How do I log the entire trace back of a Ruby exception using the default Rails logger?
Solution 1
logger.error $!.backtrace
Also, don't forget you can
rescue ErrorType => error_name
to give your error a variable name other than the default $!
.
Solution 2
The way rails does it is
137 logger.fatal(
138 "\n\n#{exception.class} (#{exception.message}):\n " +
139 clean_backtrace(exception).join("\n ") +
140 "\n\n"
141 )
248 def clean_backtrace(exception)
249 if backtrace = exception.backtrace
250 if defined?(RAILS_ROOT)
251 backtrace.map { |line| line.sub RAILS_ROOT, '' }
252 else
253 backtrace
254 end
255 end
256 end
Solution 3
In later versions of Rails, simply uncomment the following line in RAIL_ROOT/config/initializers/backtrace_silencers.rb (or add this file itself if it's not there):
# Rails.backtrace_cleaner.remove_silencers!
This way you get the full backtrace written to the log on an exception. This works for me in v2.3.4.
Solution 4
logger.error caller.join("\n")
should do the trick.
Solution 5
In Rails, ActionController::Rescue
deals with it. In my application controller actions, i'm using method log_error
from this module to pretty-format backtrace in logs:
def foo_action
# break something in here
rescue
log_error($!)
# call firemen
end
Comments
-
thedeepfield almost 4 years
I am working on rails project and I am trying to get exceptions to be logged to the rails log files. I know I can call
logger.error $!
to get the first line of the exception logged to the file. But, I want to get the entire trace stack logged as well. How do I log the entire trace back of an exception using the default rails logger? -
Ashburton88 about 12 yearsAm I missing something? logger.error only takes a single argument, so that code does not work...
-
Jonas Fagundes about 12 yearsThis one doesn't work, use
logger.error e.message + "\n " + e.backtrace.join("\n ")
instead. -
Ian Terrell about 12 yearsI could swear the multiple parameters worked 4 years ago, but maybe it didn't. I've updated it to just log the backtrace, which seems to be the most relevant aspect of the question; I trust the reader can figure out multiple logger calls are possible, ditto for string concatenation (or more Ruby-y, interpolation).
-
Rob almost 12 yearsIt's part of the documentation for Rails 3.2.3. See here: api.rubyonrails.org/classes/ActiveSupport/BacktraceCleaner.html
-
James almost 10 yearsdon't do join('\n') single quotes :p