[Solved] You want to optimize a REST API call to fetch only the id, name, and email fields of users, but your API client library... Which query parameter should you use to correctly request sparse fieldsets? | Rest API

Rest API - Advanced Patterns

You want to optimize a REST API call to fetch only the id, name, and email fields of users, but your API client library automatically encodes square brackets. Which query parameter should you use to correctly request sparse fieldsets?

Afields(users)=id,name,email

Bfields[users]=id,name,email

Cfields%5Busers%5D=id,name,email

Dfields-users=id,name,email

Step-by-Step Solution

Solution:

Step 1: Understand URL encoding for brackets
When the API client library automatically encodes square brackets in URLs, provide the raw form with literal square brackets. The client will properly encode them to %5B and %5D.
Step 2: Match syntax with options
fields[users]=id,name,email is the raw syntax to use, which the client encodes correctly to fields%5Busers%5D=id,name,email.
Final Answer:
fields%5Busers%5D=id,name,email -> Option C
Quick Check:
Raw brackets; client encodes to %5B%5D [OK]

Quick Trick: Use raw fields[resource]=...; client auto-encodes brackets [OK]

Common Mistakes:

MISTAKES

Pre-encoding brackets as %5B%5D (risks double-encoding)
Using parentheses instead of brackets
Replacing brackets with dashes

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Which query parameter should you use to correctly request sparse fieldsets?

Step 1: Understand URL encoding for brackets

Step 2: Match syntax with options

Final Answer:

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