dr_dre - diagnose Double Render Errors in Rails apps

dr_dre intercepts calls to render and redirect in ActionController and, if it detects multiple calls to render or redirect (triggering a DoubleRenderError), will drop a couple of lines into the output log identifying where the redirect or render calls were made from.

It will also push a custom DoubleRenderError exception.

Just use the gem and include DrDre in any controllers you want to monitor.