Django logging of custom management commands

Question

I have an app named main in my Django project. This app has a several management commands that I want to log, but nothing is showing up in stdout with the following configuration:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'log_to_stdout': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'stream': sys.stdout,
            },
        },
    'loggers': {
        'main': {
            'handlers': ['log_to_stdout'],
            'level': 'DEBUG',
            'propagate': True,
            }
        }
    }

What am I doing wrong? I've tried using my_project.main as well, but that didn't work either. I'm using 1.3.0 final.

I've tried logging.info and logging.debug, but neither of them work. After writing this question, I noticed that logging.warn does give me a print to stdout. — damd
– damd, Commented Mar 9, 2012 at 14:23
Sounds like your log level isn't being set properly. Try something like this reinout.vanrees.org/weblog/2017/03/08/… if you want to tie it to the verbosity flag. — DylanYoung
– DylanYoung, Commented Dec 4, 2019 at 16:35
For others who may be reading this... The root logger defaults to the "warning" level, so likely the logger being used was propagating to the root logger (or was the root logger) and not the "main" one being declared here. — Tim Tisdall
– Tim Tisdall, Commented Dec 20, 2021 at 14:37

second · Accepted Answer · 2012-03-09 14:27:25Z

23

you need to namespace your logger. currently you are logging to the root logger, which isn't caught by your handler, which is looking for main

rather than logging.debug("message"), you want

logger = logging.getLogger('main')
logger.debug("message")

answered Mar 9, 2012 at 14:27

second

28.8k8 gold badges80 silver badges77 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

jpic · Accepted Answer · 2012-03-09 11:13:24Z

4

Setting "stream" to sys.stdout is not necessary. However, you should define a formatter:

Example:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'simple': {
            'format': '%(levelname)s %(message)s'
        },
    },
    'handlers': {
        'log_to_stdout': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'simple',
            },
        },
    'loggers': {
        'main': {
            'handlers': ['log_to_stdout'],
            'level': 'DEBUG',
            'propagate': True,
        }
    }
}

answered Mar 9, 2012 at 11:13

jpic

33.5k5 gold badges114 silver badges114 bronze badges

1 Comment

damd Over a year ago

I tried by copy-pasting your example code verbatim but still, I get nothing to stdout. However, when I insert logging.warn('foo') as the first statement, I do get a print in stdout. logging.info and logging.debug still don't work.

patrickn · Accepted Answer · 2012-03-09 13:23:10Z

-5

If you are enrolling these custom commands with cron, you can "force" logging by just redirecting output to a text file.

* 12 * * * python /path/to/my/custom/command.py >> /path/to/my/logfile.txt

This will run a cron job at 12am every morning, and anything directed to stdout (like python print statements) will be dumped into this text file, concatenated on any existing text in the logfile.

If you're not using cron, just create a single shell script that runs all the scripts you need to run and manually direct them to the logfiles you want.

python /path/to/my/custom/command.py >> /path/to/my/logfile.txt

...and so on.

answered Mar 9, 2012 at 13:23

patrickn

2,5895 gold badges23 silver badges21 bronze badges

2 Comments

damd Over a year ago

Thanks, but this is the method I used before. I'm trying to do the right thing and use Django's "built-in" logging capabilities if possible.

patrickn Over a year ago

Fair enough. Hopefully someone will step in and help you with this; I'm primitive and use shell redirection. :)

Collectives™ on Stack Overflow

Django logging of custom management commands

3 Answers 3

Comments

1 Comment

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related