創建新項目後無法啓動rails服務

Question

新的rails服務器...我使用的是mac並創建了一個新的rails項目，但服務器無法啓動。這是我得到的錯誤。 我在這臺Mac上有另一個項目，使用該項目時可以啓動服務器。 任何人都可以在這個上體驗？謝謝！

/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.1.0/psych.bundle: warning: already initialized constant ANY 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.1.0/psych.bundle: warning: already initialized constant UTF8 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.1.0/psych.bundle: warning: already initialized constant UTF16LE 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/x86_64-darwin12.1.0/psych.bundle: warning: already initialized constant UTF16BE 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/stream.rb:12: warning: already initialized constant ANY 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/stream.rb:15: warning: already initialized constant UTF8 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/stream.rb:18: warning: already initialized constant UTF16LE 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/stream.rb:21: warning: already initialized constant UTF16BE 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/sequence.rb:42: warning: already initialized constant ANY 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/sequence.rb:45: warning: already initialized constant BLOCK 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/sequence.rb:48: warning: already initialized constant FLOW 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/scalar.rb:9: warning: already initialized constant ANY 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/scalar.rb:12: warning: already initialized constant PLAIN 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/scalar.rb:15: warning: already initialized constant SINGLE_QUOTED 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/scalar.rb:18: warning: already initialized constant DOUBLE_QUOTED 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/scalar.rb:21: warning: already initialized constant LITERAL 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/scalar.rb:24: warning: already initialized constant FOLDED 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/mapping.rb:16: warning: already initialized constant ANY 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/mapping.rb:19: warning: already initialized constant BLOCK 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/nodes/mapping.rb:22: warning: already initialized constant FLOW 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/visitors/visitor.rb:10: warning: already initialized constant DISPATCH 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/scalar_scanner.rb:8: warning: already initialized constant TIME 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/scalar_scanner.rb:11: warning: already initialized constant FLOAT 
/Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/parser.rb:33:in `<class:Parser>': superclass mismatch for class Mark (TypeError) 
from /Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/parser.rb:32:in `<module:Psych>' 
from /Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych/parser.rb:1:in `<top (required)>' 
from /Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych.rb:7:in `require' 
from /Users/sisigu/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/psych.rb:7:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/ordered_hash.rb:2:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/ordered_hash.rb:2:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/ordered_options.rb:1:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/ordered_options.rb:1:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/configuration.rb:2:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/configuration.rb:2:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/railtie.rb:2:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/railtie.rb:2:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/engine.rb:1:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/engine.rb:1:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/plugin.rb:1:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/plugin.rb:1:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application.rb:3:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/application.rb:3:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails.rb:10:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails.rb:10:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/all.rb:1:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/all.rb:1:in `<top (required)>' 
from /Users/sisigu/sisi_rails_projects/first_app/config/application.rb:3:in `require' 
from /Users/sisigu/sisi_rails_projects/first_app/config/application.rb:3:in `<top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:53:in `require' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:53:in `block in <top (required)>' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `tap' 
from /Users/sisigu/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.8/lib/rails/commands.rb:50:in `<top (required)>' 
from script/rails:6:in `require' 
from script/rails:6:in `<main>' 

Answer 1

創建跳轉到項目目錄後，再用bundle install命令安裝包，並與rails server命令啓動軌道服務器。