django-groups-cache 1.0.2

Caches the groups a user is in so requests don't have to make calls to the database to check group status.

Caches the groups a user is in so requests don’t have to make calls to the database to check group status.

Support

Currently supporting Django 1.8, 1.11, and 2.0 with Python 2.7/Python 3 where support for versions aligns with Django’s support. See the tox.ini file for specific Python and Django version pairings.

Documentation

The full documentation is at https://django-groups-cache.readthedocs.io.

Quickstart

Install django-groups-cache:

pip install django-groups-cache

Add it to your INSTALLED_APPS:

INSTALLED_APPS = (
    ...
    'groups_cache.apps.GroupsCacheConfig',
    ...
)

Add the middleware to your MIDDLEWARE_CLASSES:

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    ...
    'groups_cache.middleware.GroupsCacheMiddleware',
)

Checking in a Django Template if the user is in a group name:

{% if "admins" in request.groups_cache %}
  <a href="/admin">Admin Panel</a>
{% endif %}

# or use templatetag, note that templatetag is slower

{% load has_group %}

{% if request.user|has_group:"admins" %}
  <a href="/admin">Admin Panel</a>
{% endif %}

Turn on caching:

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '127.0.0.1:11211',
    }
}

See https://docs.djangoproject.com/en/1.10/topics/cache/#memcached for more details on setting up memcached.

Note**

Using django.core.cache.backends.locmem.LocMemCache is not safe for production unless you are only running a single process (and odds are you aren’t).

See https://docs.djangoproject.com/en/1.10/topics/cache/#local-memory-caching for more details.

Features

• Adds groups_cache property to request object
• Provides templatetag has_group
• Invalidates cache on User or Group model changes and on m2m groups ManyToManyField changes
• Fully tested with high coverage

Running Tests

source <YOURVIRTUALENV>/bin/activate
(myenv) $ pip install tox
(myenv) $ tox

Credits

Tools used in rendering this package:

• Cookiecutter
• cookiecutter-djangopackage

History

0.5.5 (2017-01-13)

• Bug fix for templatetag has_group
• Tests added for 100% coverage of templatetag folder

0.5.5 (2017-01-12)

• Omit urls.py from coverage report (not used but needed for django package)
• Omit apps.py from coverage report (default apps file)

0.5.4 (2017-01-12)

• Removal of py32/django1.8 support from Travis CI build

0.5.3 (2017-01-12)

• Fixing .travis.yml file and CI builds

0.5.2 (2017-01-12)

• Typo in README.rst

0.5.1 (2017-01-12)

• Add codecov.io support
• Documentation updates

0.5.0 (2017-01-12)

• Add requirements.txt to tox.ini so tests can run
• Fix broken compatibility with Django 1.8/1.9 due to backwards incompatible changes in 1.9/1.10 code

0.4.0 (2017-01-12)

• Add test suite that generates 100% coverage
• Fixed a bug found by test suite with cache not invalidating on the groups ManyToManyField changing

0.3.1 (2017-01-11)

• Documentation updates

0.3.0 (2017-01-11)

• First stable and working release on PyPI.

0.1.0 (2017-01-11)

• First release on PyPI.