我是ROR的新手，我正在尝试在本地服务器上运行现有的rails应用程序 . 但是当我尝试迁移数据库时，它以某种方式失败了 . 请参阅下面的完整描述
耙子流产！ LoadError：无法加载此类文件 - eventmachine C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/activesupport-5.0.7/lib/active_support/dependencies.rb：293：在require'C：/ Ruby24-x64 / lib / ruby / gems / 2.4.0 / gems / activesupport-5.0.7 / lib / active_support / dependencies.rb:293：inblock in require'C：/Ruby24-x64/lib/ruby/gems/2.4 .0 / gems / activesupport-5.0.7 / lib / active_support / dependencies.rb：259：在load_dependency中'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/activesupport-5.0.7/lib /active_support/dependencies.rb:293:inrequire'C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/thin-1.7.2/lib/thin.rb:7:in <top（必填） >'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/bundler-1.16.4/lib/bundler/runtime.rb:81:inrequire'C:/Ruby24-x64/lib/ruby/ gems / 2.4.0 / gems / bundler-1.16.4 / lib / bundler / runtime.rb：81：在需要'C：/Ruby24-x64/lib/ruby/gems/2.4.0/的块（2级）中gems / bundler-1.16.4 / lib / bundler / runtime.rb：76：ineach'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/bundler-1.16.4/lib/bundler/runtime .rb：76：在require'C：/ Ruby24-x64 / lib / r中的块中uby / gems / 2.4.0 / gems / bundler-1.16.4 / lib / bundler / runtime.rb:65:ineach'C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/bundler-1.16 .4 / lib / bundler / runtime.rb：65：在require'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/bundler-1.16.4/lib/bundler.rb:114:inrequire 'C：/promotracks-rails/config/application.rb:7:in <top（required）>'C：/Ruby24-x64/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:inrequire 'C：/Ruby24-x64/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in require'C：/ promotracks-rails / Rakefile：4：in'C：/ Ruby24-x64 / lib /ruby/gems/2.4.0/gems/rake-12.3.1/lib/rake/rake_module.rb:29:in load'C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake -12.3.1 / lib / rake / rake_module.rb：29：inload_rakefile'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake-12.3.1/lib/rake/application.rb: 703：在raw_load_rakefile中'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake-12.3.1/lib/rake/application.rb:104：load_rakefile中的inblock'C：/ Ruby24-x64 /lib/ruby/gems/2.4.0/gems/rake-12.3.1/lib/rake/application.rb:186:in standard_exception_handl ing'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake-12.3.1/lib/rake/application.rb:103：inload_rakefile'C：/ Ruby24-x64 / lib / ruby / gems / 2.4.0 / gems / rake-12.3.1 / lib / rake / application.rb：82：在运行'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake-中的块中12.3.1 / lib / rake / application.rb:186:instandard_exception_handling'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake-12.3.1/lib/rake/application.rb:80 ：在运行'C：/Ruby24-x64/lib/ruby/gems/2.4.0/gems/rake-12.3.1/exe/rake:27:in'C：/ Ruby24-x64 / bin / rake：23：在加载'C：/ Ruby24-x64 / bin / rake：23：in'
（我安装了ruby，rails，gem和bundler）
2 回答
它的主旨Rails应用程序与Windows环境不兼容所以只需切换到mac或linux .
根据帖子中分享的日志：
尽管eventmachine是作为x64-mingw平台gem提供的，但它不支持早期修复的ruby-2.4或2.5 . 所以会建议你做以下事情：
首先，（在Windows Ruby 2.4上）确保删除所有版本的eventmachine，例如
然后使用下面提到的命令重新安装：