Payload field validation in WSO2 API Manager - wso2

Question

I've written a swagger and imported the same which will be validating the length of mobile number which should take 10 digits and also an input type which should accept only 1 Character as input or else it should throw an Error. But the message was going from APIM to ESB fairly. Should I've to make any more changes in API Manager or Code. Please suggest,
swagger: "2.0"
info:
version: v1.0.0
title: TestValidation
description: "This API to Test length Validation\n\n\nSupported operations :\n\n1. validation"
schemes:
- https
- http
consumes:
- application/json
produces:
- application/json
paths:
/validation:
post:
summary: dfgdf
description: fghfg
parameters:
- in: body
name: Payload
description: Request Body
required: false
schema:
$ref: "#/definitions/validation-request"
responses:
"200":
description: OK
schema:
$ref: "#/definitions/validation-response"
"400":
schema:
$ref: "#/definitions/TestValidation-api-error"
description: Bad Request. Invalid request or validation error.
"415":
schema:
$ref: "#/definitions/TestValidation-api-error"
description: Unsupported Media Type. The entity of the request was in a not supported format.
"500":
schema:
$ref: "#/definitions/TestValidation-api-error"
description: Internal Server Error
produces:
- application/json
consumes:
- application/json
x-auth-type: "Application & Application User"
x-throttling-tier: Unlimited
definitions:
validation-request:
type: object
properties:
MobileNum:
format: int64
type: number
minLength: 10
maxLength: 10
inputType:
type: string
minLength: 1
maxLength: 1
validation-response:
type: object
properties:
response:
type: object
TestValidation-api-error:
title: Error object returned with HTTP status
type: object
properties:
fault:
type: object
properties:
code:
format: int64
type: integer
type:
type: string
message:
description: Error message.
type: string
description:
description: A detail description about the error message.
type: string
required:
- code
- message

Answer 1

This feature is available in APIM 3.0.0. You have to enable it for each API you want it.
Here is the doc.
https://apim.docs.wso2.com/en/3.0.0/Learn/APISecurity/APIRequestResponseSchemaValidation/json-schema-validator/