克隆我的存储库时，我正在开发它的目录，我收到一个错误。奇怪的是它使用相同版本的Ruby和相同的Gemset，但我觉得这个错误仍然来自Gems的错误。有人知道可能导致它的原因吗？有我的宝石：
source 'https://rubygems.org'
gem 'rails', '3.2.2'
gem 'mysql2'
gem 'activeadmin'
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
错误如下：
eml/orchid → master rails s
=> Booting WEBrick
=> Rails 3.2.2 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/actionpack-3.2.2/lib/action_dispatch/middleware/stack.rb:120:in `assert_index': No such middleware to insert before: "Rack::Sendfile" (RuntimeError)
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/actionpack-3.2.2/lib/action_dispatch/middleware/stack.rb:83:in `insert'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/configuration.rb:38:in `block in merge_into'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/configuration.rb:37:in `each'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/configuration.rb:37:in `merge_into'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/engine.rb:469:in `app'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/application/finisher.rb:31:in `block in <module:Finisher>'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/initializable.rb:30:in `run'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/initializable.rb:54:in `each'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/application.rb:136:in `initialize!'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/eml/Projects/orchid/orchid/config/environment.rb:5:in `<top (required)>'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:251:in `require'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:251:in `block in require'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:236:in `load_dependency'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:251:in `require'
from /Users/eml/Projects/orchid/orchid/config.ru:4:in `block in <main>'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
from /Users/eml/Projects/orchid/orchid/config.ru:1:in `new'
from /Users/eml/Projects/orchid/orchid/config.ru:1:in `<main>'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/commands/server.rb:46:in `app'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/commands/server.rb:70:in `start'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/commands.rb:55:in `block in <top (required)>'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/commands.rb:50:in `tap'
from /Users/eml/.rvm/gems/ruby-1.9.3-p125@LampPostDb/gems/railties-3.2.2/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
谢谢！
更新：将其搞砸，以便它在初始目录中也不起作用。绝对与某些宝石有关。
UPDATE2 ：通过RVM创建了一个新的gemset并运行了bundle install，这里是gems及其安装版本的简要说明：
eml/LampPostDb → master rvm --rvmrc --create 1.9.3-p125@railsadmin
eml/LampPostDb → master bundle install
Fetching source index for https://rubygems.org/
Installing rake (0.9.2.2)
Installing i18n (0.6.0)
Installing multi_json (1.1.0)
Installing activesupport (3.2.2)
Installing builder (3.0.0)
Installing activemodel (3.2.2)
Installing erubis (2.7.0)
Installing journey (1.0.3)
Installing rack (1.4.1)
Installing rack-cache (1.2)
Installing rack-test (0.6.1)
Installing hike (1.2.1)
Installing tilt (1.3.3)
Installing sprockets (2.1.2)
Installing actionpack (3.2.2)
Installing mime-types (1.18)
Installing polyglot (0.3.3)
Installing treetop (1.4.10)
Installing mail (2.4.4)
Installing actionmailer (3.2.2)
Installing sass (3.1.15)
Installing bourbon (1.4.0)
Installing bcrypt-ruby (3.0.1) with native extensions
Installing orm_adapter (0.0.6)
Installing rack-ssl (1.3.2)
Installing json (1.6.5) with native extensions
Installing rdoc (3.12)
Installing thor (0.14.6)
Installing railties (3.2.2)
Installing warden (1.1.1)
Installing devise (2.0.4)
Installing fastercsv (1.5.4)
Installing formtastic (2.1.1)
Installing has_scope (0.5.1)
Installing responders (0.9.0)
Installing inherited_resources (1.3.1)
Installing jquery-rails (2.0.1)
Installing kaminari (0.13.0)
Installing arel (3.0.2)
Installing tzinfo (0.3.32)
Installing activerecord (3.2.2)
Installing polyamorous (0.5.0)
Installing meta_search (1.1.3)
Installing activeresource (3.2.2)
Using bundler (1.0.21)
Installing rails (3.2.2)
Installing activeadmin (0.4.3)
Installing coffee-script-source (1.2.0)
Installing execjs (1.3.0)
Installing coffee-script (2.2.0)
Installing coffee-rails (3.2.2)
Installing mysql2 (0.3.11) with native extensions
Installing sass-rails (3.2.5)
Installing uglifier (1.2.3)
答案 0 :(得分：6)
当然，我在问到这个问题后找到了罪魁祸首。最初我有had found an issue on Github describing a simlar problem，但我没有compass.rb初始化程序。我没想到的是我有一个 sass.rb 初始化程序，它包含几乎相同的代码行。
我不完全确定是否可以评论整个文件是否合适，或者是否会导致一系列问题。该应用程序现在开始正常，但未来只能说明。
如果某人有更好的答案，我会高兴地将他们的答案标记为正确。