javaeye.com/blog/134544
rails的日志文件存在于app/log下面。对于不同环境��生的日志内容会有差别。development下会把每�ơ对数据库的讉K��代码包含�q�去�Q�production会省略，不过也有很多的内宏V�? 如果只希望在production环境下，输入��量的log, 则只需要在config/environments/production.rb中更改：
config.log_level = :warn
附带log level:
Rails可以通过选择不同的log level来控制log文�g的输出，可以使用的log level�?debug, :info, :warn, :error, :fatal�?:debug level提供最详细的log, 可以��每一条sql都记录下来�?info level是production环境下的默认讄��Q�不会写出sql的执行情况，但也会很详细�Q�如果是ActiveMailer�Q�它会记录下每封信的内容�Q�Log文�g内容��是快速增�ѝ��ؓ了避免Log把空间塞满的情况发生�Q�要注意定期清除Log�Q�另外是选择:warn level�{�log level, 只记录重要的信息.

是否可以�q�么��_��environment.rb对三个环境都生效,production.rb只对生��环境有效.

3�Q�在单元��试�cȝ��Ҏ��里加了logger.dubug 'test'�Q�执行测试时报错�Q�后改�ؓ
RAILS_DEFAULT_LOGGER.debug 'test' 成功�?br />

Rails Logging Tips —�?Rails写日志的提示http://www.cgpad.com/SPAN/articles_show/167
http://hlee.javaeye.com/blog/358516

leekiang 2010-02-14 02:24 发表评论

rails事务

leekiang — Sat, 13 Feb 2010 17:04:00 GMT

1,around_filter�q�行action的自动事务处�?br />在controller里面可以使用around_filter来进行action的包装，当action中弹出异常的时候渲染一个特�D�的出错 ��面。将action代码包装在ActiveRecord::Base.transaction函数的block中执行，当引发异常后截获�q��新抛��Z��? ActiveRecord::Rollback异常让rails��数据回滚掉。ActiveRecord::Base.transaction�? ActiveRecord::Rollback异常处理后不会再��该异常往外面抛�?/div>

around_filter :around_action_filter

protected

def transaction

ret = true

ActiveRecord::Base.transaction do

begin

yield if block_given?

rescue Exception => ex

set_notice(ex.message)

ret = ex.message

raise ActiveRecord::Rollback, ex.message

end

return ret

end

def around_action_filter

return yield if request.get?

redirect_to(:controller => "error_display", :action => "error_notice") if

transaction { yield if block_given? } != true

end

�q�里的transaction函数可以用在action里面作�ؓ手动事务处理的解军_��法�?br />http://www.cgpad.com/SPAN/articles_show/940

leekiang 2010-02-14 01:04 发表评论

netbeans下��用ruby和rails

leekiang — Sat, 13 Feb 2010 10:34:00 GMT

在http://zh-cn.netbeans.org/kb/docs/ruby/rapid-ruby-weblog.html讲了如何一步一步创��Z��个最��单的应用。步骤如�?
1 在netbeans里徏一个rails��目,名�ؓrubyweblog
2 使用Scaffold生成post模型的全套文�?/font>.�?��目"�H�口�?code style="">rubyweblog

��目�?/code>右键 �Q�点�ȝ���?generate),在“Rails 生成器”对话框中，从“生成”下拉列表中选择 "scaffold",在“模型名�U�”文本框中键�?Post,在“属性对”文本框中键�?title:string �q�单几Z��确定”按钮�?br />  语法:script/generate scaffold ModelName [field:type field:type]
3 生成数据库和�?/font>
  在“项目”窗口中�Q�右键单�?rubyweblog ��目节点�Q�然后从弹出式菜单中选择“运�?调试 Rake ��d���?从“匹配�Q务”列表中选择 db:create �q�单几Z��完成�?�q�时会在mysql中生成开发库.�q�一步也可以手工�?也就相当�?font color="#0000ff">rake db:create
  在“项目”窗口中�Q�右键单�?rubyweblog 节点�q����择“迁�U�L��据库�?gt;“至当前版本�?�q�样会生成表�l�构�?br />4 修改"routes.rb" , 扑ֈ�# map.root :controller => "welcome" �q�一�?取消注释该行�q�将控制器更改�ؓ "posts"。删除public下的index.html�Q�Rails ���在 routes.rb 中寻��N��要显�C�的��面。然后就可以�q�行了�?br />5 向posts 表中��d��一�?code style="">body

