需要帮助解决 RAILS 3.0.9 迁移问题

Question

我遇到了一些严重的 Rails 问题。我已经有一段时间没有使用它了，所以我检查并更新了 rvm、rails 等。我当前正在运行以下命令：

RVM -- rvm 1.6.25 by Wayne E. Seguin ([email protected]) [https://rvm.beginrescueend.com/]

RAILS -- Rails 3.0.9

RUBY -- ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]

我执行以下步骤：

rails new my_project

cd my_project

bundle install

rails g scaffold person first_name:string last_name:string

rake db:migrate

/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:4: warning: already initialized constant MAJOR
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:5: warning: already initialized constant MINOR
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:6: warning: already initialized constant BUILD
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:3: warning: already initialized constant NUMBERS
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/version.rb:9: warning: already initialized constant VERSION
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake.rb:26: warning: already initialized constant RAKEVERSION
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/early_time.rb:17: warning: already initialized constant EARLY
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
/Users/devuser/.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
/Users/devuser/.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
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/invocation_chain.rb:49: warning: already initialized constant EMPTY
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_utils.rb:10: warning: already initialized constant RUBY
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_utils.rb:84: warning: already initialized constant LN_SUPPORTED
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/dsl_definition.rb:143: warning: already initialized constant Commands
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:44: warning: already initialized constant ARRAY_METHODS
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:47: warning: already initialized constant MUST_DEFINE
/Users/devuser/.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
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:55: warning: already initialized constant SPECIAL_RETURN
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/file_list.rb:61: warning: already initialized constant DELEGATING_METHODS
/Users/devuser/.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
/Users/devuser/.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
/Users/devuser/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake.rb:64: warning: already initialized constant FileList
/Users/devuser/.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

提前致谢！

Answer 1

从我的博客复制的解决方案： http://joneslee85.wordpress.com/2011/07/29/howto-fix-rake-0-9-2-to-work-with-ruby-1-9-2-under- rvm/

最好的方法：
我不认为恢复到 0.8.7 是最好的答案，因为如果你使用 RVM 编译 1.9.2，你会遇到这个问题。以下是解决这个问题的方法：

• gem list | grep 'rake'，您将看到这个rake (0.9.2 ruby​​)。现在请仔细注意关键字“ruby”是作恶者，它实际上是@global文件夹中rake的重复。我认为这可能是 RVM 错误。
• 现在我们需要删除 rake，请执行：gem uninstall rake，当它警告它将破坏依赖项时说 Y，如果它要求删除可执行文件“rake”，也说 Y。
• 现在，再次检查gem list | grep 'rake' 你只会看到 rake (0.9.2)

这将解决这个问题。

第二种方法：恢复到 0.8.7

好的，您将无法卸载 rake 0.9.2，因为 RVM 将 rake 安装到了 @global 文件夹中。因此，您可以在安装 rake 0.8.7 之前手动删除 rake 0.9.2：

gem list -d rake

并注意 Installed at: /Users/mojo/.rvm/gems/ruby-1.9.2-p290@global< /em> 在输出中。你的将与我的不同，所以请注意，现在我们需要使用以下命令删除 rake：

注意：请确保使用 \ 转义字符 @

rm /Users/mojo/.rvm/gems/ruby-1.9.2-p290\@global/bin/rake
rm /Users/mojo/.rvm/gems/ruby-1.9.2-p290\@global/cache/rake-0.9.2.gem
rm -rf /Users/mojo/.rvm/gems/ruby-1.9.2-p290\@global/doc/rake-0.9.2/
rm -rf /Users/mojo/.rvm/gems/ruby-1.9.2-p290\@global/gems/rake-0.9.2/
rm /Users/mojo/.rvm/gems/ruby-1.9.2-p290\@global/specifications/rake-0.9.2.gemspec

接下来是使用 gem install rake -v= 安装 rake 0.8.7 0.8.7

Answer 2

删除 rake 0.9.2 并安装 rake 0.8.7 并查看是否有效。

众所周知，rake 0.9.x 分支可以完全破坏任何 Rails 安装。