实用的 django logging 配置

django_log_settings.py

"""
参考: [Django logging settings](http://www.lexev.org/en/2013/django-logging-settings/)
代码: https://gist.github.com/st4lk/6725777

修改内容:

* formatters: 分成 default_formatter, debug_formatter
* NullHandler:  采用 logging 模块的 NullHandler
* 格式中增加毫秒数: %(msecs)s
* 增加 django.db.backends 的配置，把 SQL 记录在日志文件里面
"""
# Logging settings for django projects, works with django 1.5+
# If DEBUG=True, all logs (including django logs) will be
# written to console and to debug_file.
# If DEBUG=False, logs with level INFO or higher will be
# saved to production_file.
# Logging usage:

# import logging
# logger = logging.getLogger(__name__)
# logger.info("Log this message")

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse'
        },
        'require_debug_true': {
            '()': 'django.utils.log.RequireDebugTrue'
        }
    },
    'formatters': {
        'default_formatter': {
            'format': '%(asctime)s.%(msecs)03d - %(levelname)s - %(name)s - %(message)s',
            'datefmt': "%Y-%m-%d %H:%M:%S",
        },
        'debug_formatter': {
            'format': '%(asctime)s.%(msecs)03d - %(levelname)s - %(name)s - %(message)s '
                      '(%(filename)s:%(lineno)d)',
            'datefmt': "%Y-%m-%d %H:%M:%S",
        },
    },
    'handlers': {
        'mail_admins': {
            'level': 'ERROR',
            'filters': ['require_debug_false'],
            'class': 'django.utils.log.AdminEmailHandler'
        },
        'console': {
            'level': 'DEBUG',
            'filters': ['require_debug_true'],
            'class': 'logging.StreamHandler',
            'formatter': 'debug_formatter',
        },
        'production_file': {
            'level': 'INFO',
            'class': 'logging.handlers.RotatingFileHandler',
            'filename': 'logs/main.log',
            'maxBytes': 1024 * 1024 * 5,  # 5 MB
            'backupCount': 7,
            'formatter': 'default_formatter',
            'filters': ['require_debug_false'],
        },
        'debug_file': {
            'level': 'DEBUG',
            'class': 'logging.handlers.TimedRotatingFileHandler',
            'filename': 'logs/main_debug.log',
            'when': 'h',
            'backupCount': 48,
            'formatter': 'debug_formatter',
            'filters': ['require_debug_true'],
        },
        'null': {
            "class": 'logging.NullHandler',
        }
    },
    'loggers': {
        'django.request': {
            'handlers': ['mail_admins', 'console'],
            'level': 'ERROR',
            'propagate': True,
        },
        'django.db.backends': {
            'handlers': ['debug_file'],
            'level': 'DEBUG',
            'propagate': False,
        },
        '': {
            'handlers': ['console', 'production_file', 'debug_file'],
            'level': "DEBUG",
        },
    }
}