安裝 Rails_Admin 時出現問題

Question

我最初在我的 gemfile 中添加了gem 'rails_admin', :git => 'git://github.com/sferik/rails_admin.git'但我收到了這個錯誤：

Bundler could not find compatible versions for gem "rails":
  In snapshot (Gemfile.lock):
    rails (3.0.4)

  In Gemfile:
    rails_admin depends on
      rails (~> 3.0.7)

所以我更新到 rails 3.0.7 並rails_admin (0.0.1) from git://github.com/sferik/rails_admin.git (at master)

我在控制台中運行rake rails_admin:install並收到此錯誤：

rake aborted!
undefined method `task'

這是完整的跟蹤：

/Library/Ruby/Gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:215:in `initialize_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:139:in `load_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `send'
/Library/Ruby/Gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
/rubyprograms/dreamstill/Rakefile:7
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `load'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `load_rakefile'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:495:in  `raw_load_rakefile'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:78:in `load_rakefile'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:129:in `standard_exception_handling'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:77:in `load_rakefile'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:61:in `run'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:129:in `standard_exception_handling'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:59:in `run'
/Library/Ruby/Gems/1.8/gems/rake-0.9.0/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19

發生了什么事，如何安裝 rails_admin？

Answer 1

這是 rake 0.9 的一個已知問題。 要修復它，只需執行以下操作：

• 卸載 rake 0.9： gem uninstall rake -v 0.9
• 將此添加到您的 gemfile 中： gem 'rake', '~> 0.8.7
• 更新捆綁包： bundle update

你應該對 go 很好。