django2_manager_cache
- Simple cache manager for Django 2 models that caches querysets for a model.
- Cache manager will cache any query that has been seen for a model.
- Model cache is evicted for any updates/deletes to the model.
- This manager is useful for models that don't change often.
Installation
- pip install django2-manager-cache
Caching strategy
- Cache results for a model on load.
- Evict cache for model on update.
Usage
Add to installed apps:
INSTALLED_APPS = ( ... 'django2_manager_cache', ... )
Add the manager to a django model:
from django2_manager_cache import CacheManager class MyModel(models.Model): # set cache manager as default objects = CacheManager() # to use this manager with as related manager # https://docs.djangoproject.com/en/2.2/topics/db/managers/#base-managers # class Meta: # base_manager_name = 'objects'
Define cache backend for django2_manager_cache.cache_backend
in
settings.py
. The backend can be any cache backend that implements
django cache API.:
CACHES = { 'django2_manager_cache.cache_backend': { 'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache', 'LOCATION': '127.0.0.1:11211', } }
Django shell
To run django shell with sample models defined in tests.:
make shell
Sample models:
from tests.models import Manufacturer from tests.models import Car from tests.models import Driver m = Manufacturer(name='Tesla') m.save() c = Car(make=m, model='Model S', year=2015) c.save() d = Driver(first_name ='ABC', last_name='XYZ') d.save() d.cars.add(c) drivers = Driver.objects.select_related('car', 'manufacturer').all()
Testing
To run tests:
make test
Supported Django versions
Supported - 1.5, 1.6, 1.7, 1.8, 1.9, 1.11, 2.0, 2.1, 2.2