字段
右键单击“数据库�q�移”节点，�q�从弹出菜单中选择“生成�?�q�将打开“Rails 生成器”对话框�Q�它已经在“生成”下拉列表中选择了迁�U?migration),当然也可以在��目上右�?gt;生成>migration�?br /> 在“参数”文本框中输�?AddBodyToPost body:text,其他默认�Q�单几Z��确定”�?font color="#ff0000">�q�个"AddBodyToPost"只是一个名字�?/font>
IDE会创��Z��个受版本控制的迁�U�脚本。该脚本的名�U�C��日期和时间开��_��q�以 add_body_to_post.rb �l�束。在��目上右键选择“迁�U�L��据库�?gt;“至当前版本”，或者在源文件中右键点击“运行文件”（�q�时要小心，可能会造成数据丢失�Q?br /> 修改new.html.erb、edit.html.erb和show.html.erb,增加与新字段相关的网��代码�?br />
生成��试库与生成开发库�c�M��Q�在“项目”窗口中�Q�右键单�?rubyweblog��目�Q�然后选择“运�?调试 Rake ��d��”，在“参数”文本框中键�?RAILS_ENV=test,扑ֈ��q�双�?db:create 条目�Q�以�q�行��d��Q�从而创�?rubyweblog_test 数据�?接着扑ֈ��q�双�?db:test:prepare 条目�?font color="#ff0000">我觉�?db:test:prepare 可以不执行，因�ؓ点击��目右键"��试"时会自动执行db:test:prepare和rake db:fixtures:load�?br />
http://cn.oiax.jp/rails/rails_step_by_step/rails_step1.html说了config/routes.rb末尾附近的以下两行可以删掉，试了果然如此
map.connect ':controller/:action/:id'
map.connect ':controller/:action/:id.:format'

http://zh-cn.netbeans.org/kb/docs/ruby/quickstart.html

leekiang 2010-02-13 18:34 发表评论

rake,gem

leekiang — Sat, 13 Feb 2010 10:32:00 GMT

1,
ruby之间的引用全部是源代码的引用�Q��ؓ了规范类库的��理�Q�gems出现了�?
gems是ruby源代码管理工��P��代码按照一定的目录�l�构被组�l�成一个lib�?br />详见http://www.javaeye.com/topic/320384
Gem是第三方Ruby库，netbeans提供了Ruby Gems��理器，可以用来��d��和维护gem,Tools > Ruby Gems�?br />rails和rake�{�都被rubygems��理�?br />

查看本机的gems: gem list --local
看看rubyforge.org上的gems: gem list --remote
删除某个版本的gem�Q�例如gem uninstall rails -v=2.3.4

有一本书�?lt;Ruby Gems开发实�?gt;

2,
Rake(http://rake.rubyforge.org)是一门构��a��Q�和make(www.gnu.org/software/make/)
ant(http://ant.apache.org)很相像。Rake是用Ruby写的�Q�它支持它自��q��DSL用来处理和维�?br /> Ruby应用�E�序。Rails用rake的扩展来完成多种不同的�Q�?
详见http://www.javaeye.com/topic/300375
rake教程:http://railsenvy.com/2007/6/11/ruby-on-rails-rake-tutorial
��译:http://hi.baidu.com/%D0%C7203/blog/item/ebda2dd09f1d698ea1ec9c7a.html

leekiang 2010-02-13 18:32 发表评论

netbeans�W�记

leekiang — Fri, 13 Feb 2009 17:17:00 GMT

1,快捷�?br /> 代码自动完成:Ctrl+反斜�U?br />

2,讄��
1)如果觉得NetBeans�~�省的工��h��按钮太大�Q�可以右键点��d��h��Q�从下拉菜单中选择Small Toolbar Icons
�q�可以选择"内存"�Q�会在工��h��昄��内存占用情况�?br /> 2)讄��字体:
Tools->Options->Fonts & Colors,在左边的�c�d��Category下选择�~�省(Default),再选择字体�Q�然后保存�?一定要选一个Category�Q�因为刚�q�来旉��认的�c�d��?�I�白"�Q�会��D��换了字体也不会生�?。可能中文会��q��,所以还要修改Comment,String�q�两个类别�?br />我的字体讄��
languages:all languages
Category:Default   Font:Courier New 13
Category:Comment   Font:Dialog 12
Category:String    Font:Dialog 12
3)控制台出��Cؕ�?br />在Netbeans的安装目录下的etc目录下有一个netbeans.conf�Q?font color="#000000">�?/font>netbeans_default_options引号内加�?/font>"-J-Dfile.encoding=UTF-8" ��可以了! 其它比如字体大小也可以在�q�里调整.�? --font-size:12��可以了!
-J-Duser.language=en -J-Duser.country=US 英文界面启动
4)erb文�g
# coding: utf-8

