rails rake problems: uninitialized constant Rake::DSL

yiyanwan77

原来安装railsInstaler，里面ruby版本为1.8.7,rake版本为0.8.7,rails为3.0.6，一切正常
 
之后升级环境到ruby1.9.2-p180，创建完工程，运行bundle install命令，自动将rake升级到0.9.0，运行创建数据库命令:rake db:create --tace 出错
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D:\mylog>rake db:create --trace
(in D:/mylog)
rake aborted!
uninitialized constant Rake::DSL
C:/Ruby192/lib/ruby/1.9.1/rake.rb:2482:in `const_missing'
D:/mylog/Rakefile:9:in `<class:Application>'
D:/mylog/Rakefile:8:in `<module:Mylog>'
D:/mylog/Rakefile:7:in `<top (required)>'
C:/Ruby192/lib/ruby/1.9.1/rake.rb:2373:in `load'
C:/Ruby192/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile'
C:/Ruby192/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
C:/Ruby192/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling'
C:/Ruby192/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile'
C:/Ruby192/lib/ruby/1.9.1/rake.rb:1991:in `run'
C:/Ruby192/bin/rake:31:in `<main>'
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google了各种说法后，确定是rake 0.9.0的问题，基本有两种解决方案，但都不好使：
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方法一：回退到rake0.8.7
在gemFile中加入：gem 'rake', '0.8.7'
然后运行:bundle update rake
提示using rake 0.8.7
命令正常了，但是创建数据库失败[数据库创建成功，但中途异常终止]
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方法二:在rakeFild中添加如下代码:

module ::YourApplicationName  class Application    include Rake::DSL  endendmodule ::RakeFileUtils  extend Rake::FileUtilsExtend