how to log a file in Django

Question

I have this function in views.py ( related to contact form). I need to log all the inputs and output to a temporary file, but I don't know how to do it in django. A new error appears : No handlers could be found for logger "farah"

Settings.py:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'farah': {
            'level': 'DEBUG',
            'class': 'logging.FileHandler',
            'filename': '/home/farah/update/farah.log',
        },
    },
    'loggers': {
        'django': {
            'handlers': ['farah'],
            'level': 'DEBUG',
            'propagate': True,
        },
    },
}

The function in views.py : logger = logging.getLogger('farah') def contact(request):

form = FeedbackForm(request.POST or None)
   
    
if form.is_valid():
        
        recaptcha_response = request.POST.get('g-recaptcha-response')
        url = 'https://www.google.com/recaptcha/api/siteverify'
        values = {
            'secret': settings.GOOGLE_RECAPTCHA_SECRET_KEY,
            'response': recaptcha_response
        }
        data = urllib.urlencode(values).encode()
        req =  urllib2.Request(url, data=data)
        response = urllib2.urlopen(req)
        result = json.loads(response.read().decode())
        ''' End reCAPTCHA validation '''

        if result['success']:
    form.save()
    message = u'You have feedback\nName: %s\nEmail: %s\nPhone: %s\nCountry: %s\nFeedback:\n%s' % (
        self.cleaned_data.get['name'],
        self.cleaned_data.get['email'],
        self.cleaned_data.get['phone'],
        self.cleaned_data.get['country'],
        self.cleaned_data.get['feedback'])
    try:
        send_mail('NEW FEEDBACK', message, '', settings.DEFAULT_FROM_EMAIL) # to admin
        send_mail('THANK YOU for contacting us', 'We will be back to you promptly.', '', [self.cleaned_data.get['email'],]) # to user
        messages.info(request, 'SUCCESS! Your message has been sent!')
        form = FeedbackForm()
    except:
        messages.info(request, 'Sorry, can\'t send feedback right now.')
        else:
            messages.error(request, 'Invalid reCAPTCHA. Please try again.')

     
    else:
      form = FeedbackForm()
      logger.error('Log whatever you want') 
        
    

return render(request, 'contact.html', {'active_page':'contact','form': form,})

I viewed this page on google, but I don't know how to do it :

https://docs.python.org/2.3/lib/node304.html

How about reading the docs on it? docs.djangoproject.com/en/1.11/topics/logging — Klaus D.
– Klaus D., Commented Aug 16, 2017 at 7:50

Dan Swain · Accepted Answer · 2022-04-06 00:58:48Z

19

Add logging configurations in settings.py:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'file': {
            'level': 'DEBUG',
            'class': 'logging.FileHandler',
            'filename': '/path/to/django/debug.log',
        },
    },
    'loggers': {
        'django': {
            'handlers': ['file'],
            'level': 'DEBUG',
            'propagate': True,
        },
    },
}

In views.py add the following code:

import logging
logger = logging.getLogger(__name__)
def contact(request):
    ...
    logger.debug('Log whatever you want')
    # It will be logged in '/path/to/django/debug.log' the path you have specified in settings.py logging conf

edited Apr 6, 2022 at 0:58

Dan Swain

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answered Aug 16, 2017 at 7:57

Himanshu dua

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6 Comments

user8427236 Over a year ago

LOGGING = { 'version': 1, 'disable_existing_loggers': False, 'handlers': { 'file': { 'level': 'DEBUG', 'class': 'logging.FileHandler', 'filename': 'farah.log', }, }, 'loggers': { 'django': { 'handlers': ['file'], 'level': 'DEBUG', 'propagate': True, }, }, }

user8427236 Over a year ago

else: #form = FeedbackForm() logger.debug('Log whatever you want')

user8427236 Over a year ago

The file farah.log dont show the message for logger.debug

Himanshu dua Over a year ago

@user8427236 please provide full path of log file

gregory Over a year ago

If you leave the type of loggers blank, every module will propagate. In other words, in this example change 'django': to ' ': (yes, blank).

|

dario · Accepted Answer · 2020-12-04 11:00:38Z

3

What is relevant is to insert in the Loggers, the name of your Django App that you want to log. For instance: if your app, inside your django project, is called "mouse" and you want to log to the "file" handler what is going on in the app, the logger should be like this:

'loggers': {
    'mouse': {
        'handlers': ['file'], 
        'level': 'DEBUG',
        'propagate': True,
    },

answered Dec 4, 2020 at 11:00

dario

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Comments

Matheus Schreiber · Accepted Answer · 2024-09-18 22:05:10Z

I separated different types of logs into different files

LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'handlers': {
    # Handler for all log messages
    'file_all': {
        'level': 'DEBUG',
        'class': 'logging.FileHandler',
        'filename': 'debug/all.log',
    },
    # Handler for warnings and errors
    'file_warnings_errors': {
        'level': 'WARNING',
        'class': 'logging.FileHandler',
        'filename': 'debug/warnings_errors.log',
    },
},
'loggers': {
    'django': {
        # Both handlers: one for all messages and another for warnings/errors
        'handlers': ['file_all', 'file_warnings_errors'],
        'level': 'DEBUG',
        'propagate': True,
    },
},

}

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