栏杆教程，用于使用Cancan和Twitter Bootstrap设计

Question

无法运行此开源项目http://railsapps.github.com/tutorial-rails-bootstrap-devise-cancan.html.i'我使用Ruby version1.9.9.3p286和铁路3.2.8。我已经成功安装了所有宝石，但是当试图从红宝石输出中跑步时以下内容：

/Users/st/.rvm/rubies/ruby-1.9.3-p286/bin/ruby -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /Users/st/projects/rails3-bootstrap-devise-cancan/script/rails server -b 0.0.0.0 -p 3000 -e development
/Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/spec_set.rb:90:in `block in materialize': Could not find diff-lcs-1.1.3 in any of the sources (Bundler::GemNotFound)
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/spec_set.rb:83:in `map!'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/spec_set.rb:83:in `materialize'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/definition.rb:113:in `specs'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/definition.rb:158:in `specs_for'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/definition.rb:147:in `requested_specs'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/environment.rb:23:in `requested_specs'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/runtime.rb:11:in `setup'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler.rb:116:in `setup'
    from /Users/st/.rvm/gems/ruby-1.9.3-p286@global/gems/bundler-1.2.1/lib/bundler/setup.rb:17:in `<top (required)>'
    from /Users/st/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
    from /Users/st/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
    from /Users/st/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
    from /Users/st/projects/rails3-bootstrap-devise-cancan/config/boot.rb:6:in `<top (required)>'
    from /Users/st/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/st/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/st/projects/rails3-bootstrap-devise-cancan/script/rails:5:in `<top (required)>'
    from -e:1:in `load'
    from -e:1:in `<main>'
Process finished with exit code 1

我的gemfile：

source 'https://rubygems.org'
gem 'rails', '3.2.8'
gem 'sqlite3'
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
gem "rspec-rails", ">= 2.11.0", :group => [:development, :test]
gem "email_spec", ">= 1.2.1", :group => :test
gem "cucumber-rails", ">= 1.3.0", :group => :test, :require => false
gem "database_cleaner", ">= 0.8.0", :group => :test
gem "launchy", ">= 2.1.2", :group => :test
gem "capybara", ">= 1.1.2", :group => :test
gem "factory_girl_rails", ">= 4.1.0", :group => [:development, :test]
gem "bootstrap-sass", ">= 2.1.0.0"
gem "devise", ">= 2.1.2"
gem "cancan", ">= 1.6.8"
gem "rolify", ">= 3.2.0"
gem "simple_form", ">= 2.0.3"
gem "quiet_assets", ">= 1.0.1", :group => :development

Answer 1

它找不到diff-lcs-1.1.3 GEM，尝试手动安装或手动安装GEM。

编辑：查看您的宝石文件，它缺少

gem "diff-lcs", "1.1.3"

Answer 2

@baboon的解决方案的添加很少，尝试删除gem.lock.lock文件并再次运行 bundle install

，一旦您对示例感到满意，您可能会对"铁轨作曲家"感兴趣，以生成铁轨骨架

hth