[Solved] Given this request mapping template:{ "userId": "$input.path('$.user.id')", "action": "$input.path('$.action')" }And the incoming JSON request:{"user": {"id": "123"}, "action":... | AWS

AWS - API Gateway

Given this request mapping template:

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

And the incoming JSON request:

{"user": {"id": "123"}, "action": "login"}

What will be the transformed request sent to the backend?

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

B{"userId": null, "action": "login"}

C{"userId": "123", "action": "login"}

D{"userId": "user.id", "action": "login"}

Step-by-Step Solution

Solution:

Step 1: Extract values using JSONPath
$input.path('$.user.id') extracts "123" and $input.path('$.action') extracts "login" from the request JSON.
Step 2: Substitute extracted values into template
The template replaces placeholders with extracted values, producing {"userId": "123", "action": "login"}.
Final Answer:
{"userId": "123", "action": "login"} -> Option C
Quick Check:
Mapping extracts and replaces JSON fields correctly [OK]

Quick Trick: JSONPath extracts values for mapping templates [OK]

Common Mistakes:

MISTAKES

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