創建新的Rails項目並運行rails -v時出錯

Question

我是Rails的新手，每次嘗試創建新項目時，似乎都會收到此錯誤。 是否有人對我需要如何處理此錯誤消息有任何見解？ 運行“ rails -v”時出現相同的錯誤

/Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:298:in `to_specs': Could not find 'json' (~> 1.4) among 137 total gem(s) (Gem::LoadError)
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1271:in `block in activate_dependencies'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1260:in `each'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1260:in `activate_dependencies'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1242:in `activate'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1274:in `block in activate_dependencies'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1260:in `each'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1260:in `activate_dependencies'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1242:in `activate'
from /Users/buckleyjosh/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_gem.rb:48:in `gem'
from /Users/buckleyjosh/.rvm/gems/ruby-1.9.3-p194/bin/rails:18:in `<main>'
from /Users/buckleyjosh/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `eval'
from /Users/buckleyjosh/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `<main>'

Answer 1

該錯誤正是它所抱怨的：

Could not find 'json' (~> 1.4) among 137 total gem(s)

在觸發任何rails命令之前安裝該gem：gem install json

如果您使用的是rvm，請在安裝gem之前確保已加載正確版本的ruby。
閱讀此寶石的更多信息。