You want to cache a Flask route but have separate cache entries based on the query parameter ?category=. Which decorator usage correctly achieves this?

hard📝 Application Q8 of 15

Flask - Middleware and Extensions

You want to cache a Flask route but have separate cache entries based on the query parameter ?category=. Which decorator usage correctly achieves this?

A@cache.cached(timeout=30, unless=lambda: 'category' not in request.args)

B@cache.cached(timeout=30, key_prefix='category')

C@cache.cached(timeout=30, query_string=True)

D@cache.cached(timeout=30, make_cache_key=lambda: 'category')

Step-by-Step Solution

Solution:

Step 1: Understand query_string parameter
Setting query_string=True makes the cache key vary by the full query string.
Step 2: Effect on caching
This causes different cache entries for different query parameters like ?category=books vs ?category=movies.
Final Answer:
@cache.cached(timeout=30, query_string=True) -> Option C
Quick Check:
Use query_string=True to vary cache by URL params [OK]

Quick Trick: Use query_string=True to cache by query params [OK]

Common Mistakes:

MISTAKES

Using key_prefix incorrectly for query params
Misusing unless or make_cache_key for this purpose

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You want to cache a Flask route but have separate cache entries based on the query parameter ?category=. Which decorator usage correctly achieves this?

Step 1: Understand query_string parameter

Step 2: Effect on caching

Final Answer:

Quick Check:

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