bernieyoo

Rails中运行时修改了表结构,如何同步刷新属性?

bernieyoo — Thu, 06 Mar 2008 16:28:15 +0800

作者: bernieyoo 链接：http://bernieyoo.javaeye.com/blog/168819 发表时间: 2008年03月06日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

如题.
例如,我在Rails程序运行时,给一个表t1s添加了一列f1,但此时再调用相应的model:T1时,提示没有t1.f1这个属性.

应该如何刷新T1这个model,使之可以使用t1.f1呢?

谢谢!

已有 2 人发表留言，猛击->>这里<<-参与讨论

JavaEye推荐

求助：We're sorry, but something went wrong.

bernieyoo — Mon, 20 Aug 2007 23:21:25 +0800

作者: bernieyoo 链接：http://bernieyoo.javaeye.com/blog/114464 发表时间: 2007年08月20日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

我是ROR新手，在使用的过程中突然遇到了We're sorry, but something went wrong.的错误。
重启机器后就不再有这个错误，但只要停掉了WEB Server,再次启动后，打开任一页面都会出现这个错误：

Status: 500 Internal Server Error Content-Type: text/html
We're sorry, but something went wrong.

We've been notified about this issue and we'll take a look at it shortly.

日志内容如下：

Session contains objects whose class definition isn't available.
Remember to require the classes for all objects kept in the session.
(Original exception: uninitialized constant Module::TTree [NameError])


C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/cgi_process.rb:161:in `stale_session_check!'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/cgi_process.rb:110:in `session'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1052:in `assign_shortcuts_without_flash'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/flash.rb:140:in `assign_shortcuts'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:424:in `process_without_filters'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:624:in `process_without_session_management_support'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:in `process'

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:330:in `process'

C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in `dispatch'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/rails.rb:78:in `process'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/rails.rb:76:in `synchronize'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/rails.rb:76:in `process'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:618:in `process_client'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:617:in `each'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:617:in `process_client'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:736:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:736:in `initialize'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:736:in `new'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:736:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:720:in `initialize'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:720:in `new'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel.rb:720:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/configurator.rb:271:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/configurator.rb:270:in `each'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/configurator.rb:270:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/bin/mongrel_rails:127:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/lib/mongrel/command.rb:211:in `run'

C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-mswin32/bin/mongrel_rails:243

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:488:in `load'

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:488:in `load'

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:342:in `new_constants_in'

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:488:in `load'

C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/mongrel.rb:60

C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'

C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in `require'

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:342:in `new_constants_in'

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in `require'

C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39

C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'

C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'

script/server:3

希望能得到各位大侠的帮助。

已有 4 人发表留言，猛击->>这里<<-参与讨论

JavaEye推荐

求助！连接SQL Server出错

bernieyoo — Wed, 20 Jun 2007 17:05:35 +0800

作者: bernieyoo 链接：http://bernieyoo.javaeye.com/blog/92454 发表时间: 2007年06月20日

声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！

我按《应用Rails进行敏捷WEB开发》中depot的开发步骤操作，由于我机器上已经安装了SQLServer，就没有用MYSQL。按照网上找到的资料进行了设置，可是在连接SQL Server数据库时却出现了错误。
错误内容如下：

C:/ruby/lib/ruby/1.8/yaml.rb:133:in `load': syntax error on line 2, col 0: `database:depot_development' (ArgumentError)

        from C:/ruby/lib/ruby/1.8/yaml.rb:133:in `load'

        from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/initializer.rb:523:in `database_configuration'

        from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/initializer.rb:228:in `initialize_database'

        from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/initializer.rb:88:in `process'

        from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/initializer.rb:43:in `send'

        from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/initializer.rb:43:in `run'

        from ./script/../config/../config/environment.rb:14

        from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'

        from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'

        from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/generate.rb:1

        from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'

        from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'

        from script/generate:3

我的开发环境如下：
Windows XP SP2
NetBeans Ruby IDE 070620
Ruby 1.8.6
Rails 1.2.3
SQL Server 2000 SP4

我按网上资料下载了Ruby-DBI最新的0.1.1,将其下的lib\dbd\ADO.rb复制到C:\ruby\lib\ruby\site_ruby\1.8\DBD\ADO下，在environment.rb中添加了

require 'win32ole' 
WIN32OLE.codepage = WIN32OLE::CP_UTF8

database.yml内容如下：

development:
adapter:sqlserver
database:depot_development
host:127.0.0.1
username:sa
password:sa

test:
adapter:sqlserver
database:depot_development
host:127.0.0.1
username:sa
password:sa

production:
adapter:sqlserver
database:depot_development
host:127.0.0.1
username:sa
password:sa

连接数据库时报了上面的错误。
我是刚重装了Windows和ROR，重装之前是可以连上的。

希望能得到高手的指点，谢谢！

已有 2 人发表留言，猛击->>这里<<-参与讨论

JavaEye推荐