使用Rails3和Ruby1.9.2运行Mongrel的LoadError
我是个编程新手(以前只学过html/css/design)，试图通过《简单的Rails 2》这本书开始学习RoR。然而，我想从最新版本的Ruby(1.9.2)和Rails (3)开始，所以我不得不在没有这本书的情况下完成所有的配置。我通过google和stackoverflow看了很多。当我运行rails server时，它会自动使用Webrick，但我想使用Mongrel。我通过gem install mongrel --pre安装了预发行版Mongrel，并删除了之前的版本。我读到为了让Mongrel使用rails server，我不得不将gem 'mongrel'添加到Gemfile中，但我不知道我应该将它添加到哪一个中(我尝试了几次，但没有任何改变)。因此，我决定通过git查看混合文档，并在运行mongrel_rails start时了解到以下内容：
C:\Ruby192\shovell>mongrel_rails start
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment... C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler/runtime.rb:27:in
'block in setup': You have already activated mongrel 1.2.
0.pre2, but your Gemfile requires mongrel 1.1.5. Consider using bundle exec. (Gem::LoadError)
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler/spec_set.rb:12:in
'block in each'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler/spec_set.rb:12:in
'each'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler/spec_set.rb:12:in
'each'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler/runtime.rb:17:in
'setup'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler.rb:100:in
'setup'
from C:/Ruby192/shovell/config/boot.rb:8:in '<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in 'require'
from <internal:lib/rubygems/custom_require>:29:in 'require'
from C:/Ruby192/shovell/config/application.rb:1:in '<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in 'require'
from <internal:lib/rubygems/custom_require>:29:in 'require'
from C:/Ruby192/shovell/config/environment.rb:2:in '<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in 'require'
from <internal:lib/rubygems/custom_require>:29:in 'require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/rails.rb:147:in
'rails'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:116:in
'block (2 levels) in run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:149:in
'call'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:149:in
'listener'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:102:in
'block in run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:50:in
'call'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:50:in
'initialize'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:86:in
'new'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:86:in
'run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/command.rb:210:in
'run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:282:in
'<top (required)>'
from C:/Ruby192/bin/mongrel_rails:19:in 'load'
from C:/Ruby192/bin/mongrel_rails:19:in '<main>'` 我最好的猜测是C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0.rc.6/lib/bundler/runtime.rb:27:in 'block in setup': You have already activated mongrel 1.2. 0.pre2, but your Gemfile requires mongrel 1.1.5. Consider using bundle exec.是关键，但我还没能解决它。
我非常感谢任何人的帮助，这样我才能真正开始学习这门语言！
编辑：多亏了@duddle我才能解决上面的问题，但现在我有了另一个问题...我得到了这个错误：
C:\Ruby192\shovell>mongrel_rails start
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment... C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.0.rc2/lib/active_support/dependencies.rb:239:in
'req uire': no such file to load -- dispatcher (LoadError)
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.0.rc2/lib/active_support/dependencies.rb:239:in 'block in require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.0.rc2/lib/active_support/dependencies.rb:225:in 'block in load_dependency'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.0.rc2/lib/active_support/dependencies.rb:591:in 'new_constants_in'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.0.rc2/lib/active_support/dependencies.rb:225:in 'load_dependency'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.0.rc2/lib/active_support/dependencies.rb:239:in 'require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/rails.rb:148:in 'rails'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:116:in' block (2 levels) in run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:149:in 'call'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:149:in 'listener'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:102:in' block in run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:50:in 'call'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/configurator.rb:50:in 'initialize'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:86:in 'new'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:86:in'run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/lib/mongrel/command.rb:210:in 'run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mongrel-1.2.0.pre2-x86-mingw32/bin/mongrel_rails:282:in '<top (required)>'
from C:/Ruby192/bin/mongrel_rails:19:in 'load'
from C:/Ruby192/bin/mongrel_rails:19:in '<main>在这一点上，我最好的猜测(1am...very疲劳)是我丢失了一个文件，或者没有命名，因为它应该be..maybe我需要在我的Gemfile..maybe中使用:require操作，我只需要在它上面睡觉。哈哈。
再次感谢@duddle帮我度过了第一个错误！如有更多帮助，我们将不胜感激！
回答 6
Stack Overflow用户
发布于 2010-10-26 14:11:47
您已经激活了Mongrel1.2。0.pre2，但是你的Gemfile需要mongrel 1.1.5。考虑使用捆绑包exec。是关键，但我一直没能解决它。
你就快到了！
gem 'mongrel', '>= 1.2.0.pre2'第二个参数告诉bundler要求版本大于或等于1.2.0.pre2，在使用Ruby 1.9.2时必须使用该版本。
Bundler页面提供了关于如何使用Gemfile的一个很好的参考：http://gembundler.com/gemfile.html
Stack Overflow用户
发布于 2010-12-07 04:28:34
以防你没弄明白。
我运行了gem install 'dispatcher‘，并在我的应用程序的Gemfile中添加了gem 'dispatcher’。然后一切都好了。
从我使用ruby的小经验来看，每次我都遇到“需要--没有这样的文件要加载”的问题。这是因为我错过了一个特定的宝石。
哈..。
Stack Overflow用户
发布于 2011-02-01 20:43:53
将下面这一行添加到gem文件：
gem 'mongrel', '>= 1.2.0.pre2'在命令提示符下：
运行bundle install
使用以下命令启动mongrel：
rails serverhttps://stackoverflow.com/questions/4020309
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