ruby LoadError:无法加载此类文件

Question

当我需要一个文件时,例如(称为st.rb):

require 'rubygems'
require 'mongrel'

class TestHandler < Mongrel::HttpHandler

  def process(request, response)
    response.start(200) do |head, out|
      head["Content-Type"] = "text/html"
      out.write "Hello, World!\n"
    end
  end

end

在irb我得到:

>> require 'st.rb'
LoadError: cannot load such file -- st.rb
    from /usr/local/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /usr/local/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from (irb):3
    from /usr/local/bin/irb:12:in `<main>'

我可能有一个线索,但这只是猜测.我的ruby版本/安装位置是:

/usr/local/bin/ruby 和 ruby 1.9.3p0

然而,红宝石宝石在/usr/local/lib/ruby/1.9.1,它在谈论版本1.9.1.这可能是原因吗？

谢谢!

更新很 奇怪,当我在IRB中键入'put RUBY_VERSION'时,我得到了这个:

puts RUBY_VERSION
1.9.3
NoMethodError: undefined method `write' for nil:NilClass
    from /usr/local/lib/ruby/1.9.1/irb.rb:311:in `printf'
    from /usr/local/lib/ruby/1.9.1/irb.rb:311:in `output_value'
    from /usr/local/lib/ruby/1.9.1/irb.rb:160:in `block (2 levels) in eval_input'
    from /usr/local/lib/ruby/1.9.1/irb.rb:273:in `signal_status'
    from /usr/local/lib/ruby/1.9.1/irb.rb:156:in `block in eval_input'
    from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:243:in `block (2 levels) in each_top_level_statement'
    from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `loop'
    from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `block in each_top_level_statement'
    from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:228:in `catch'
    from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:228:in `each_top_level_statement'
    from /usr/local/lib/ruby/1.9.1/irb.rb:155:in `eval_input'
    from /usr/local/lib/ruby/1.9.1/irb.rb:70:in `block in start'
    from /usr/local/lib/ruby/1.9.1/irb.rb:69:in `catch'
    from /usr/local/lib/ruby/1.9.1/irb.rb:69:in `start'
    from /usr/local/bin/irb:12:in `<main>'
Maybe IRB bug!
>> 

Answer 1

st.rb生命很可能不在您的加载路径上的目录.

假设它st.rb位于一个名为lib相对于您调用的目录的目录中irb,您可以将该lib目录添加到ruby用于加载类或模块的目录列表中:

$: << 'lib'

例如,为了调用位于目录中的名为"foobar"(foobar.rb)的模块lib,我需要先将lib目录添加到加载路径列表中.在这里,我只是将lib目录附加到我的加载路径:

irb(main):001:0> require 'foobar'
LoadError: no such file to load -- foobar
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
        from (irb):1
irb(main):002:0> $:
=> ["/usr/lib/ruby/gems/1.8/gems/spoon-0.0.1/lib", "/usr/lib/ruby/gems/1.8/gems/interactive_editor-0.0.10/lib", "/usr/lib/ruby/site_ruby/1.8", "/usr/lib/ruby/site_ruby/1.8/i386-cygwin", "/usr/lib/ruby/site_ruby", "/usr/lib/ruby/vendor_ruby/1.8", "/usr/lib/ruby/vendor_ruby/1.8/i386-cygwin", "/usr/lib/ruby/vendor_ruby", "/usr/lib/ruby/1.8", "/usr/lib/ruby/1.8/i386-cygwin", "."]
irb(main):004:0> $: << 'lib'
=> ["/usr/lib/ruby/gems/1.8/gems/spoon-0.0.1/lib", "/usr/lib/ruby/gems/1.8/gems/interactive_editor-0.0.10/lib", "/usr/lib/ruby/site_ruby/1.8", "/usr/lib/ruby/site_ruby/1.8/i386-cygwin", "/usr/lib/ruby/site_ruby", "/usr/lib/ruby/vendor_ruby/1.8", "/usr/lib/ruby/vendor_ruby/1.8/i386-cygwin", "/usr/lib/ruby/vendor_ruby", "/usr/lib/ruby/1.8", "/usr/lib/ruby/1.8/i386-cygwin", ".", "lib"]
irb(main):005:0> require 'foobar'
=> true

编辑 对不起,我完全错过了你使用ruby 1.9.x的事实.所有帐户都会报告您出于安全原因已删除当前的工作目录LOAD_PATH,因此您必须执行以下操作irb:

$: << "."

Answer 2

出于安全性和其他原因,默认情况下ruby不包含load_path中的当前目录.您可能需要查看此内容以获取更多详细信息 - 为什么Ruby 1.9.2会删除"." 来自LOAD_PATH,有什么替代方案？

Answer 3

如果指定路径,问题就解决了.

例如

"require'st.rb'" - >"require'./st.rb'"

看看你的问题是否得到解决.