无法使用中间件将用户名添加到日志记录

Question

我正在尝试记录（默认情况下）username 和 project（可以从 request 对象决定）。我不想手动将 context 添加到每个日志。

问题是我无法让 Django 添加 request 或直接 username 和 project 到 LogRecord。我试了几十种方法

这是我的代码：

middlewares.py

import threading
local = threading.local()

class LoggingRequestMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        # One-time configuration and initialization.

    def __call__(self, request):
        # Code to be executed for each request before
        # the view (and later middleware) are called.
        setattr(local, 'request', request)
        response = self.get_response(request)

        # Code to be executed for each request/response after
        # the view is called.

        return response

settings.py

def add_username_to_log(record):
local = threading.local()
record.username = '-'
request = getattr(local,'request',None)
print(request)

return True

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': LOGGING_VERBOSE_FORMAT,
            'style': '{',
        },
    },
    'filters': {
        'context_filter': {
            '()': 'django.utils.log.CallbackFilter',
            'callback': add_username_to_log,
        },

    },
    'handlers': {
        'console': {
            'level': DEFAULT_LOG_LEVEL,
            'class': 'logging.StreamHandler',
            'formatter': 'verbose',
            'filters': ['context_filter'],
        },
        'file_main': {
            'level': DEFAULT_LOG_LEVEL,
            'class': 'logging.handlers.RotatingFileHandler',
            'filename': os.path.join(LOG_PATH, 'main.log'),
            'maxBytes': DEFAULT_LOG_SIZE,
            'formatter': 'verbose',
            'filters': ['context_filter'],
            'backupCount': 0,
        },

    },
    'loggers': {
        '': {
            'handlers': ['file_main'],
            'level': DEFAULT_LOG_LEVEL,
            'propagate': False,
        },

    },
}

但是 request 对象始终是 None。你知道为什么吗？

Answer 1

threading.local() returns每次一个新对象，你必须读取和写入同一个对象。

locals_a = threading.local()
locals_a.foo = 1
hasattr(locals_a, 'foo')  # True
locals_b = threading.local()
hasattr(locals_b, 'foo')  # False

您需要在 1 个地方定义您的 locals 对象，然后您可以在任何需要访问请求并每次读取和写入该对象的地方导入。作为一个基本示例，这应该有效

def add_username_to_log(record):
    from middleware import local
    request = getattr(local,'request',None)

无法使用中间件将用户名添加到日志记录

Can't add username to logging record using Middleware

python

django

logging

django-logging