Ask HN: How do you debug your rails applications?

I use the ruby-debug gem.

Quote from a co-worker: "If you need to use a debugger, your code is too complicated. :)"

I use the Netbeans IDE debugger. It can get hung and crash your rails app if you put breakpoints in certain places, but it's pretty good for simple debugging.

I also use Netbeans IDE. It works through a native gem and requires a specific version of the gem to work properly. Its a little funky, but I almost never need it.

I use unit tests and puts statements to debug most of the time. It can be faster than stepping through an actual debugger.

the ruby-debug gem has always worked for me.