rails rake problems: uninitialized constant Rake::DSL
阅读更多原来安装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bundleinstall命令,自动将rake升级到0.9.0,运行创建数据库命令:rakedb:create--tace出错_________________________________________