跟着 web 开发敏捷之道第三版这本书学习，好不容易一天时间折腾好了环境，照着书依葫芦画瓢。 跑到这一步得时候报错了。。 rake db:migrate

 rake db:migrate
/home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:75:in `setup': undefined method `name' for #<Array:0xb7176c60> (NoMethodError)
    from /home/wison/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `map'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:75:in `each'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:75:in `map'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:75:in `setup'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:114:in `check'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:121
    from /home/wison/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
    from /home/wison/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems_executable_plugin.rb:4
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/executable-hooks-1.2.6/lib/executable-hooks/hooks.rb:50:in `call'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/executable-hooks-1.2.6/lib/executable-hooks/hooks.rb:50:in `run'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/executable-hooks-1.2.6/lib/executable-hooks/hooks.rb:49:in `each'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374@global/gems/executable-hooks-1.2.6/lib/executable-hooks/hooks.rb:49:in `run'
    from /home/wison/.rvm/gems/ruby-1.8.7-p374/bin/ruby_executable_hooks:10

不知道为什么。盼高手予以解答。 gem list

*** LOCAL GEMS ***

actionmailer (2.2.2) actionpack (2.2.2) activerecord (2.2.2) activeresource (2.2.2) activesupport (2.2.2) bundler (1.3.5) bundler-unload (1.0.2) executable-hooks (1.2.6) rails (2.2.2) rake (0.8.3) ref (1.0.5) rubygems-bundler (1.4.2) rubygems-update (2.1.10, 1.3.7, 1.3.5) rvm (1.11.3.8) sqlite3 (1.3.8) sqlite3-ruby (1.3.3)