Question

在启动先前运行的rails应用程序rails server时出现以下错误。

/home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.5/lib/action_dispatch.rb:35:in `require': cannot load such file -- rack (LoadEr
ror)
        from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.5/lib/action_dispatch.rb:35:in `<top (required)>'
        from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands/server.rb:3:in `require'
        from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands/server.rb:3:in `<top (required)>'
        from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands.rb:49:in `require'
        from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands.rb:49:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

如何删除此错误。帮助我。

Answer 1

首先，您使用的服务也很重要。

打开命令窗口并输入：

irb --simple-prompt
>> require 'rack'
=> true
>>

如果没有机架，您将收到如下错误：

LoadError: no such file to load -- rack

您可以通过打开新的命令窗口并键入：

来安装机架

gem install rack

同时检查，您是否尝试运行命令

rails s

来自您的应用程序文件夹？

Rails服务器未启动

1 个答案: