我一直在为班级从事 Ruby on Rails 项目，但遇到了一些问题。当我运行 bundle install 时，我所有的 gem 都会正确安装。当我运行 rake db:setup 时，出现以下错误。
tuggernuts2@tn-Extensa5620:~/Workspace/Class/baseball-manager$ rake db:setup
rake aborted!
cannot load such file -- ./bundler/setup
/home/tuggernuts2/Workspace/Class/baseball-manager/config/boot.rb:6:in `<top (required)>'
/home/tuggernuts2/Workspace/Class/baseball-manager/config/application.rb:1:in `<top (required)>'
/home/tuggernuts2/Workspace/Class/baseball-manager/Rakefile:5:in `<top (required)>'
(See full trace by running task with --trace)
当我尝试运行任何单元测试时，我也会收到此错误：
tuggernuts2@tn-Extensa5620:~/Workspace/Class/baseball-manager$ ruby test/unit/user_test.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in `require': cannot load such file -- ./bundler/setup (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from /home/tuggernuts2/Workspace/Class/baseball-manager/config/boot.rb:6:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /home/tuggernuts2/Workspace/Class/baseball-manager/config/application.rb:1:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /home/tuggernuts2/Workspace/Class/baseball-manager/config/environment.rb:2:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /home/tuggernuts2/Workspace/Class/baseball-manager/test/test_helper.rb:2:in `<top (required)>'
from test/unit/user_test.rb:2:in `require_relative'
from test/unit/user_test.rb:2:in `<main>'
我正在与其他 4 人一起从事这个项目，但没有其他人收到这些错误，所以我推断问题出在我的设置上，而不是代码上。
我正在运行 ruby 版本“ruby 1.9.3p194（2012-04-20 修订版 35410）[x86_64-linux]”
我正在运行 ruby gems 1.8.23 版
我正在运行 rails 3.2.5 版
但是当我运行 rails -v 时，我得到相同的 require 错误，以及与上面相同的 ./bundler/setup 错误。我在谷歌上搜索这些问题已经有一段时间了，到目前为止我发现的解决方案都没有帮助。
我试过重新安装 gems，我试过运行 gem update -system，但这只是给了我：
ERROR: While executing gem ... (RuntimeError)
gem update --system is disabled on Debian, because it will overwrite the content of the rubygems Debian package, and might break your Debian system in subtle ways. The Debian-supported way to update rubygems is through apt-get, using Debian official repositories.
If you really know what you are doing, you can still update rubygems by setting the REALLY_GEM_UPDATE_SYSTEM environment variable, but please remember that this is completely unsupported by Debian.
从昨天开始，rake 错误是新的，ruby 要求错误从一开始就几乎存在。生活一直是一场斗争。
我尝试了一堆 require、require "./..."、require_relative 的组合，但似乎没有任何东西可以修复 require 错误。
任何和所有的帮助表示赞赏。提前致谢。
编辑：输出来自：bundle exec rake db:setup --trace
tuggernuts2@tn-Extensa5620:~/Workspace/Class/baseball-manager$ bundle exec rake db:setup --trace
rake aborted!
cannot load such file -- ./bundler/setup
/home/tuggernuts2/Workspace/Class/baseball-manager/config/boot.rb:7:in `require'
/home/tuggernuts2/Workspace/Class/baseball-manager/config/boot.rb:7:in `<top (required)>'
/home/tuggernuts2/Workspace/Class/baseball-manager/config/application.rb:1:in `require'
/home/tuggernuts2/Workspace/Class/baseball-manager/config/application.rb:1:in `<top (required)>'
/home/tuggernuts2/Workspace/Class/baseball-manager/Rakefile:5:in `require'
/home/tuggernuts2/Workspace/Class/baseball-manager/Rakefile:5:in `<top (required)>'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/rake_module.rb:25:in `load'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/rake_module.rb:25:in `load_rakefile'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:583:in `raw_load_rakefile'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:89:in `block in load_rakefile'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:160:in `standard_exception_handling'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:88:in `load_rakefile'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:72:in `block in run'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:160:in `standard_exception_handling'
/var/lib/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:70:in `run'
/var/lib/gems/1.9.1/gems/rake-10.0.3/bin/rake:33:in `<top (required)>'
/usr/local/bin/rake:23:in `load'
/usr/local/bin/rake:23:in `<main>'