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Gias Uddin
Gias Uddin

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All you need to about Django Caching-redis-cache

Application performance tuning and decrease the load time of a web application is very important for successful products. Redis, a versatile tool, is an open-source, in-memory data structure store, used as a database, cache, and message broker. In this blog, I will show you how to use Redis for Django caching.

Let’s assume you have already created a Django project in your pc.

Install redis and django-redis

sudo apt-get install redis-server
pip install django-redis
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check redis in shell

$ redis-cli ping
output: PONG
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Now add cache configuration in your Django application

        "default": {
            "BACKEND": "django_redis.cache.RedisCache",
            "LOCATION": "redis://",
            "OPTIONS": {
                "CLIENT_CLASS": "django_redis.client.DefaultClient"
            "KEY_PREFIX": "testApp"
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_We have enabled cache backend but none of the view is enable for cache.

Now we will enable cache for django per view

@cache_page( 60 * 15, "blog" );
def blog( request ):
    response = render(request, 'template')

    return response
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Also, you can apply this decorator in, that is convenient for Class-Based Views or function base view:

from django.views.decorators.cache import cache_page

urlpatterns = [
    url(r'^$', cache_page(600)(BlogListView.as_view()), name='articles_list'),
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Template fragment caching**

{% load cache %}

<h1>Articles list</h1>

<p>Authors count: {{ authors_count }}</p>

<h2>Top authors</h2>

{% cache 500 top_author %}
    {% for author in top_authors %}
    <li>{{ author.username }} ({{ author.articles_count }})</li>
    {% endfor %}
{% endcache %}

{% cache 500 articles_list %}
{% for article in articles %}
    <h2>{{ article.title }}</h2>
    <time>{{ article.created_at }}</time>
    <p>Author: <a href="{% url 'author_page' %}">{{ }}</a></p>
    {% for tag in article.tags.all %}
        {{ tag }}{% if not forloop.last %}, {% endif %}
    {% endfor %}
{% endfor %}
{% endcache %}

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If you need per user base separate caching then we can use this way

{% cache 500 personal_articles_list request.user.username %}
    <!-- ... -->
{% %}
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The low-level caching

from django.core.cache import cache

class AuthorListView(ListView):


    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        authors_count = cache.get('authors_count')
        if authors_count is None:
            authors_count = Author.objects.count()
            cache.set('authors_count', authors_count)
        context['authors_count'] = authors_count
        return context
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cached_property decorator

class UserBio(models.Model):

    username = models.CharField(max_length=64, db_index=True)
    email = models.EmailField()
    bio = models.TextField()

    def articles_count(self):
        return self.articles.count()
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Django cache clear

from django.core.cache import cache
# all cache delete
# specifiq cache delete by cache key
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Thank you for reading my article! If you enjoyed it and would like to support my work, please consider buying me a coffee at Buy Me a Coffee. You can also learn more about me and my work by visiting my Giasuddin Bio and following me on LinkedIn and Twitter. Thank you for your support!

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