Django Writing To Error Log
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quick logging primer¶ Django uses Python's builtin logging module to perform system logging. The usage of this module is discussed in detail in Python's own documentation. However, if django 500 error log you've never used Python's logging framework (or even if you have), here's a
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quick primer. The cast of players¶ A Python logging configuration consists of four parts: Loggers Handlers Filters Formatters Loggers¶ django apache error log A logger is the entry point into the logging system. Each logger is a named bucket to which messages can be written for processing. A logger is configured to have a
Django Server Error Log
log level. This log level describes the severity of the messages that the logger will handle. Python defines the following log levels: DEBUG: Low level system information for debugging purposes INFO: General system information WARNING: Information describing a minor problem that has occurred. ERROR: Information describing a major problem that has occurred. CRITICAL: Information describing a critical problem that django console log has occurred. Each message that is written to the logger is a Log Record. Each log record also has a log level indicating the severity of that specific message. A log record can also contain useful metadata that describes the event that is being logged. This can include details such as a stack trace or an error code. When a message is given to the logger, the log level of the message is compared to the log level of the logger. If the log level of the message meets or exceeds the log level of the logger itself, the message will undergo further processing. If it doesn't, the message will be ignored. Once a logger has determined that a message needs to be processed, it is passed to a Handler. Handlers¶ The handler is the engine that determines what happens to each message in a logger. It describes a particular logging behavior, such as writing a message to the screen, to a file, or to a network socket. Like loggers, handlers also have a log level. If the log level of a log record doesn't meet or exceed
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Python Write To Error Log
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Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like django log file location you, helping each other. Join them; it only takes a minute: Sign up Python/Django: log to console under runserver, log to file under Apache up vote 77 down vote favorite 27 How can I send trace messages https://docs.djangoproject.com/en/1.10/topics/logging/ to the console (like print) when I'm running my Django app under manage.py runserver, but have those messages sent to a log file when I'm running the app under Apache? I reviewed Django logging and although I was impressed with its flexibility and configurability for advanced uses, I'm still stumped with how to handle my simple use-case. python django logging share|improve this question edited Sep 2 '15 at 18:11 Michael Currie 3,00421633 asked Dec 29 http://stackoverflow.com/questions/4558879/python-django-log-to-console-under-runserver-log-to-file-under-apache '10 at 23:44 Justin Grant 30.4k688139 1 Simplest solution is to have different settings.py files for main server and development environment, see deploydjango.com/django_project_structure –Alex Jul 30 '13 at 10:51 add a comment| 6 Answers 6 active oldest votes up vote 61 down vote accepted Text printed to stderr will show up in httpd's error log when running under mod_wsgi. You can either use print directly, or use logging instead. print >>sys.stderr, 'Goodbye, cruel world!' share|improve this answer answered Dec 29 '10 at 23:48 Ignacio Vazquez-Abrams 444k63794953 1 It's technically not valid WSGI though, and will trigger errors in more strict environments. –Paul McMillan Jan 13 '11 at 9:21 9 There is nothing whatsoever wrong with using 'print' with 'sys.stderr' as far as WSGI goes and it should not trigger errors. –Graham Dumpleton Apr 15 '12 at 3:01 add a comment| up vote 76 down vote Here's a Django logging-based solution. It uses the DEBUG setting rather than actually checking whether or not you're running the development server, but if you find a better way to check for that it should be easy to adapt. LOGGING = { 'version': 1, 'formatters': { 'verbose': { 'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s' }, 'simple': { 'format': '%(levelname)s %(message)s' }, }, 'handlers': { 'console': { 'level': 'DEBUG', 'class': 'logging.StreamHandler', 'formatter': 'simple' }, 'file':
log errors to stderr? Why can't I see Django exceptions in the console? How do I get Django to log exceptions? How to http://www.obeythetestinggoat.com/how-to-log-exceptions-to-stderr-in-django.html print debug messages in Django? I know they're common because I've often found asking myself some kind of variant on these questions, at some point or other. Then I saw that, in Django 1.6/1.7, the default logging configuration actually does send logging messages to the console So does this mean that exceptions in Django are going to start appearing in the console then? No. Just because you error log wish for it doesn't make it so I think my own difficulties with this issue stemmed from the fact that, obviously, in my mind, the thing you'd want to log would be exceptions, and that, since Django will show us a clever debug page (if DEBUG is True), or a standard server 500 page, then I sort of assumed it would log that exception as well. to error log But it doesn't The reason I struggled with this because I wasn't clear on the fact that there are actually two systems involved here: Django's logging system (based on the Python logging module) Django's exception handling layer (middleware) By default (as of Django 1.6), Django is configured to send logging messages to the console. There are two gotchas however: Django's default logging level is set to WARNING, which means any attempt to use logging.debug or logging.info will fail Django has a middleware layer that automatically catches exceptions, and handles them differently depending on whether you have DEBUG = True or not, but it doesn't explicitly log them. Unit testing Django's logging config (if you want) This is a blog about TDD, so let's write a test first. It works by monkey-patching in an extra view function into the project's url config (mwahahaha). The view then tries to do various calls to, eg, logging.debug, just we'd like to be able to in our real views. Finally it explodes with an exception, so we can test whether any information about the exception ends up in the logs We mock out sys.stderr to pick up on what was actually sent t