In case of using the RadRails IDE on WindowsXP with mysql. If yougot an error message like this 'uninnitialize constant Mysql' whencommand with 'ruby script/generate scaffold Xxxx'.

I don't know exactly why occured this type of error.

To fix it, you must do the following:

1. Goto your mysql home\bin directory : C:\mysql\bin

2. There is only one DLL file. File name is libmySQL.dll.

3. Copy libmySQL.dll file to C:\Windows directory.

All done. Happy Rails ~~