[Solved] Consider this Django view code:from django.core.cache import cache def sample_view(request): message = cache.get('greeting') if message is None: message = 'Welcome!' cache.... | Django

Django - Caching

Consider this Django view code:

from django.core.cache import cache

def sample_view(request):
    message = cache.get('greeting')
    if message is None:
        message = 'Welcome!'
        cache.set('greeting', message, timeout=60)
    return message

What will this view return on the first request when the cache is empty?

ANone, because the cache key does not exist yet

B'Welcome!' and cache stores this value for 60 seconds

CAn error, since cache.get returns None and is not handled

D'greeting' string literal

Step-by-Step Solution

Solution:

Step 1: Check cache retrieval
cache.get('greeting') returns None if key missing.
Step 2: Handle missing cache
Since message is None, it is set to 'Welcome!' and cached for 60 seconds.
Final Answer:
'Welcome!' and cache stores this value for 60 seconds -> Option B
Quick Check:
Is the cache key missing initially? Yes, so default is set [OK]

Quick Trick: If cache miss, set and return default value [OK]

Common Mistakes:

MISTAKES

Assuming cache.get returns an error on missing key
Expecting None to be returned without fallback
Confusing the cache key with its value

Master "Caching" in Django

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More Django Quizzes

Consider this Django view code:

Step 1: Check cache retrieval

Step 2: Handle missing cache

Final Answer:

Quick Check:

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