Question

在Windows 7和Windows上安装ruby 1.9.2p290（使用rubyInstaller）之后将MySQL连接到它（我检查了它它工作了）我安装了rails然后我在

上创建了一个项目

“C：\用户\ Amiref \文件\网站\ simple_cms”

用这个命令：“rails new simple_cms -d mysql” 然后，当我使用“rails server”运行webrick时，我看到了这个错误命令提示符：

"rails.bat :
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in
`require': Incorrect MySQL client library version! This gem was compile
d for 6.0.0 but the client library is 5.1.45. (RuntimeError)
At line:1 char:6
+ rails <<<<  server
+ CategoryInfo          : NotSpecified: (C:/Ruby192/lib/...
(RuntimeError):String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError

from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in
`<top (required)>'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2.rb:9:in
`require'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2.rb:9:in
`<top (required)>'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in
`require'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in
`block (2 levels) in require'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in
`each'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in
`block in require'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in
`each'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in
`require'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler.rb:122:in
`require'
from
C:/Users/Amiref/Documents/Sites/simple_cms/config/application.rb:7:in
`<top (required)>'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:52:in
`require'
 from
 C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:52:in
`block in <top (required)>'
 from
 C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:49:in
 `tap'
from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:49:in
`<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
"

Answer 1

最新的rails或ruby使用mysql-connector-c-6（libmysql.dll）编译mysql2-0.3.11-x86-mingw32，所以你应该使用6个客户端dll。

有一种简单的方法可以让RailsInstaller（Ruby1.9.2）使用mysql-connector-c-6：

下载mysql-connector-c-noinstall-6.0.2-win32.zip
将mysql-connector-c-noinstall-6.0.2-win32.zip和copu mysql-connector-c-noinstall-6.0.2-win32 \ lib \ libmysql.dll解压缩到RailsInstaller \ Ruby1.9.2 \ bin < / LI>
然后运行rails服务器，一切正常。

Answer 2

阅读错误消息。您的MySQL gem需要版本6.0.0，但您已安装5.1.45。

Answer 3

这是因为在您的项目中使用了gem（可能是mysql或mysql2），并且该gem的二进制文件是针对与您安装的版本不同的MySQL版本编译的。

mysql和mysql2 gems都取决于你在PATH中拥有libmysql.dll库，这可能与用于构建这些宝石的库不同。

你最有可能使用Bundler来安装这些宝石，这会扼杀安装说明，了解在哪里获得特定版本的libmysql.dll

我建议您删除已安装在PATH中某处的libmysql.dll上安装的mysql，mysql2 gems，并按照此处所述的说明进行操作：

http://blog.mmediasys.com/2011/07/07/installing-mysql-on-windows-7-x64-and-using-ruby-with-it/

您可以跳过MySQL本身的安装，但要注意MySQL Connector / C二进制文件的使用（zip存档，而不是安装程序）以及如何安装它。

一旦你完成了mysql或mysql2 gem的安装（安装说明适用于两者），请更新你的软件包：

bundle check

因此它反映了本地安装的版本。

希望有所帮助。

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