[Solved] Given this request mapping template:{ "user": "$input.path('$.username')", "id": "$input.path('$.userId')" }What will be the transformed request if the client sends:{"username": "alice", "userId":... | AWS

AWS - API Gateway

Given this request mapping template:

{
  "user": "$input.path('$.username')",
  "id": "$input.path('$.userId')"
}

What will be the transformed request if the client sends:

{"username": "alice", "userId": "123"}

A{"user": "$.username", "id": "$.userId"}

B{"username": "alice", "userId": "123"}

C{"user": "alice", "id": "123"}

D{"user": null, "id": null}

Step-by-Step Solution

Solution:

Step 1: Understand the mapping template fields
The template maps user to $.username and id to $.userId.
Step 2: Apply the client JSON values
Client sends username as "alice" and userId as "123", so these replace the template placeholders.
Final Answer:
{"user": "alice", "id": "123"} -> Option C
Quick Check:
Template fields replaced by client values [OK]

Quick Trick: Mapping replaces template fields with client JSON values [OK]

Common Mistakes:

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