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Print stacktrace without raising and Exception in Ruby and/or Rails
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stacktrace.md

Print a stacktrace in Ruby or Rails without raising an exception

Why

You know what method is being and you want to figure out how it got there. Raising an exception is a bit harsh since all you want is a stack trace

How

puts caller

Seriously. It's that easy. If you're getting too much information you could

puts caller[0..2]

Since caller is just an array of strings.

@dchersey
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dchersey commented Aug 11, 2016 •
edited

Amazing. So simple, so hard to find out how to do this by googling!
This is saving my hair follicles (what's left of them) as I am using rubymotion for IOS which sadly lacks an effective debugger.
I've been putting logging all over the place to find out where things are being called repeatedly; all I needed to do was

mp caller

(mp is short for motion-print which is better than puts in rubymotion).

And of course in plain ruby, I would just use byebug and get the full debugging experience.

@alexmiddeleer
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alexmiddeleer commented Aug 31, 2018 •
edited

❤️ Luckily this is now the first result in google for ruby put stack.

@mddoor
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mddoor commented Apr 21, 2021

excellent

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