�?��目"�H�口中显�C�物理结�?默认是逻辑�l�构):
tools->Miscellaneous(其他)->ruby标签��?>取消"昄��逻辑��目视图"�Q�然后重启�?br />
3,
maven风格的项目结�?http://www.javaeye.com/topic/274136?page=5

4�Q�与eclipse�׃�n工程
http://tech.ddvip.com/2008-12/122916148599857.html
http://tech.ddvip.com/2008-12/122880588198603.html

5�Q�有��在linux下这栯��|�一下界面比较好看：
在netbeans 在安装目录下扑ֈ� etc/netbeans.conf 然后在netbeans_default_options ��d��参数
-J-Dswing.aatext=true --locale en:US
来源:http://www.tkk7.com/gml520/archive/2010/04/16/318507.html

leekiang 2009-02-14 01:17 发表评论

rails记录

leekiang — Tue, 02 Dec 2008 18:53:00 GMT

1,在以下的文章中找到bort�q�个rails应用
http://www.railsinside.com/elsewhere/100-7-barebones-rails-apps-to-kick-start-your-development-process.html
下蝲bort�Q�放到netbeans6.5中，讄��Z��目�Q�启动报错，�W�一�ơ报capistrano的错误，我在environment.rb中把那几个config.gem屏蔽了。接着又报 `load_missing_constant': uninitialized constant Authorization::AasmRoles::AASM (NameError) �Q�我照着http://rails_security.lighthouseapp.com/projects/15332/tickets/10-uninitialized-constant-authorization-aasmroles-aasm-nameerror�q�个链接里的做法
在application.rb的ApplicationController里加了一�?font color="#0000ff">require 'aasm'�Q?font color="#000000">然后��可以启动了。执行ruby db/migrate,重启后，首页能进�Q�但注册一个用��h��交后�?/font>

Called id for nil, which would mistakenly be 4 -- if you really

wanted the id of nil, use object_id

�q�个发生在app/views/users/new.html.erb
暂时��到�q�里了，以上大多不懂�Q�先作个记录�?br />
2�Q�这是一个基�?.2.2的例�?名叫starter
http://github.com/josevalim/starter/tree/master/app
可以在github里搜2.2.2�Q�或在code search里搜索RAILS_GEM_VERSION = '2.2.2'�Q�以��L��Z��2.2.2的例子�?br />http://github.com/brainopia/shop/tree/master
http://github.com/ccjr/play-eoj/tree/master
http://github.com/Radar/rboard/tree/master
http://github.com/rbarazi/simple_blog/tree/master
http://github.com/csiszarattila/webshop/tree/master
http://github.com/bushymark/depot/tree/master

�q�行starter,却报
Missing these required gems:
win32console
ruby-debug
ruby-prof
然后
starter>rake gems:install
(in c:/starter)
rake aborted!
no such file to load -- spec/rake/spectask
C: /starter/rakefile:10
(See full trace by running task with --trace)

leekiang 2008-12-03 02:53 发表评论

leekiang — Sun, 30 Nov 2008 18:30:00 GMT

1,博客,cms�c?br /> Mephisto 已升�?.2.2�Q?/em>
typo 已升�U�至2.3.5
radiantcms 内容��理
rubricks
refinerycms
locomative
simplelog:http://simplelog.net
1stlog是一个针对中国用户开发的��Z��RubyOnRails的Blog�pȝ��
http://www.h3rald.com/articles/rails-os-killer-apps
2�Q�项目管�?br />   Redmine 2.3.5
   retrospectiva http://retrospectiva.org/ 2.3.5
   Teambox
   Clocking IT 功能更�ؓ强大
3�Q�论�?br /> beast�Q�rforum
beast攚w��版:http://code.google.com/p/savage-beast-2/
              http://github.com/courtenay/altered_beast
rboard:https://github.com/radar/rboard
4,SNS
https://github.com/insoshi/insoshi
https://github.com/stevenbristol/lovd-by-less�Q�demo见http://try.lovdbyless.com/
https://github.com/bborn/communityengine 见http://communityengine.org/
https://github.com/timothyf/EngineY
�?br />《Practical Rails Social Networking Sites�?br />《RailsSpace: Building a Social Networking Website with Ruby on Rails�?br />
5�Q�进销�?br />http://hamster.rubyforge.org/index.htm
Spree http://spreehq.org/ 已升�U�至2.3.5
gal http://gal.railsplayground.com/
     http://sourceforge.net/projects/gal
     https://gal.svn.sourceforge.net/svnroot/gal/trunk/
http://www.javaeye.com/news/5718-23-best-open-source-ruby-on-rails-application
6,substruct
http://code.google.com/p/substruct/

tracks 个�h旉��理? http://www.getontracks.org 2.2.2

6 CRM,erp
fat_free_crm http://www.fatfreecrm.com/ 目前��Z��2.3.4,��g��没有单元��试
extrails
http://sourceforge.net/projects/extrails/
http://code.google.com/p/pa-manager/
官网为http://www.ev-manager.com

