生成一个backgroundrb worker时出错

$ script/generate worker use

 

报如下错误：

 

/usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- packet (MissingSourceFile)
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:354:in `new_constants_in'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
    from /media/disk/software/ework/ruby/bookShare/vendor/plugins/backgroundrb/lib/backgroundrb.rb:4
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:354:in `new_constants_in'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
    from /media/disk/software/ework/ruby/bookShare/vendor/plugins/backgroundrb/init.rb:6:in `evaluate_init_rb'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/rails/plugin.rb:95:in `evaluate_init_rb'
    from /var/lib/gems/1.8/gems/activesupport-2.1.0/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/rails/plugin.rb:91:in `evaluate_init_rb'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/rails/plugin.rb:44:in `load'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/rails/plugin/loader.rb:33:in `load_plugins'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/rails/plugin/loader.rb:32:in `each'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/rails/plugin/loader.rb:32:in `load_plugins'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:283:in `load_plugins'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:138:in `process'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:93:in `send'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:93:in `run'
    from /media/disk/software/ework/ruby/bookShare/config/environment.rb:13
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from /var/lib/gems/1.8/gems/rails-2.1.0/lib/commands/generate.rb:1
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from script/generate:3

 

 

解决方法：

执行以下命令就行了：

 sudo gem install chronic

 sudo gem install chronic