ruby LoadError：无法加载这样的文件 [英] ruby LoadError: cannot load such file

问题描述

当我需要一个文件时，例如（叫做st.rb）：

pre $ require'rubygems'
需要'mongrel'

class TestHandler< Mongrel :: HttpHandler

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

end
end

结束


在irb中我得到：

 >>需要'st.rb'
 LoadError：无法加载这样的文件 -  /usr/local/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in`require中的st.rb 
 '从/usr/local/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in'require'
 from（irb）：3 $ b $ from / usr / local / bin / irb：12：在< main>'
  

我可能有线索，但这只是一个猜测。我的ruby版本/安装位置是：
$ b / usr / local / bin / ruby​​ 和 ruby​​ 1.9.3p0

但是，ruby gems位于 /usr/local/lib/ruby/1.9中。 1 ，它正在讨论版本 1.9.1 。这可能是原因吗？

谢谢！

更新
奇怪的是，当我在IRB中键入'RUBY_VERSION'时，我得到这个：

  puts RUBY_VERSION 
 1.9.3 
 NoMethodError：未定义的方法'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水平）来自/usr/local/lib/ruby/1.9.1的/usr/local/lib/ruby/1.9.1/irb.rb:273:in`signal_status'
的eval_input'
 /irb.rb:156:in`在eval_input中阻止'
从/usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:243:in`block（2级）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`在each_top_level_statement中阻止'$ / $ / b / from /usr/local/lib/ruby/1.9.1/irb/ruby- lex.rb：228：在`catch'中
从/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：在`eval_input'
 /usr/local/lib/ruby/1.9.1/irb.rb:70:in`block in start' $ / b / b from /usr/local/lib/ruby/1.9.1/irb.rb:69:in`catch'
 from /usr/local/lib/ruby/1.9.1/irb.rb： 69：在`开始'
从/ usr / local / bin / irb：12：在< main>'
可能IRB错误！ 
>> 
  

解决方案

st所在的目录。 rb lives很可能不在您的加载路径中。

假设 st.rb 位于相对于您调用 irb 的目录中，名为 lib 的目录中，您可以添加 lib 目录添加到ruby用来加载类或模块的目录列表中：

  $：<< 'lib'
  

例如，为了调用名为'foobar'的模块（foobar.rb）它位于 lib 目录中，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中：

  IRB（主）：001：0>需要 'foobar的' 
 LoadError：没有这样的文件来加载 - 从/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require 
 foobar的
 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中/红宝石/ site_ruby， /usr/lib/ruby/vendor_ruby/1.8 /usr/lib/ruby/vendor_ruby/1.8/i386-cygwin， / usr / lib中/红宝石/ 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中/红宝石/ 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>需要'foobar'
 => true 
  

编辑
对不起，我完全错过了你使用的是Ruby 1.9.x.所有帐户均报告您的出于安全原因，当前工作目录已从 LOAD_PATH 中删除​​，因此您必须执行类似于 irb

  $：<<  
  

When I require a file, for example (called 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

in irb I get:

>> 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>'

I might have a clue, but it's just a guess. My ruby version/install location is:

/usr/local/bin/ruby and ruby 1.9.3p0

yet, ruby gems is in /usr/local/lib/ruby/1.9.1 and it's talking about version 1.9.1. Could this possibly be the reason?

Thanks!

UPDATE Weird, when I type 'puts RUBY_VERSION' in IRB, I get this:

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!
>> 

解决方案

The directory where st.rb lives is most likely not on your load path.

Assuming that st.rb is located in a directory called lib relative to where you invoke irb, you can add that lib directory to the list of directories that ruby uses to load classes or modules with this:

$: << 'lib'

For example, in order to call the module called 'foobar' (foobar.rb) that lives in the lib directory, I would need to first add the lib directory to the list of load path. Here, I am just appending the lib directory to my load path:

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

EDIT Sorry, I completely missed the fact that you are using ruby 1.9.x. All accounts report that your current working directory has been removed from LOAD_PATH for security reasons, so you will have to do something like in irb:

$: << "."

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