[Solved] This Django code tries to cache a complex object but causes an error:from django.core.cache import cache class MyObject: def __init__(self, value): self.value = value obj = MyObject(10) cache.... | Django

Django - Caching

This Django code tries to cache a complex object but causes an error:

from django.core.cache import cache

class MyObject:
    def __init__(self, value):
        self.value = value

obj = MyObject(10)
cache.set('obj', obj, timeout=300)

What is the likely cause of the error?

ATimeout value must be a string, not integer

Bcache.set requires a string value only

CThe object is not serializable for caching

DMyObject class must inherit from Django model

Step-by-Step Solution

Solution:

Step 1: Understand cache storage requirements
Django cache backends usually require cached data to be serializable (e.g., picklable).
Step 2: Check object serializability
Custom class instances like MyObject may not be serializable by default, causing errors.
Final Answer:
The object is not serializable for caching -> Option C
Quick Check:
Non-serializable objects cause cache errors [OK]

Quick Trick: Cache only serializable data like strings or dicts [OK]

Common Mistakes:

MISTAKES

Thinking cache only accepts strings
Believing timeout must be string
Assuming class must be Django model to cache

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This Django code tries to cache a complex object but causes an error:

Step 1: Understand cache storage requirements

Step 2: Check object serializability

Final Answer:

Quick Check:

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