我使用gem 'countries', require: 'iso3166' .
当我尝试启动服务器时，出现此错误：
rake aborted!
LoadError: cannot load such file -- iso3166
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler/runtime.rb:77:in `require'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler/runtime.rb:77:in `block (2 levels) in require'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `each'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `each'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `require'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/gems/bundler-1.11.2/lib/bundler.rb:99:in `require'
/home/davide/Desktop/app/koodos/config/application.rb:14:in `<top (required)>'
/home/davide/Desktop/app/koodos/Rakefile:4:in `require'
/home/davide/Desktop/app/koodos/Rakefile:4:in `<top (required)>'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/bin/ruby_executable_hooks:15:in `eval'
/home/davide/.rvm/gems/ruby-2.1.5@ekoodo/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)
我尝试再次运行bundle install，但没有帮助。我在网上搜索了类似的问题，但我找不到任何解决方案。
知道可能导致错误的原因吗？
将其添加到您的 gemfile 中并再次捆绑
gem 'countries', :require => 'countries/global'
iso3166模块已添加到 gem 本身。
您可以查看文档 https://github.com/hexorx/countries
国家/
地区 1.2.0 及更高版本需要与以前不同的包含。由于您被锁定在 1.2.5，请使用新的要求。
gem 'countries', :require => 'countries/global'
如果这仍然是一个问题，请运行bundle install 。