CODEWITHSUNDEEP
ruby
dancypants
dancypants

Reputation: 523

log partial exception stack trace in Ruby

To debug possible issues with some new method, I'd like to log the stack trace upon encountering a StandardError.

In my case the stack traces are extremely long and only the last few calls are of importance to me (to debug a possible issue, I need to know who was the caller).

Is there a way to log a truncated version of the stack trace association with the exception?

E.g.

def some_unreliable_method begin # do unreliable things rescue => e log( error_message: e.message, backtrace: e.backtrace # the full stack trace is too long ) # recover from exception end end

Upvotes: 2

Views: 557

Answers (2)

Alex Kojin
Alex Kojin

Reputation: 5204

e.backtrace is just array and you can get only last N numbers of backtrace's lines:

# get last 10 lines    
e.backtrace[0, 10].join("\n\t")

Upvotes: 4

Aetherus
Aetherus

Reputation: 8888

  1. Instead of log(error_message: e.message, backtrace: e.backtrace), just logger.error(e)

  2. If that's still too long, take a look at config/initializers/backtrace_silencers.rb. It's well documented.

Upvotes: 0

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