Django Caching

Configuring cache backends:

Django is able to take use of several backends for caching, for instance, in-memory caching, database caching, file cache, and distributed cache through external services such as Memcached and Redis.

You can customize cache backends for your Django project settings file (settings.py) itself.

                                
# settings.py

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

In this example, we're using Memcached as the default cache backend. You can adjust the configuration based on your requirements and available cache backends.

Using cache decorators:

Django provides cache decorators to easily add caching to views and functions.

You can specify the cache key, timeout, and other options when using cache decorators.

                                
# views.py

from django.views.decorators.cache import cache_page
from django.http import HttpResponse

@cache_page(60 * 15)  # Cache for 15 minutes
def my_view(request):
    # View logic here
    return HttpResponse("This is a cached response.")

In this example, we're caching the my_view function for 15 minutes using the cache_page decorator.

Manual caching:

You can also manually cache data using Django's cache API.

This allows you to cache specific data or parts of your application logic.

                                
# views.py

from django.core.cache import cache
from django.http import HttpResponse

def my_view(request):
    cached_data = cache.get('my_cached_data')
    if cached_data is None:
        # Calculate data if not cached
        data = "This is expensive data to calculate"
        cache.set('my_cached_data', data, timeout=60 * 15)  # Cache for 15 minutes
        return HttpResponse(data)
    else:
        return HttpResponse(cached_data)

In this example, we manually cache data using cache.get() to retrieve cached data and cache.set() to store data in the cache if it's not already cached.