章魚寶石的Rails錯誤中類'Class'（NameError）的未定義方法'announce'

Question

在將數據庫分片寶石章魚添加到我的應用程序中后，出現以下錯誤。有人可以幫助我嗎？

/usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/core_ext/module/aliasing.rb:31:in `alias_method': undefined method `announce' for class `Class' (NameError)
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/core_ext/module/aliasing.rb:31:in `alias_method_chain'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus/migration.rb:9:in `extended'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus/migration.rb:73:in `extend'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus/migration.rb:73
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:640:in `new_constants_in'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus.rb:66
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `each'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `each'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler.rb:122:in `require'
    from /var/www/scandetails/config/application.rb:7
    from /usr/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/commands.rb:38:in `require'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/commands.rb:38
    from script/rails:6:in `require'
    from script/rails:6

Answer 1

根據此拉取請求 ，已在gem的master分支中添加了Rails 3.1支持，但是尚未發布更新版本。 您可以通過引用Gemfile中的github存儲庫，將存儲庫的master分支用作gem的源：

gem 'ar-octopus', :git => "git://github.com/tchandy/octopus.git", :require => "octopus"

Answer 2

我嘗試從master分支reporsitoty使用ar-octupos，但捆綁安裝仍然出現錯誤。

Bundler could not find compatible versions for gem "activesupport":

在快照（Gemfile.lock）中：activesupport（3.1.12）在Gemfile中：ar-octopus（> = 0）ruby取決於activesupport（> = 3.2.0）ruby運行bundle update將僅使用以下命令從頭開始重建快照。您的Gemfile中的gems，可以解決沖突。