我正在开发Django应用(Django 2.0.7,Python 3.7,Windows 10,PyCharm),我需要编写一个自定义日志记录处理程序,以便将日志消息存储到数据库中。
尝试运行应用程序时出现此错误:
pydev debugger: process 27148 is connecting
Connected to pydev debugger (build 192.6817.19)
pydev debugger: process 28448 is connecting
Unhandled exception in thread started by <_pydev_bundle.pydev_monkey._NewThreadStartupWithTrace object at 0x000001F1C52AD648>
Traceback (most recent call last):
File "C:\Program Files\Python\lib\logging\config.py", line 387, in resolve
found = getattr(found, frag)
AttributeError: module 'Inmobiliaria.inmobiliaria.utils.logs' has no attribute 'handlers'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files\Python\lib\logging\config.py", line 562, in configure
handler = self.configure_handler(handlers[name])
File "C:\Program Files\Python\lib\logging\config.py", line 712, in configure_handler
klass = self.resolve(cname)
File "C:\Program Files\Python\lib\logging\config.py", line 389, in resolve
self.importer(used)
File "C:\Users\facun\Desktop\DEV\forreal\backend\Inmobiliaria\inmobiliaria\utils\logs\handlers.py", line 2, in <module>
from Inmobiliaria.inmobiliaria.services.application_log_services import create_application_log
File "C:\Users\facun\Desktop\DEV\forreal\backend\Inmobiliaria\inmobiliaria\services\application_log_services.py", line 1, in <module>
from Inmobiliaria.inmobiliaria.models import Applicationlog
File "C:\Users\facun\Desktop\DEV\forreal\backend\Inmobiliaria\inmobiliaria\models.py", line 9, in <module>
UserModel = get_user_model()
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\contrib\auth\__init__.py", line 194, in get_user_model
return django_apps.get_model(settings.AUTH_USER_MODEL, require_ready=False)
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\apps\registry.py", line 192, in get_model
self.check_apps_ready()
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\apps\registry.py", line 127, in check_apps_ready
raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Program Files\JetBrains\PyCharm 2019.2.2\helpers\pydev\_pydev_bundle\pydev_monkey.py", line 747, in __call__
ret = self.original_func(*self.args, **self.kwargs)
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\utils\autoreload.py", line 225, in wrapper
fn(*args, **kwargs)
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\core\management\commands\runserver.py", line 112, in inner_run
autoreload.raise_last_exception()
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\utils\autoreload.py", line 248, in raise_last_exception
raise _exception[1]
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\core\management\__init__.py", line 327, in execute
autoreload.check_errors(django.setup)()
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\utils\autoreload.py", line 225, in wrapper
fn(*args, **kwargs)
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\__init__.py", line 19, in setup
configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
File "C:\Users\facun\Envs\for-real\lib\site-packages\django\utils\log.py", line 73, in configure_logging
logging_config_func(logging_settings)
File "C:\Program Files\Python\lib\logging\config.py", line 799, in dictConfig
dictConfigClass(config).configure()
File "C:\Program Files\Python\lib\logging\config.py", line 570, in configure
'%r' % name) from e
ValueError: Unable to configure handler 'db_handler'
这是我到目前为止的代码:
---- settings.py(LOGGING字典的处理程序部分)----
'handlers': {
'debug_file': {
'level': 'DEBUG',
'class': 'logging.FileHandler',
'filename': 'Logs/DebugTest.log',
},
'info_file': {
'level': 'INFO',
'class': 'logging.handlers.RotatingFileHandler',
'maxBytes': 1024*1024*10, # 10MB
'backupCount': 10,
'filename': 'Logs/InfoTest.log',
'formatter': 'verbose',
},
'db_handler': {
'level': 'INFO',
'class': 'Inmobiliaria.inmobiliaria.utils.logs.handlers.DatabaseHandler',
'formatter': 'verbose',
},
},
---- handlers.py ----
import logging
from Inmobiliaria.inmobiliaria.services.application_log_services import create_application_log
class DatabaseHandler(logging.Handler):
"""
Logging handler that inserts log messages into the database
"""
def __init__(self):
logging.Handler.__init__(self)
def emit(self, record):
msg: logging.LogRecord = self.format(record)
ret_val = create_application_log(msg.msg, msg.levelname, msg.thread, msg.process, msg.filename, msg.lineno, msg.created)
print(ret_val)
此handlers.py文件位于
Inmobiliaria
inmobiliaria
utils
logs
handlers.py <-----
希望您能帮助我。
非常感谢!
此错误是由鸡和蛋问题引起的。如果我理解正确,则处理程序正在使用django模型登录数据库。所有django型号都需要先加载设置并初始化django应用,然后才能使用它们。但是必须先初始化日志记录,然后才能加载应用程序。为了解决此问题,您必须删除处理程序对模型的依赖,例如,在django模型外部创建一个连接并将其插入。另外,您可以尝试通过将模型的用法导入本地来延迟导入模型的用法。