最后在Windows 64位中安装了MySQL for Rails，现在
环境：
Windows 7 64bit (Home Premium) Ruby 1.9.2 p290 (2011-07-09) [i386-mingw32] Rails 3.0.10 MySQL 5.5 Ruby，尽管我已经成功安装了mysql2 rubygem，但是当我调用需要它的rails命令时，我认为缺少gem。
在晚上获得在Windows 64位上安装mysql rubygem之后，我决定（最终）开始将mysql链接到本地rails服务器。 这就是我试图这样做的方式……
（相当）来自cmd.exe精确抄本
C:\rails\cookbook>gem install mysql --platform=ruby -- --with-mysql-include=c:\mysql\include --with-mysql-lib=c:\mysql\lib Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... Successfully installed mysql-2.8.1 1 gem installed Installing ri documentation for mysql-2.8.1... Installing RDoc documentation for mysql-2.8.1... (I thought this was successful mysql install, should I test it somehow?) C:\>gem install mysql2 --platform=ruby -- --with-mysql-include=c:\mysql\include --with-mysql-lib=c:\mysql\lib Fetching: mysql2-0.3.7.gem (100%) Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... Successfully installed mysql2-0.3.7 1 gem installed Installing ri documentation for mysql2-0.3.7... Enclosing class/module 'mMysql2' for class Client not known Installing RDoc documentation for mysql2-0.3.7... Enclosing class/module 'mMysql2' for class Client not known (Same as above - I thought this was successful mysql install) C:\rails>rails new cookbook -d mysql (successfully creates directories for project in c:\rails\cookbook) C:\rails\cookbook>rails server ?[31mCould not find gem 'mysql2 (~> 0.2.11)' in any of the gem sources listed in your Gemfile.?[0m ?[33mRun `bundle install` to install missing gems.?[0m
注意：我注意到它想要rubygem mysql2-0.2.11 ，我有0.3.7 。 我尝试通过上面安装两个gem的方法专门安装0.2.11 。 没有骰子，它在’任何存储库’中找不到名为mysql2-0.2.11的gem
我很难过，任何想法（和女孩）？
我相信你的MySQL安装是64位（比如Windows），对吗？
Ruby是32位，所以你不能将32位与64位连接起来 。
我发布了一篇文章，介绍了我博客上的安装步骤：
http://blog.mmediasys.com/2011/07/07/installing-mysql-on-windows-7-x64-and-using-ruby-with-it/
这些步骤使用MySQL Connector / C来解决32位与64位问题。
mysql或mysql2 gem都应该可以使用它。
你有没有在你的Gemfile包含mysql2并随后执行了bundle install ？
@@我的sql安装（64位架构）
下载连接器（下载zip文件并将其解压缩到c盘）
http://dev.mysql.com/downloads/connector/c/
下载mysql
http://dev.mysql.com/downloads/installer/5.6.html
命令用连接器安装mysql
C:\Sites\rails_project\resume>gem install mysql --platform=ruby -- --with-mysql- dir=C:/mysql-connector-c-6.1.0-win32
从连接器文件夹复制libmysql.dll并将其粘贴到ruby> bin文件夹之后