Question

我问这个也是为了提供答案，因为我在弄清楚出了什么问题时遇到了很多麻烦，谷歌没有多大帮助 - 但是，因为这是StackOverflow，我我相信有人会更有能力地回答这个问题或者改善答案。

我需要为我正在处理的rails应用程序升级gem，它引入了两个新的依赖项，其中一个是mime-types。在本地工作，我将以下行添加到config/environment.rb：

config.gem 'mime-types', :version => '1.17'

要在我们的服务器上进行部署，必须在vendor/gems中安装所有gem依赖项，然后我将mime-types gem安装到当前的rvm gemset中：

gem install mime-types --version 1.17

...并将其版本解压缩到vendor/gems，其中包含：

rake gems:unpack
rake gems:unpack:dependencies

但是，在服务器上部署之后，我发现当运行rake db:migrate时，出现以下错误，表示找不到mime-types gem（堆栈跟踪部分省略）：< / p>

no such file to load -- mime-types
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
[...]
/lib/tasks/misc.rake:4
/usr/lib/ruby/1.8/rake.rb:636:in `call'
/usr/lib/ruby/1.8/rake.rb:636:in `execute'
/usr/lib/ruby/1.8/rake.rb:631:in `each'
/usr/lib/ruby/1.8/rake.rb:631:in `execute'
/usr/lib/ruby/1.8/rake.rb:597:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/1.8/rake.rb:590:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/rake.rb:607:in `invoke_prerequisites'
/usr/lib/ruby/1.8/rake.rb:604:in `each'
/usr/lib/ruby/1.8/rake.rb:604:in `invoke_prerequisites'
/usr/lib/ruby/1.8/rake.rb:596:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/1.8/rake.rb:590:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/rake.rb:583:in `invoke'
/usr/lib/ruby/1.8/rake.rb:2051:in `invoke_task'
/usr/lib/ruby/1.8/rake.rb:2029:in `top_level'
/usr/lib/ruby/1.8/rake.rb:2029:in `each'
/usr/lib/ruby/1.8/rake.rb:2029:in `top_level'
/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/1.8/rake.rb:2023:in `top_level'
/usr/lib/ruby/1.8/rake.rb:2001:in `run'
/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/1.8/rake.rb:1998:in `run'
/usr/bin/rake:28
no such file to load -- mime-types
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
[...]
/lib/tasks/misc.rake:4
/usr/lib/ruby/1.8/rake.rb:636:in `call'
/usr/lib/ruby/1.8/rake.rb:636:in `execute'
/usr/lib/ruby/1.8/rake.rb:631:in `each'
/usr/lib/ruby/1.8/rake.rb:631:in `execute'
/usr/lib/ruby/1.8/rake.rb:597:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/1.8/rake.rb:590:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/rake.rb:607:in `invoke_prerequisites'
/usr/lib/ruby/1.8/rake.rb:604:in `each'
/usr/lib/ruby/1.8/rake.rb:604:in `invoke_prerequisites'
/usr/lib/ruby/1.8/rake.rb:596:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/1.8/rake.rb:590:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/rake.rb:583:in `invoke'
/usr/lib/ruby/1.8/rake.rb:2051:in `invoke_task'
/usr/lib/ruby/1.8/rake.rb:2029:in `top_level'
/usr/lib/ruby/1.8/rake.rb:2029:in `each'
/usr/lib/ruby/1.8/rake.rb:2029:in `top_level'
/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/1.8/rake.rb:2023:in `top_level'
/usr/lib/ruby/1.8/rake.rb:2001:in `run'
/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/1.8/rake.rb:1998:in `run'
/usr/bin/rake:28
Missing these required gems:
  mime-types = 1.17

You're running:
  ruby 1.8.7.302 at /usr/bin/ruby1.8
  rubygems 1.3.7 at /home/mark/.gem/ruby/1.8, /var/lib/gems/1.8

Run `rake gems:install` to install the missing gems.

但mime-types中存在vendor/gems/mime-types-1.17。为什么rake不认为在这种情况下安装了宝石？

Answer 1

一位同事帮我解决了这个问题：似乎Rails希望vendor/gems中的所有宝石都有一个特定的布局，mime-types不符合。解决方案是更改environment.rb中指定依赖mime-type的行以添加:lib选项，该选项应指定一个相对路径，指示如何到达gem中的源：

config.gem 'mime-types', :version => '1.17', :lib => 'mime/types'

这意味着根据宝石名称vendor/gems/mime-types-1.17/lib/mime/types

查看vendor/gems/mime-types-1.17/lib/mime-types/而不是默认值

Answer 2

只需删除ruby文件中的require 'mime-types'。

因为mime-types是用ruby构建的。您不需要安装其gem或明确包含它。

只需使用它。这适合我。

为什么不能找到mime-types gem（在vendor / gems中解压缩）？

2 个答案: