上传rails服务器时如何确定哪些冲突或缺少或库？答案

【问题标题】：how to determinate which conflicts or lack or libraries when uploading rails server?上传rails服务器时如何确定哪些冲突或缺少或库？
【发布时间】：2013-11-12 20:34:11
【问题描述】：

我在 Rails 上非常新，我有一个问题是我试图在本地机器上设置我的项目（项目已经开始）并且我得到了大量的错误，我首先做了一个 bundle install 和之后下载我用 rails server 尝试过的所有 gems 和库，我的问题是我遇到了很多错误，我不知道我必须安装或做什么才能使其运行。

有什么想法吗？这是我的shell结果

我想我必须安装一些库.. 知道这些问题吗？

C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter.rb:195:in `
require': cannot load such file -- wdm (LoadError)

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
.rb:195:in `load_dependent_adapter'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
s/windows.rb:33:in `load_dependent_adapter'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
.rb:187:in `usable?'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
s/windows.rb:25:in `usable?'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
.rb:179:in `usable_and_works?'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
.rb:49:in `block in select_and_initialize'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
.rb:47:in `each'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/adapter
.rb:47:in `select_and_initialize'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/listene
r.rb:267:in `initialize_adapter'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/listene
r.rb:259:in `setup'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-1.0.2/lib/listen/listene
r.rb:49:in `start'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/lib/guard.rb:194:in
 `block in start'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/lib/guard.rb:368:in
 `block in within_preserved_state'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/lib/guard.rb:365:in
 `synchronize'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/lib/guard.rb:365:in
 `within_preserved_state'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/lib/guard.rb:190:in
 `start'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/lib/guard/cli.rb:11
0:in `start'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/command.rb
:27:in `run'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/invocation
.rb:120:in `invoke_command'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor.rb:363:in
`dispatch'

        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/thor-0.18.1/lib/thor/base.rb:43
9:in `start'

from C:/Ruby200/lib/ruby/gems/2.0.0/gems/guard-1.8.0/bin/guard:6:in `<to
p (required)>'

from C:/Ruby200/bin/guard:23:in `load'
from C:/Ruby200/bin/guard:23:in `<main>'

【问题讨论】：

标签： ruby-on-rails-3

【解决方案1】：

这只是一个错误，它只是向您展示了整个堆栈。也就是说，看第一行： "C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-.0.2/lib/listen/adapter.rb:195:in 'require': cannot load such file -- wdm (LoadError)"

这就是错误的根源。之后的几行显示了调用了哪些方法才能到达那里。

所以你只需要解决 "C:/Ruby200/lib/ruby/gems/2.0.0/gems/listen-.0.2/lib/listen/adapter.rb:195:in 'require': cannot load such file -- wdm (LoadError)"

我最初在这里找到了答案：Guard won't load WDM

Listen gem 需要 WDM Gem 才能在 Windows 上正常工作。您可以通过将此行添加到您的 Gemfile 来完成此操作：

gem 'wdm', '>= 0.1.0' if RbConfig::CONFIG['target_os'] =~ /mswin|mingw/i

这一行简单地说，如果您的操作系统是“mwin”或“mingw”，则需要“wdm”gem。

保存 Gemfile 后，再次运行 bundler install 以确保 wdm 已安装。

【讨论】：

【解决方案2】：

我使用的是 Windows 8 并遇到了这个“--wdm (LoadError)”，我只是在运行 ruby（不是使用 rails），一个简单的“gem install wdm”就可以了。

【讨论】：