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Made logging config examples more accessible.
- Show an initial example configuring the root logger to output to the console. - Then add more logging from the `django` named logger. - Then show the file and more complex examples. Adjusted surrounding text for reading flow. Co-authored-by: Carlton Gibson <carlton.gibson@noumenal.es>
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@ -238,8 +238,73 @@ The full documentation for :ref:`dictConfig format <logging-config-dictschema>`
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is the best source of information about logging configuration dictionaries.
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However, to give you a taste of what is possible, here are several examples.
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First, here's a configuration which writes all logging from the
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:ref:`django-logger` logger to a local file:
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To begin, here's a small configuration that will allow you to output all log
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messages to the console:
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.. code-block:: python
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:caption: settings.py
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import os
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LOGGING = {
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'version': 1,
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'disable_existing_loggers': False,
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'handlers': {
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'console': {
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'class': 'logging.StreamHandler',
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},
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},
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'root': {
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'handlers': ['console'],
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'level': 'WARNING',
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},
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}
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This configures the parent ``root`` logger to send messages with the
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``WARNING`` level and higher to the console handler. By adjusting the level to
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``INFO`` or ``DEBUG`` you can display more messages. This may be useful during
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development.
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Next we can add more fine-grained logging. Here's an example of how to make the
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logging system print more messages from just the :ref:`django-logger` named
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logger:
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.. code-block:: python
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:caption: settings.py
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import os
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LOGGING = {
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'version': 1,
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'disable_existing_loggers': False,
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'handlers': {
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'console': {
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'class': 'logging.StreamHandler',
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},
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},
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'root': {
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'handlers': ['console'],
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'level': 'WARNING',
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},
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'loggers': {
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'django': {
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'handlers': ['console'],
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'level': os.getenv('DJANGO_LOG_LEVEL', 'INFO'),
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'propagate': False,
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},
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},
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}
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By default, this config sends messages from the ``django`` logger of level
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``INFO`` or higher to the console. This is the same level as Django's default
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logging config, except that the default config only displays log records when
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``DEBUG=True``. Django does not log many such ``INFO`` level messages. With
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this config, however, you can also set the environment variable
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``DJANGO_LOG_LEVEL=DEBUG`` to see all of Django's debug logging which is very
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verbose as it includes all database queries.
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You don't have to log to the console. Here's a configuration which writes all
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logging from the :ref:`django-logger` named logger to a local file:
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.. code-block:: python
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:caption: settings.py
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@ -266,37 +331,6 @@ First, here's a configuration which writes all logging from the
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If you use this example, be sure to change the ``'filename'`` path to a
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location that's writable by the user that's running the Django application.
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Second, here's an example of how to make the logging system print Django's
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logging to the console. It may be useful during local development.
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By default, this config only sends messages of level ``INFO`` or higher to the
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console (same as Django's default logging config, except that the default only
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displays log records when ``DEBUG=True``). Django does not log many such
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messages. With this config, however, you can also set the environment variable
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``DJANGO_LOG_LEVEL=DEBUG`` to see all of Django's debug logging which is very
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verbose as it includes all database queries:
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.. code-block:: python
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:caption: settings.py
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import os
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LOGGING = {
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'version': 1,
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'disable_existing_loggers': False,
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'handlers': {
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'console': {
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'class': 'logging.StreamHandler',
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},
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},
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'loggers': {
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'django': {
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'handlers': ['console'],
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'level': os.getenv('DJANGO_LOG_LEVEL', 'INFO'),
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},
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},
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}
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Finally, here's an example of a fairly complex logging setup:
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.. code-block:: python
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