Now with ASGI support!

Django GUID attaches a unique correlation ID/request ID to all your log outputs for every request. In other words, all logs connected to a request now has a unique ID attached to it, making debugging simple.

Resources:

• Free software: MIT License
• Documentation: https://django-guid.readthedocs.io
• Homepage: https://github.com/snok/django-guid

Examples

Log output with a GUID:

INFO ... [773fa6885e03493498077a273d1b7f2d] project.views This is a DRF view log, and should have a GUID. WARNING ... [773fa6885e03493498077a273d1b7f2d] project.services.file Some warning in a function INFO ... [0d1c3919e46e4cd2b2f4ac9a187a8ea1] project.views This is a DRF view log, and should have a GUID. INFO ... [99d44111e9174c5a9494275aa7f28858] project.views This is a DRF view log, and should have a GUID. WARNING ... [0d1c3919e46e4cd2b2f4ac9a187a8ea1] project.services.file Some warning in a function WARNING ... [99d44111e9174c5a9494275aa7f28858] project.services.file Some warning in a function

Log output without a GUID:

INFO ... project.views This is a DRF view log, and should have a GUID. WARNING ... project.services.file Some warning in a function INFO ... project.views This is a DRF view log, and should have a GUID. INFO ... project.views This is a DRF view log, and should have a GUID. WARNING ... project.services.file Some warning in a function WARNING ... project.services.file Some warning in a function

See the documentation for more examples.

Install using pip:

pip install django-guid

Package settings are added in your settings.py:

DJANGO_GUID = { 'GUID_HEADER_NAME': 'Correlation-ID', 'VALIDATE_GUID': True, 'RETURN_HEADER': True, 'EXPOSE_HEADER': True, 'INTEGRATIONS': [], 'IGNORE_URLS': [], 'UUID_LENGTH': 32, }

Optional Parameters

• GUID_HEADER_NAME

  The name of the GUID to look for in a header in an incoming request. Remember that it's case insensitive.

  Default: Correlation-ID

• VALIDATE_GUID

  Whether the GUID_HEADER_NAME should be validated or not. If the GUID sent to through the header is not a valid GUID (uuid.uuid4).

  Default: True

• RETURN_HEADER

  Whether to return the GUID (Correlation-ID) as a header in the response or not. It will have the same name as the GUID_HEADER_NAME setting.

  Default: True

• EXPOSE_HEADER

  Whether to return Access-Control-Expose-Headers for the GUID header if RETURN_HEADER is True, has no effect if RETURN_HEADER is False. This is allows the JavaScript Fetch API to access the header when CORS is enabled.

  Default: True

• INTEGRATIONS

  Whether to enable any custom or available integrations with django_guid. As an example, using SentryIntegration() as an integration would set Sentry's transaction_id to match the GUID used by the middleware.

  Default: []

• IGNORE_URLS

  URL endpoints where the middleware will be disabled. You can put your health check endpoints here.

  Default: []

• UUID_LENGTH

  Lets you optionally trim the length of the package generated UUIDs.

  Default: 32

Once settings have set up, add the following to your projects' settings.py:

Add django_guid to your INSTALLED_APPS:

INSTALLED_APPS = [ ... 'django_guid', ]

Add the django_guid.middleware.guid_middleware to your MIDDLEWARE:

MIDDLEWARE = [ 'django_guid.middleware.guid_middleware', ... ]

It is recommended that you add the middleware at the top, so that the remaining middleware loggers include the requests GUID.

Add django_guid.log_filters.CorrelationId as a filter in your LOGGING configuration:

LOGGING = { ... 'filters': { 'correlation_id': { '()': 'django_guid.log_filters.CorrelationId' } } }

Put that filter in your handler:

LOGGING = { ... 'handlers': { 'console': { 'class': 'logging.StreamHandler', 'formatter': 'medium', 'filters': ['correlation_id'], } } }

And make sure to add the new correlation_id filter to one or all of your formatters:

LOGGING = { ... 'formatters': { 'medium': { 'format': '%(levelname)s %(asctime)s [%(correlation_id)s] %(name)s %(message)s' } } }

If these settings were confusing, please have a look in the demo projects' settings.py file for a complete example.

If you wish to see the Django GUID middleware outputs, you may configure a logger for the module. Simply add django_guid to your loggers in the project, like in the example below:

LOGGING = { ... 'loggers': { 'django_guid': { 'handlers': ['console', 'logstash'], 'level': 'WARNING', 'propagate': False, } } }

This is especially useful when implementing the package, if you plan to pass existing GUIDs to the middleware, as misconfigured GUIDs will not raise exceptions, but will generate warning logs.