require file use dirname(FILE) or just requre filename?

Posted by user285020 on Stack Overflow See other posts from Stack Overflow or by user285020
Published on 2010-05-28T07:41:06Z Indexed on 2010/05/28 7:51 UTC
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ruby

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rails

I have a file at lib directory in my rails project. like this a (directory) a1 a2 a.rb

when I in a.rb require a1.

require 'a/a1'

it will warn me /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- a/a1 (MissingSourceFile)

but use dirname(FILE), it work.

require File.dirname(__FILE__) + '/a/a1

why?

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