【发布时间】：2012-02-27 14:07:49
【问题描述】：
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 中我得到：
>> 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，但这只是一个猜测。我的 ruby 版本/安装位置是：
/usr/local/bin/ruby 和 ruby 1.9.3p0
然而，ruby gems 在/usr/local/lib/ruby/1.9.1 中，它正在谈论版本1.9.1。会不会是这个原因？
谢谢！
更新 奇怪的是，当我在 IRB 中输入“puts 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!
>>
【问题讨论】：
-
如果你只是
require 'st'呢？ -
Why isn't current directory on my Ruby path? 的可能重复项；请参阅我在该问题中的回答以了解解决方法。