文档��理
http://github.com/bruparel/file_manager

邮�g
mailr

�C�会化网�l?br />Community Engine http://communityengine.org/
onebody   insoshi
openmind
http://www.blog.railshouse.com/2009/04/17/Top-Open-Source-Ruby-On-Rails-Projects

7�Q?/em>Rools is a pure Ruby rules-engine.
8�Q�openWFEru is an open source Ruby workflow and BPM engine。又�?em>Ruote
9�Q�Spreadsheet can read, write and modify Spreadsheet Documents
10�Q?/em>sequel
http://www.infoq.com/cn/news/2008/12/sequel-ruby-db-toolkit
11�Q�Rails Metal是一个围�l�一般Rack中间件的��装wrapper�Q�能够放在Rails��h��的前面�ƈ使用Rails的session。Metal的出现给让Rails应用的运行速度极大加快�Q��ƈ且能够每�U�钟同时处理成千上万的应�?br />
12,rubycas-server 单点��d��
   http://chinaonrails.com/topic/view/1610.html
http://code.google.com/p/rorjossoagent/   destinyd.war@gmail.com

13,说到工作��引�?/a>�Q�ruby的state machine非常不错�Q�在功能/开发效�?可扩展性等斚w��Q�没有�Q何一个开源的java工作��引擎可以和它媲��：
http://github.com/pluginaweek/state_machine/tree/master
http://www.javaeye.com/topic/362207

http://www.tkk7.com/cap/archive/2005/07/17/7895.html
Graphviz的主��在http://www.graphviz.org/ �Q?他是AT&T Labs-Research开发的囑�Ş�l�制工具, 他可以很方便的用来绘制结构化的图形网�l�，支持多种格式输出�Q?生成囄��的质量和速度都不�?br />
acts_state_machine

14,Bort
A base rails app featuring: RESTful Authentication, Will Paginate, Rspec & Rspec-rails, Exception Notifier, Asset Packager, Cap Recipe (multi-stage).
15 sinatra 微型web框架
16 pony 发邮�?br />17 rest-client代替ActiveResource
18 报表 ruport   rails21-book   Prawn   ActvieFPDF
   HowtoGeneratePDFs
   http://wiki.rubyonrails.org/rails/pages/HowtoIntegrateJasperReports
19 Radiant�Q�一个顶��的��Z��Rails的CMS
20 Mongrel
   http://chinaonrails.com/topic/view/206.html
   Mongrel 是一个ruby的webserver和类�? Mongrel的特色就是快�Q�它比ruby自带的web server�q�有其他的webserver都要快。把�E�序部��v到这个上面是会给你带来速度上的惊喜的�? 另外你也可以在ruby�E�序中直接��用mongrel�Q�开发属于自�׃��用的web server。mongrel的安装超�U�简单，别忘了他是用rubygems打包的，一个命令完全搞定�?gem install mongrel
在我们介�l�的五个武器总mongrel是唯一的一个类库。他是开放源代码的。他是一个很好的教我们如何把自己的��品打包，市场化。当然他最吸引的就是他的作者从中教�l�我们如何写一个类库�?

21 InstantRails�Q�一个All In One的套�Ӟ��可以帮助你快速搭建Ruby On Rails开发环�?br />
22 Adhearsion is a new way to write voice-enabled applications. It's not just an API or library �?it's a fully-featured framework, the first of its kind, designed for maximal code reuse and intuitiveness. The name "Adhearsion" is a combination of "adhesion" and "hear" because Adhearsion shines best when integrating technologies with voice.

