当我运行Rails应用程序时,它会正确找到我已安装的所有宝石。
这是我第一次尝试从irb内部调用一些宝石而无法找到它们。
blocke:~$ irb
irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'rails'
LoadError: no such file to load -- rails
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from (irb):2
irb(main):003:0>
当我运行“宝石环境”时,这就是我得到的:
blocke:~$ gem environment
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.5
- RUBY VERSION: 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]
- INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8
- RUBY EXECUTABLE: /usr/bin/ruby1.8
- EXECUTABLE DIRECTORY: /usr/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86-linux
- GEM PATHS:
- /usr/lib/ruby/gems/1.8
- /home/blocke/.gem/ruby/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- "gem" => "--no-ri --no-rdoc"
- :sources => ["http://gemcutter.org", "http://gems.rubyforge.org/", "http://gems.github.com"]
- REMOTE SOURCES:
- http://gemcutter.org
- http://gems.rubyforge.org/
- http://gems.github.com
根据irb,gem路径是相同的,除了相反的顺序:
blocke:~$ irb
irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> Gem.path
=> ["/home/blocke/.gem/ruby/1.8", "/usr/lib/ruby/gems/1.8"]
答案 0 :(得分:14)
它不起作用,因为它找不到'rails.rb'文件(我认为rails gem中没有这样的文件)。
您可以要求特定的rails组件,例如'activerecord':
require 'rubygems'
require 'activerecord'
或使用'gem'命令,如下所示:
require 'rubygems'
gem 'rails'