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我是rails新手，在练习教程时遇到以下错误。任何想法..无法使用rake销毁数据库
$ rake destroy scaffold Microposts --trace
rake aborted!
Don't know how to build task 'destroy'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/task_manager.rb:49:in `[]'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:115:in `invoke_task'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/home/keval/.rvm/gems/[email protected]/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/home/keval/.rvm/gems/[email protected]/bin/rake:19:in `load'
/home/keval/.rvm/gems/[email protected]/bin/rake:19:in `<main>'
thnks，只是使用了错误的命令！ –