[Solved] What is wrong with this cache invalidation approach?cache.set('user_42', user_data, timeout=300) # Later in code cache.clear() | Django

Django - Caching

What is wrong with this cache invalidation approach?

cache.set('user_42', user_data, timeout=300)
# Later in code
cache.clear()

Acache.clear() removes all cache keys, not just 'user_42'

Bcache.set timeout is too short

Ccache.clear() does not remove any keys

Dcache.set key name is invalid

Step-by-Step Solution

Solution:

Step 1: Understand cache.clear() effect
cache.clear() removes all keys from the cache, not just one.
Step 2: Identify problem with approach
Using cache.clear() to invalidate one key is too broad and removes unrelated cached data.
Final Answer:
cache.clear() removes all cache keys, not just 'user_42' -> Option A
Quick Check:
cache.clear() clears entire cache [OK]

Quick Trick: Use cache.delete() to remove one key, not cache.clear() [OK]

Common Mistakes:

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What is wrong with this cache invalidation approach?