Created
May 4, 2013 00:49
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Django logging config to dump a stack trace for every ORM query, so you can find the code that is producing queries that are icky.
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DEBUG=True | |
LOG_FILE_SIZE=1024*1000 | |
LOGGING = { | |
'version' : 1, | |
'disable_existing_loggers':True, | |
'formatters' : { | |
'simple' : { | |
'format' : '%(levelname)s %(name)s %(message)s' | |
}, | |
'errors' : { | |
'format' : '%(levelname)s %(asctime)s %(name)s %(message)s \n View: %(view)s \n Login_id: %(login_id)s \n GET:\n%(parameters)s' | |
}, | |
'precise' : { | |
'format' : '%(levelname)s %(asctime)s %(name)s %(message)s' | |
}, | |
'timing': { | |
'format' : '%(asctime)-15s %(message)s' | |
}, | |
'sourcetrace': { | |
'format': '-'*80 + '\n%(sql)s\n\nStacktrace of SQL query producer:\n%(sourcetrace)s' + '-'*80 + '\n' | |
}, | |
}, | |
'handlers' : { | |
'null' : { | |
'level' : 'DEBUG', | |
'class' : 'django.utils.log.NullHandler' | |
}, | |
'console' : { 'class' : 'logging.StreamHandler' , 'formatter' : 'simple'}, | |
'timing-file' : { 'class' : 'logging.handlers.RotatingFileHandler', | |
'filename' : 'api-timing.log', | |
'formatter' : 'timing', | |
'backupCount' : 10, | |
'maxBytes' : LOG_FILE_SIZE | |
}, | |
'django.db.sourcetrace': { | |
'class': 'logging.StreamHandler', | |
'formatter': 'sourcetrace' | |
}, | |
}, | |
'root' : { | |
'level' : 'DEBUG', | |
'handlers' : ['console'] | |
}, | |
'loggers' : { | |
'django': { | |
'handlers' : ['console'], | |
'propagate': False, | |
'level' : 'DEBUG' | |
}, | |
'timing': { | |
'propagate': False, | |
'level' : 'DEBUG', | |
'handlers' : ['timing-file'] | |
}, | |
'django.db.backends': { | |
'handlers': ['django.db.sourcetrace'], | |
'propagate': False, | |
'level': 'DEBUG' | |
} | |
} | |
} | |
import logging, inspect | |
class ContextFilter(logging.Filter): | |
""" | |
Injects stack trace information when added as a filter to a | |
python logger | |
""" | |
def filter(self, record): | |
source_trace = '' | |
stack = inspect.stack() | |
for s in reversed(stack): | |
line = s[2] | |
file = '/'.join(s[1].split('/')[-3:]) | |
calling_method = s[3] | |
source_trace += '%s in %s at %s\n' % (line, file, calling_method) | |
# pass to format string | |
record.sourcetrace = source_trace | |
# clean up | |
del stack | |
return True | |
django_db_backends_logger = logging.getLogger('django.db.backends') | |
f = ContextFilter() | |
django_db_backends_logger.addFilter(f) | |
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Damn, that's awesome, thanks!