Which of the following is the correct syntax to access a JSON field named userId in a request mapping template?

easy📝 Configuration Q12 of 15

AWS - API Gateway

Which of the following is the correct syntax to access a JSON field named userId in a request mapping template?

A$input.path('$.userId')

B$input.json('userId')

C$input.get('userId')

D$input.body('userId')

Step-by-Step Solution

Solution:

Step 1: Recall JSON path syntax in mapping templates
The correct way to access a JSON field is using $input.path('$.fieldName').
Step 2: Match the syntax to the field userId
Using $input.path('$.userId') correctly accesses the userId field.
Final Answer:
$input.path('$.userId') -> Option A
Quick Check:
JSON field access = $input.path('$.field') [OK]

Quick Trick: Use $input.path('$.fieldName') to access JSON fields [OK]

Common Mistakes:

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