[Solved] Given this PATCH request body to update a product: {"price": 19.99} What will be the result if the original product data was {"name": "Book", "price": 25.00, "stock": 10}? | Rest API

Rest API - HTTP Methods

Given this PATCH request body to update a product:

{"price": 19.99}

What will be the result if the original product data was

{"name": "Book", "price": 25.00, "stock": 10}

?

A{"name": "Book", "price": 25.00, "stock": 10}

B{"price": 19.99}

C{"name": "Book", "price": 19.99, "stock": 10}

D{"name": "Book", "stock": 10}

Step-by-Step Solution

Solution:

Step 1: Understand PATCH partial update
PATCH updates only the fields sent, here "price" changes to 19.99.
Step 2: Combine unchanged fields with updated field
Fields not in PATCH body remain unchanged, so "name" and "stock" stay the same.
Final Answer:
{"name": "Book", "price": 19.99, "stock": 10} -> Option C
Quick Check:
PATCH updates price only, others unchanged [OK]

Quick Trick: PATCH changes only sent fields, keeps others [OK]

Common Mistakes:

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