rails 学习

最近刚接触ruby和rails，留个笔记，记录碰到的问题（不定时更新）

资源 http://rubyforge.org/


问题使用rails2.3.4版本生成的工程，创建controller 无法被识别，于是升级rails为3.0试试，在升级中碰到问题，如下
环境ruby1.9.2p180. (on windows) gem1.7.1
1、
D:\mysql-5.0.18-win32\bin>gem install rails --version 3.0.0
Fetching: activesupport-3.0.0.gem (100%)
ERROR:  While executing gem ... (Gem::FormatException)
    builder-2.1.2 has an invalid value for @cert_chain

此问题是gem1.7.1的bug，网上建议使用1.6.2
>gem update --system 1.6.2

再次安装
D:\mysql-5.0.18-win32\bin>gem install rails --version 3.0.0
Fetching: i18n-0.4.2.gem (100%)
Fetching: activemodel-3.0.0.gem (100%)
Fetching: rack-1.2.2.gem (100%)
Fetching: rack-test-0.5.7.gem (100%)
Fetching: rack-mount-0.6.14.gem (100%)
Fetching: tzinfo-0.3.26.gem (100%)
Fetching: abstract-1.0.0.gem (100%)
Fetching: erubis-2.6.6.gem (100%)
Fetching: actionpack-3.0.0.gem (100%)
Fetching: arel-1.0.1.gem (100%)
Fetching: activerecord-3.0.0.gem (100%)
Fetching: activeresource-3.0.0.gem (100%)
Fetching: mime-types-1.16.gem (100%)
Fetching: polyglot-0.3.1.gem (100%)
Fetching: treetop-1.4.9.gem (100%)
Fetching: mail-2.2.15.gem (100%)
Fetching: actionmailer-3.0.0.gem (100%)
Fetching: thor-0.14.6.gem (100%)
Fetching: railties-3.0.0.gem (100%)
Fetching: bundler-1.0.11.gem (100%)
Fetching: rails-3.0.0.gem (100%)
Successfully installed builder-2.1.2
Successfully installed i18n-0.4.2
Successfully installed activemodel-3.0.0
Successfully installed rack-1.2.2
Successfully installed rack-test-0.5.7
Successfully installed rack-mount-0.6.14
Successfully installed tzinfo-0.3.26
Successfully installed abstract-1.0.0
Successfully installed erubis-2.6.6
Successfully installed actionpack-3.0.0
Successfully installed arel-1.0.1
Successfully installed activerecord-3.0.0
Successfully installed activeresource-3.0.0
Successfully installed mime-types-1.16
Successfully installed polyglot-0.3.1
Successfully installed treetop-1.4.9
Successfully installed mail-2.2.15
Successfully installed actionmailer-3.0.0
Successfully installed thor-0.14.6
Successfully installed railties-3.0.0
Successfully installed bundler-1.0.11
Successfully installed rails-3.0.0
22 gems installed
Installing ri documentation for builder-2.1.2...
Installing ri documentation for i18n-0.4.2...
Installing ri documentation for activemodel-3.0.0...
Installing ri documentation for rack-1.2.2...
Installing ri documentation for rack-test-0.5.7...
Installing ri documentation for rack-mount-0.6.14...
Installing ri documentation for tzinfo-0.3.26...
Installing ri documentation for abstract-1.0.0...
Installing ri documentation for erubis-2.6.6...
Installing ri documentation for actionpack-3.0.0...
Installing ri documentation for arel-1.0.1...
Installing ri documentation for activerecord-3.0.0...
Installing ri documentation for activeresource-3.0.0...
Installing ri documentation for mime-types-1.16...
Installing ri documentation for polyglot-0.3.1...
Installing ri documentation for treetop-1.4.9...
Installing ri documentation for mail-2.2.15...
Installing ri documentation for actionmailer-3.0.0...
Installing ri documentation for thor-0.14.6...
Installing ri documentation for railties-3.0.0...
Installing ri documentation for bundler-1.0.11...
Installing ri documentation for rails-3.0.0...
Installing RDoc documentation for builder-2.1.2...
Installing RDoc documentation for i18n-0.4.2...
Installing RDoc documentation for activemodel-3.0.0...
Installing RDoc documentation for rack-1.2.2...
Installing RDoc documentation for rack-test-0.5.7...
Installing RDoc documentation for rack-mount-0.6.14...
Installing RDoc documentation for tzinfo-0.3.26...
Installing RDoc documentation for abstract-1.0.0...
Installing RDoc documentation for erubis-2.6.6...
Installing RDoc documentation for actionpack-3.0.0...
Installing RDoc documentation for arel-1.0.1...
Installing RDoc documentation for activerecord-3.0.0...
Installing RDoc documentation for activeresource-3.0.0...
Installing RDoc documentation for mime-types-1.16...
Installing RDoc documentation for polyglot-0.3.1...
Installing RDoc documentation for treetop-1.4.9...
Installing RDoc documentation for mail-2.2.15...
Installing RDoc documentation for actionmailer-3.0.0...
Installing RDoc documentation for thor-0.14.6...
Installing RDoc documentation for railties-3.0.0...
Installing RDoc documentation for bundler-1.0.11...
Installing RDoc documentation for rails-3.0.0...

安装成功


2、卸载老版本模块的方法
D:\Ruby192\tmp\mybook>gem uninstall actionmailer -v 2.2.3
Successfully uninstalled actionmailer-2.2.3


3、创建工程后rails server启动web服务
提示
找不到sqllite.dll 或
无法定位程序输入点 sqlite3_backup_finish 于动态链接库 sqlite3.dll
需下载到http://www.sqlite.org/download.html下在 放到ruby安装目录bin下


4、生成工程后浏览
Routing Error

No route matches "/MyTest/hello"
修改工程config\routes.rb文件
match ':controller(/:action(/:id(.:format)))' 此行注释去掉，又出现下一个问题见5

5、编写例子，浏览时报
undefined method `render_text'
原因rails的新版本不用render_text了，改为render:text=>"hello world"就可以了（参考了http://qyongkang.iteye.com/blog/404604）