在新的 Linux 安装上运行现有的 Rails 2.3.8 应用程序时，我遇到了一个有趣的问题。我已经安装了与运行它的服务器相同的所有 gem 版本。
首先，我不得不修改 Rakefile 以包含以下行，以停止有关未初始化常量 ActiveSupport::Dependencies::Mutex 的错误 -
require 'thread'
我认为这很不寻常，因为服务器上的 gem 版本与我在本地机器上安装的版本相匹配。当然，相同的代码应该功能相同。我觉得我一定遗漏了一些明显的东西。
无论如何，有了这个补丁我得到另一个错误：“未定义的方法名称”“RubyInline：String”
我找到了解决这个问题的解决方案，只需升级到 rails 2.3.12 - 我不热衷于这个想法，因为我想运行与生产服务器上相同版本的 rails 用于测试目的。我确实出于绝望尝试过，但它只是将错误推到了其他地方。
config/environment.rb:12 （以及一些后续行）
Rails::Initializer.run do |config|
config.gem 'hobo'
config.gem 'prawn'
config.gem 'image_science'
config.gem 'geokit'
config.gem 'redis'
rake db:reset --trace 的输出
john@john-tosh:~/Work/source/AndroidServer2$ rake db:reset --trace
(in /home/graham/Work/source/AndroidServer2)
DEPRECATION WARNING: Rake tasks in vendor/plugins/open_flash_chart/tasks, vendor/plugins/prawnto/tasks, vendor/plugins/recaptcha/tasks, and vendor/plugins/ym4r_gm/tasks are deprecated. Use lib/tasks instead. (called from /var/lib/gems/1.8/gems/rails-2.3.8/lib/tasks/rails.rb:10)
** Invoke db:reset (first_time)
** Invoke db:drop (first_time)
** Invoke db:load_config (first_time)
** Invoke rails_env (first_time)
** Execute rails_env
** Execute db:load_config
** Execute db:drop
** Invoke db:setup (first_time)
** Invoke db:create (first_time)
** Invoke db:load_config
** Execute db:create
** Invoke db:schema:load (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `name' for "RubyInline":String
/var/lib/gems/1.8/gems/rails-2.3.8/lib/rails/gem_dependency.rb:275:in `=='
/usr/lib/ruby/vendor_ruby/1.8/rubygems/dependency.rb:217:in `==='
/usr/lib/ruby/vendor_ruby/1.8/rubygems/dependency.rb:217:in `matching_specs'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `find_all'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/specification.rb:410:in `each'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/specification.rb:409:in `each'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/dependency.rb:216:in `find_all'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/dependency.rb:216:in `matching_specs'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/dependency.rb:238:in `to_specs'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/dependency.rb:256:in `to_spec'
/usr/lib/ruby/vendor_ruby/1.8/rubygems.rb:1208:in `gem'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/rails/gem_dependency.rb:73:in `add_load_paths'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:301:in `add_gem_load_paths'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:301:in `each'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:301:in `add_gem_load_paths'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:132:in `process'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113:in `send'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113:in `run'
/home/graham/Work/source/AndroidServer2/config/environment.rb:12
/usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
/usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
/var/lib/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require'
/var/lib/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in'
/var/lib/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require'
/var/lib/gems/1.8/gems/rails-2.3.8/lib/tasks/misc.rake:4
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/var/lib/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/var/lib/gems/1.8/gems/rake-0.8.7/bin/rake:31
/usr/local/bin/rake:19:in `load'
/usr/local/bin/rake:19