如何在Django日志文件中记录Python警告？ [英] How to log Python warnings in a Django log file?

问题描述

我有一个Django应用程序，正在从v1.8迁移到v1.10。在执行此工作的过程中，我通过以下方式运行了应用程序：

I have a Django application that I am migrating from v1.8 to v1.10. In the process of doing this work, I ran my application via:

python -Wall manage.py runserver

这样做会在控制台中显示许多Python警告。我想在我的Django应用程序日志中显示这些警告，以便稍后进行检查。我以为我的应用程序的日志处理程序会捕获这些警告，但事实并非如此。日志处理程序如下所示（取自settings.py）：

Doing so causes a number of Python warnings to appear in my console. I'd like to have these warnings show up in my Django application log, so I can examine them later. I thought my application's log handler would catch these warnings, but it doesn't. The log handler looks like the following (as taken from settings.py):

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': "[%(asctime)s] %(levelname)s [%(name)s:%(lineno)s] %(message)s",
            'datefmt': "%d/%b/%Y %H:%M:%S"
        },
        'simple': {
            'format': '%(levelname)s %(message)s'
        },
    },
    'handlers': {
        'file': {
            'level': 'WARNING',
            'class': 'logging.FileHandler',
            'filename': 'myapp.log',
            'formatter': 'verbose'
        },
    },
    'loggers': {
        'django': {
            'handlers': ['file'],
            'propagate': True,
            'level': 'WARNING',
        },
        'myapp': {
            'handlers': ['file'],
            'level': 'WARNING',
        },
    }
}

如何我在Django日志中捕获了Python警告（使用 -Wall ）供以后检查？

How can I capture Python warnings (with -Wall) in my Django log for examination later?

推荐答案

python -Wall manage.py< command> 中显示的警告是使用警告模块生成的。在Python2.7日志记录模块文档中，它们有一节显示如何将来自警告模块的消息集成到日志记录中。

The warnings shown in python -Wall manage.py <command> are generated using warnings module. In Python2.7 logging module documentation, they have a section showing how to integrate messages from warnings module to logging.

将这些消息添加到设置文件中。

Add these to your settings file.

import logging
logging.captureWarnings(True)

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': "[%(asctime)s] %(levelname)s [%(name)s:%(lineno)s] %(message)s",
            'datefmt': "%d/%b/%Y %H:%M:%S"
        },
        'simple': {
            'format': '%(levelname)s %(message)s'
        },
    },
    'handlers': {
        'file': {
            'level': 'WARNING',
            'class': 'logging.FileHandler',
            'filename': 'myapp.log',
            'formatter': 'verbose'
        },
    },
    'loggers': {
        'django': {
            'handlers': ['file'],
            'propagate': True,
            'level': 'WARNING',
        },
        'myapp': {
            'handlers': ['file'],
            'level': 'WARNING',
        },
        'py.warnings': {
            'handlers': ['file'],
            'level': 'WARNING',
            'propagate': True
        }
    }
}

之后添加它，尝试运行任何 manage.py 命令，您会看到写在 myapp.log 文件中的警告

After adding it, try to run any manage.py command and you can see the warnings written to your myapp.log file.

此行指示日志记录以捕获py.warnings 警告：

This line instructs logging to capture the py.warnings warnings:

    logging.captureWarnings(True)

此命令指示日志记录路由（在此示例中，是来自py.warnings记录器的 file 处理程序）警告：

This instructs logging to route (in this example to the file handler) warnings from the py.warnings logger:

    'py.warnings': {
        'handlers': ['file'],
        'level': 'WARNING',
        'propagate': True
    }

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