安装了MYSQL作为开发机器的Windows XP，ruby 1.9.2p290（2011-07-09）[i386-mingw32]，Rails 3.1.0 gem install mysql2 - ＆＃39; - with-mysql-lib =＆＃34; c：\ Program Files \ MySQL \ MySQL S erver 5.5 \ lib＆＃34; --with-mysql -include =＆＃34; c：\ Program Files \ MySQL \ MySQL Server 5.5 \ inc 路得＆＃34;＆＃39; （成功安装了gem mysql2） rails new talk -d mysql（成功创建了一个名为talk的新rails应用程序）
问题现在开始：
C：\ Sites \ RP \ talk＆gt; rails生成用户
错误信息：
ruby.exe - 无法找到组件
此应用程序无法启动，因为找不到libmysql.dll。重新安装应用程序可能会解决此问题。
命令行错误消息：
C：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/mysql2-0.3.10/lib/mysql2.rb
：9：require': 126: The specified module could not be found. - C:/RailsInsta
ller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/mysql2-0.3.10/lib/mysql2/mysql2.so (Load
Error)
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/mysql2-0.3.10/
lib/mysql2.rb:9:in＆＃39;
来自C：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler/runtime.rb:68:in require'
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler/runtime.rb:68:in块（2级）in require＆＃39;
来自C：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler/runtime.rb:66:in each'
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler/runtime.rb:66:in阻止了需要＆＃39;
来自C：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler/runtime.rb:55:in each'
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler/runtime.rb:55:in要求＆＃39;
来自C：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18
/lib/bundler.rb:120:in require'
from C:/Sites/RP/talk/config/application.rb:9:in＆＃39;
来自C：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0
/lib/rails/commands.rb:21:in require'
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0
/lib/rails/commands.rb:21:in＆＃39;
来自script / rails：6：require'
from script/rails:6:in＆＃39;
答案 0 :(得分：1)
http://www.ruby-forum.com/topic/150580有答案。出于某种原因，我需要：
1 / gem install mysql 2 /从/ MYSQL / MySQL Server 5.5 / lib复制libmysql.dll文件并将其粘贴到Ruby1.9.2 / bin
之后，一帆风顺......即使我这样做了，如果有人能够深入了解背后的原因，我将不胜感激：
答案 1 :(得分：0)
在Windows上应该有一个LIB环境变量。您是否已检查以确保已将libmysql的路径添加到此？我怀疑它没有。