缺少這些必需的 gem：mongrel（但已安裝）

我正在嘗試為 redmine 1.4.4 安裝新外掛。複製文件夾並執行rake db:migrate_plugins RAILS_ENV=production rake 寫道：

Missing these required gems:
 mongrel  >= 0

You're running:
 ruby 1.8.7.370 at C:/Ruby187/bin/ruby.exe
 rubygems 1.8.24 at C:/Ruby187/lib/ruby/gems/1.8, C:/Users/adm/.gem/ruby/1.8

Run `rake gems:install` to install the missing gems.

耙寶石：安裝 –trace：

rake aborted!
uninitialized constant Mongrel
** Invoke gems:install (first_time)
** Invoke gems:base (first_time)
** Execute gems:base
** Invoke environment (first_time)
** Execute environment
rake aborted!
uninitialized constant Mongrel
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:469:in `load_missing_constant'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:106:in `const_missing'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:118:in `const_missing'
C:/Ruby187/redmine-1.4.4/config/mongrel.rb:20
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:547:in `new_constants_in'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby187/redmine-1.4.4/config/environment.rb:62
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:547:in `new_constants_in'
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/tasks/misc.rake:4
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `execute'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `invoke_with_call_chain'
C:/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/tasks/gems.rake:17
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `execute'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `invoke_with_call_chain'
C:/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:176:in `invoke_prerequisites'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `each'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `invoke_prerequisites'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:157:in `invoke_with_call_chain'
C:/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `top_level'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `top_level'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `run'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.9.2.2/bin/rake:33
C:/Ruby187/bin/rake:23:in `load'
C:/Ruby187/bin/rake:23
Tasks: TOP => environment

gem list顯示安裝了 mongrel (1.1.5 x86-mingw32)。一切都在 Windows 2008 伺服器 x64 上執行。在 mongrel win 服務工作的 Redmine。

從安裝指南中引用：

如果您需要載入 Redmine 核心不需要的任何 gem（例如 mongrel、fcgi），Gemfile.local請在您的 redmine 目錄的根目錄下創建一個名為的文件。執行時會自動載入bundle install。例子：

# Gemfile.local
gem "mongrel" 

將 Mongrel gem 的權限與已驗證的 gem 進行比較。

附帶說明：您使用 Ruby1.8.7 是否有原因？它相當古老。RedMine 需要嗎？

引用自：https://serverfault.com/questions/417309