我正在使用rails版本3.2.6，我最近从4.0降级，因为我想在3版本环境中工作，因为教程我跟随他们使用版本3。
我在Windows 7机器上，这是我到目前为止所做的。
我首先做了宝石安装导轨-v 3.2.6
然后我做了宝石卸载导轨，并选择了我想安装的版本
然后我降级了依赖于rails版本4的gem，我在运行bundle install时没有遇到任何错误
现在，当我尝试使用rails s来查看我页面上的内容时，服务器永远不会启动，我得到了一堆文件名：
=> Booting WEBrick
=> Rails 3.2.6 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/dynamic_matchers.rb:50:in `method_missing'C:/Ruby200- x64/lib/ruby/gems/2.0.0/gems/orm_adapter-0.5.0/lib/orm_adapter/adapters/active_record.rb:81: warning: already initialized constant ActiveRecord::Base::OrmAdapter
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/orm_adapter-0.5.0/lib/orm_adapter/adapters/active_record.rb:81: warning: previous definition of OrmAdapter was here
: undefined method `migration_error=' for #<Class:0x000000053c7850> (NoMethodError)
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/railtie.rb:66:in `block (3 levels) in <class:Railtie>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/railtie.rb:65:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/railtie.rb:65:in `block (2 levels) in <class:Railtie>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:42:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/base.rb:721:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/devise-3.2.4/lib/devise/orm/active_record.rb:3:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Users/Beans/Desktop/TestMaker/config/initializers/devise.rb:22:in `block in <top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/devise-3.2.4/lib/devise.rb:288:in `setup'
from C:/Users/Beans/Desktop/TestMaker/config/initializers/devise.rb:3:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:245:in `load'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:245:in `block in load'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:245:in `load'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/engine.rb:588:in `block (2 levels) in <class:Engine>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/engine.rb:587:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/engine.rb:587:in `block in <class:Engine>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `instance_exec'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `run'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:54:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:54:in `run_initializers'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/application.rb:136:in `initialize!'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/railtie/configurable.rb:30:in `method_missing'
from C:/Users/Beans/Desktop/TestMaker/config/environment.rb:5:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Users/Beans/Desktop/TestMaker/config.ru:3:in `block in <main>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
from C:/Users/Beans/Desktop/TestMaker/config.ru:in `new'
from C:/Users/Beans/Desktop/TestMaker/config.ru:in `<main>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands/server.rb:46:in `app'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands/server.rb:70:in `start'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands.rb:55:in `block in <top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands.rb:50:in `tap'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands.rb:50:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
我知道这对某些人来说可能是一堆垃圾，但是如果有人可以帮助我那将是非常棒的。如果您需要更多信息，请告诉我。 提前谢谢你。
答案 0 :(得分：0)
由于我在Windows上使用rails，RVM不起作用，所以我使用了pik gem，并且我将环境改为3.2.6然后它工作正常。