23 http://www.h3rald.com/articles/rails-os-killer-apps

24 Shoes只是玩具�Q�要用Ruby�q�行快速GUI开发，��L��wxRuby+wxSugar
   http://quake.javaeye.com/blog/295829

25 权限插�g
http://github.com/binarylogic/authlogic/tree/master

26 查询
http://www.javaeye.com/topic/585348
http://book.csdn.net/bookfiles/879/10087927419.shtml
http://www.javaeye.com/topic/241343 Searchgasm searchlogic
Where插�g ostruct
simple_column_search http://doruby.kbmj.com/tn_on_rails/20100120/

27,

28,Camping��自己定义�ؓ个代码量保持�?k字节大小以下Web开发框架这个项目已创徏�?2个月�q�由 whytheluckystf�l�护个完整web应用可以在单文�g中定义同旉��循MVC框架(�q��得web应用以后更易于移�?�?font color="#c60a00">Rails的上)Camping使用ActiveRecord作�ؓORM解决�Ҏ��

29,nokogiri 解析xml�Q�用法类��g��jquery

30�Q�mini_magick处理囄��

31,rcov
是��你的�E�序不经常崩溃的理由之一�?它分析你的代码，高亮昄��你的��试代码遗漏的部分�?它速度快，不占资源�Q?�q�且能减��d��?�Q?

32,hpricot 是一个快速、容易上手的 HTML 分析器�?如果你发现自己需要解�?HTML 抑或 XML 的内容， hpricot 是最��L��Ҏ��之一

33,Capistrano �?Rails 应用�E�序开发更加从宏V�?它还是一个用来和�q�程服务器交互的聪明�?framework �?事实上我已经备䆾了用 Capistrano 写的代码�Q?作�ؓ Rake/Net::SSH 或�?shell 代码之外的另一个选择�?br />
34,Turn 使你�?Test::Unit 输出更易诅R�?Turn 也行看�v来不那么招�h喜欢�Q?但它��实寚w��L��试结果有很大帮助�?在维�?Helicoid 的时候我�Ҏ��试严重依赖，所以�Q何能使这��工作变得更��z�的东西我都乐于��试。要安装 turn�Q?使用 gem install turn 命��o�?br />
35, scruffy和Gruff可用来��生图�?br />
36, rubyscript2exe和Exerb可以�~�译为exe文�g,后者生成的文�g��，如果后者生成的�q�行不了可以试前者�?br />
37�Q?JRails��是用jQuery替代Prototype/script.aculo.us在Rails�?helpers实现javascript的功�?br />     http://kyoleelqh.javaeye.com/blog/250514

38,GNMS是一个网�l�管理系�l�，囑�Ş化工��P��用于监测�|�络元素的状�?br />39�Q�Plugin to kill N+1 queries
    http://github.com/flyerhzm/bullet   destinyd_ror@163.com

http://www.opensourcerails.com

http://www.infoq.com/cn/articles/changing-the-present-case-stud
http://www.roredu.com/rubyrails/category/ruby-on-rails-item/
http://www.javaeye.com/news/1993
http://hqmank.blog.bokee.net/bloggermodule/blog_viewblog.do?id=532562
http://www.opensourcerails.com/
http://www.practicalecommerce.com/blogs/post/432-Multiple-Attachments-in-Rails

leekiang 2008-12-01 02:30 发表评论

rails�W�记

leekiang — Sat, 29 Nov 2008 22:11:00 GMT
1,db:migrate �Ӟ��Table already exist 的解军_��?br /> 在已存在的表的create_table的参��C��Q�加�?:force => true�Q�如下：
create_table :products, :force => true do |t|
2�Q�验�?br />http://www.36sign.com/blog/working/ror-validation-problem.html
http://cvu.javaeye.com/blog/78066
3�Q�分��?br />will_paginate
下蝲:http://github.com/mislav/will_paginate/wikis/installation
http://hideto.javaeye.com/blog/108118
http://trace.javaeye.com/blog/156736
http://www.cnblogs.com/ayuan/archive/2008/03/12/1102001.html
http://www.ruby-lang.org.cn/forums/thread-985-1-1.html
http://hi.baidu.com/%D0%C7203/blog/item/30f334ecd0a319d72e2e212c.html

leekiang 2008-11-30 06:11 发表评论

用几句ruby代码刷�h�?�?

leekiang — Sat, 05 Apr 2008 05:04:00 GMT

require ' net/http '

count = 1 .. 100000    # define an array

count.each{       # each
| index |               # element is index  1 2 3 4 5 6
printf " #{index} " # print index and space
h = Net::HTTP.new( ' space.cnblogs.com ' , 80 ) # create a object
resp, data = h.get( ' /group/topic/1605/ ' ,nil) # get
if resp.code != " 200 " # if http response status code not is 200
  puts resp.code     # put status code
  puts resp.message # put status message

  resp.each{     # put headers
   | key, val |
  puts " #{key}\t\t\t#{val} "
  }

  p data     # put html
   break # break the eache
end
# sleep(1) #sleep  use second do inteval
}

来源:http://www.cnblogs.com/coderlee/archive/2008/03/25/1121652.html

leekiang 2008-04-05 13:04 发表评论

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rmagick

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