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You want to design a REST API error response that clearly tells the user their input is missing a required field called "email". Which JSON response is best?

hard🚀 Application Q8 of Q15

Rest API - Error Handling

You want to design a REST API error response that clearly tells the user their input is missing a required field called "email". Which JSON response is best?

A{"error": 400, "message": "email"}

B{"error": "Missing required field", "field": "email", "code": 400}

C{"message": "Error", "code": "email missing"}

D{"status": "error", "details": 400}

Step-by-Step Solution

Solution:

Step 1: Identify clear error description and field name
{"error": "Missing required field", "field": "email", "code": 400} clearly states the error and specifies which field is missing.
Step 2: Check for proper data types and keys
{"error": "Missing required field", "field": "email", "code": 400} uses strings for error and field, and numeric code for status.
Final Answer:
{"error": "Missing required field", "field": "email", "code": 400} -> Option B
Quick Check:
Clear error + field name + code = Best response [OK]

Quick Trick: Specify missing field in error message [OK]

Common Mistakes:

MISTAKES

Using numbers instead of strings for messages
Not specifying which field is missing
Mixing up keys and values

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