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我正在尽我所能在Ubuntu 11.04上安装Ruby on Rails。 我跟着这里的教程：http://stuffingabout.blogspot.com/2011/04/installing-rails-3-on-ubuntu-1104.htmlUbuntu Rails安装问题
这工作得很好，直到它被安装钢轨-3.0.10的文件，它有错误：
Installing RDoc documentation for rails-3.0.10... file 'lib' not found
我检查导轨但是使用rails -v真正安装和事实上安装了rails-3.0.10。
所以，我决定做一个测试轨道项目。每当我运行rake命令时，我遇到了主要问题。
这里是处理我的Rails项目
rails new blog
create
create README
create Rakefile
create config.ru
create .gitignore
create Gemfile
create app
create app/controllers/application_controller.rb
create app/helpers/application_helper.rb
create app/mailers
create app/models
create app/views/layouts/application.html.erb
create config
create config/routes.rb
create config/application.rb
create config/environment.rb
create config/environments
create config/environments/development.rb
create config/environments/production.rb
create config/environments/test.rb
create config/initializers
create config/initializers/backtrace_silencers.rb
create config/initializers/inflections.rb
create config/initializers/mime_types.rb
create config/initializers/secret_token.rb
create config/initializers/session_store.rb
create config/locales
create config/locales/en.yml
create config/boot.rb
create config/database.yml
create db
create db/seeds.rb
create doc
create doc/README_FOR_APP
create lib
create lib/tasks
create lib/tasks/.gitkeep
create log
create log/server.log
create log/production.log
create log/development.log
create log/test.log
create public
create public/404.html
create public/422.html
create public/500.html
create public/favicon.ico
create public/index.html
create public/robots.txt
create public/images
create public/images/rails.png
create public/stylesheets
create public/stylesheets/.gitkeep
create public/javascripts
create public/javascripts/application.js
create public/javascripts/controls.js
create public/javascripts/dragdrop.js
create public/javascripts/effects.js
create public/javascripts/prototype.js
create public/javascripts/rails.js
create script
create script/rails
create test
create test/fixtures
create test/functional
create test/integration
create test/performance/browsing_test.rb
create test/test_helper.rb
create test/unit
create tmp
create tmp/sessions
create tmp/sockets
create tmp/cache
create tmp/pids
create vendor/plugins
create vendor/plugins/.gitkeep
[email protected]:~/university/rails$ cd blog/
[email protected]:~/university/rails/blog$ bundle install
Fetching source index for http://rubygems.org/
Using rake (0.9.2)
Using abstract (1.0.0)
Using activesupport (3.0.10)
Using builder (2.1.2)
Using i18n (0.5.0)
Using activemodel (3.0.10)
Using erubis (2.6.6)
Using rack (1.2.3)
Using rack-mount (0.6.14)
Using rack-test (0.5.7)
Using tzinfo (0.3.29)
Using actionpack (3.0.10)
Using mime-types (1.16)
Using polyglot (0.3.2)
Using treetop (1.4.10)
Using mail (2.2.19)
Using actionmailer (3.0.10)
Using arel (2.0.10)
Using activerecord (3.0.10)
Using activeresource (3.0.10)
Using bundler (1.0.18)
Using rdoc (3.9.3)
Using thor (0.14.6)
Using railties (3.0.10)
Using rails (3.0.10)
Installing sqlite3 (1.3.4) with native extensions
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
[email protected]:~/university/rails/blog$ rake db:create
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:4: warning: already initialized constant MAJOR
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:5: warning: already initialized constant MINOR
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:6: warning: already initialized constant BUILD
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:3: warning: already initialized constant NUMBERS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:9: warning: already initialized constant VERSION
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake.rb:26: warning: already initialized constant RAKEVERSION
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/early_time.rb:17: warning: already initialized constant EARLY
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:28: warning: already initialized constant DEFAULT_RAKEFILES
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/task_arguments.rb:73: warning: already initialized constant EMPTY_TASK_ARGS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/invocation_chain.rb:49: warning: already initialized constant EMPTY
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_utils.rb:10: warning: already initialized constant RUBY
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_utils.rb:84: warning: already initialized constant LN_SUPPORTED
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/dsl_definition.rb:143: warning: already initialized constant Commands
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:44: warning: already initialized constant ARRAY_METHODS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:47: warning: already initialized constant MUST_DEFINE
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:51: warning: already initialized constant MUST_NOT_DEFINE
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:55: warning: already initialized constant SPECIAL_RETURN
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:61: warning: already initialized constant DELEGATING_METHODS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:364: warning: already initialized constant DEFAULT_IGNORE_PATTERNS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:370: warning: already initialized constant DEFAULT_IGNORE_PROCS
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake.rb:64: warning: already initialized constant FileList
/home/sean/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake.rb:65: warning: already initialized constant RakeFileUtils
rake aborted!
stack level too deep
对不起，我的代码长长的名单，但它可能会帮助解决问题。为什么耙子给我这个错误？
不确定你是否尝试过'bundle exec rake db：migrate'。不应该有所作为，但。 – rubish
本页回答似乎有效 http://stackoverflow.com/questions/3183495/rails-3-0-ruby-1-9-2rc-rake-commands-return-already-initialized-constant-s – Sean