Django: how to set log level to INFO or DEBUG

Question

I tried to change the debug level to DEBUG in Django because I want to add some debug messages to my code. It seems to have no effect.

My logging configuration:

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

Code:

import logging ; logger = logging.getLogger(__name__)
logger.debug("THIS MESSAGE IS NOT SHOWN IN THE LOGS")
logger.warn("THIS ONE IS")

Output on the console:

WARNING:core.handlers:THIS ONE IS

I also have tried setting DEBUG = False and DEBUG = True in my settings file. Any ideas?

Edit: If I set the log level on the logger directly, it works:

import logging ; logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
logger.debug("THIS MESSAGE IS NOT SHOWN IN THE LOGS")

Output:

DEBUG:core.handlers:THIS MESSAGE IS NOT SHOWN IN THE LOGS
WARNING:core.handlers:THIS ONE IS

But: It seems the config file is totally ignored. It prints both statements always even if I set both entries in the config back to ERROR. Is this the correct behaviour or am I still missing something?

Answer 1

You need to add eg

'core.handlers': {
    'level': 'DEBUG',
    'handlers': ['console']
}

in parallel with the django.request entry, or

'root': {
    'level': 'DEBUG',
    'handlers': ['console']
}

in parallel with the 'loggers' entry. This will ensure that the level is set on the logger you are actually using, rather than just the django.request logger.

Update: To show messages for all your modules, just add entries alongside django.request to include your top level modules, eg api , handlers , core or whatever. Since you haven't said exactly what your package/module hierarchy is, I can't be more specific.

Answer 2

I fixed it by changing

LOGGING = {
    ...
}

to:

logging.config.dictConfig({
    ...
})

For example to log all messages to the console:

import logging.config
LOGGING_CONFIG = None
logging.config.dictConfig({
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'console': {
            # exact format is not important, this is the minimum information
            'format': '%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
        },
    },
    'handlers': {
        'console': {
            'class': 'logging.StreamHandler',
            'formatter': 'console',
        },
    },
    'loggers': {
    # root logger
        '': {
            'level': 'DEBUG',
            'handlers': ['console'],
        },
    },
})