Debug rails code in radrails

Hi
I would like to know how to debug rails code. I am using radrail
v0.7.2

Thanks in advance
Sijo

no matter what ide you’re using, you can always fall back to you good
old trusty console. but if your on radrails/aptana you can take a look
here:
http://aptana.tv/movies/jaxer/PlayQTFlash.html?movie=AptanaRadrailsRailsShell&width=975&height=750
http://www.aptana.com/docs/index.php/Fast_Rails_Debugging_using_Aptana_Rails_IDE