How to check if ID in the URI is null and throw an error? - anypoint-studio

Question

I tried to check if a specific URL doesn't specified an ID
This are what I've got so far:
http://localhost:8082/orders/1234 ---- Success!
http://localhost:8082/orders/ ---- URL not found!
I want to throw and error something like "Id not specified!" not a URL not found.

Answer 1

Look at Validation Module
Look at the "Matches Regex" section down.
I have not tried it
Hope it may help

Answer 2

the believe the best approach for you is to start using RAML. you can design the endpoint in RAML and specify what error to be thrown if the request is not a match.
/{order_id}:
get:
description: Get a Order by id
responses:
200:
body:
application/json:
type: Foo
example: !include examples/Order.json
400:
body:
application/json:
type: Error
example: !include examples/Error.json
in the above RAML definition if there is no orders/{order_id} you will get a http 400 returned.

Answer 3

Define a custom error handling and that will return error description alongside other required data
set status code 400 in a variable, map fields as per below example.
ex:
{
"error": {
"errorCode": "NOT_FOUND",
"errorDateTime": "2019-10-10T14:00:46",
"errorMessage": "The requested API cannot be found, ID is not specified",
"errorDescription": "Description: /orders"
}
}