在找不到IRB宝石:“NameError:从(IRB)未初始化的常量宝石”
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18-09-2019 - |
题
当我运行一个Rails应用程序发现我的所有安装的宝石的正确。
这是我第一次尝试从里面IRB调用一些宝石,它无法找到他们。
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”这是我所得到的:
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,宝石路径是除了以相反的顺序是相同的:
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"]
解决方案
它不起作用,因为它无法找到“rails.rb”文件(我认为这是在铁轨宝石没有这样的文件)。
可以或者需要特定的轨道部件,像的ActiveRecord':
require 'rubygems'
require 'activerecord'
或者使用 '宝石' 命令,如下所示:
require 'rubygems'
gem 'rails'
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