Low-level cache API in Django - Mini Project: Build & Apply

Using Django Low-level Cache API

📖 Scenario: You are building a simple Django view that caches the result of a slow calculation to improve performance.

🎯 Goal: Learn how to use Django's low-level cache API to store, retrieve, and delete cached data.

📋 What You'll Learn

Create a cache key and store a value in the cache

Set a timeout for the cached value

Retrieve the cached value using the cache key

Delete the cached value from the cache

💡 Why This Matters

🌍 Real World

Caching is used to speed up web applications by storing expensive results temporarily.

💼 Career

Understanding Django's cache API is important for backend developers to optimize performance.

1

Set up cache key and value

Create a variable called cache_key with the value 'slow_calculation_result' and a variable called result with the value 42.

Django

# Your code here

Need a hint?

Use simple assignment to create cache_key and result.

2

Set cache timeout

Create a variable called timeout and set it to 300 seconds (5 minutes).

Django

cache_key = 'slow_calculation_result'
result = 42
# Your code here

Need a hint?

Timeout is the number of seconds the cache will keep the value.

3

Store value in cache

Import cache from django.core.cache and use cache.set() to store result with the key cache_key and timeout timeout.

Django

cache_key = 'slow_calculation_result'
result = 42
timeout = 300
# Your code here

Need a hint?

Use cache.set(key, value, timeout) to save data in the cache.

4

Retrieve and delete cached value

Use cache.get() with cache_key to retrieve the cached value into a variable called cached_result. Then use cache.delete() with cache_key to remove it from the cache.

Django

from django.core.cache import cache

cache_key = 'slow_calculation_result'
result = 42
timeout = 300

cache.set(cache_key, result, timeout)
# Your code here

Need a hint?

Use cache.get(key) to read and cache.delete(key) to remove cached data.