Action Payload Transformation with an empty JSON body

[Panickev]

I'm implementing some REST APIs through Hasura Actions with Request Options Transformation and Payload Transformation. I've implemented a PostalCode API with a Get request which uses a body. After that I started to implement Mollie. The Create Payment request works which is a Post with a body.

Now I'm trying to implement the Get Payment request which is a Get without a body. This is were I get stuck.

I tried calling the endpoint in Postman. If I use a get without a body, it succeeds. If I call the endpoint with an empty JSON object in the body, the call succeeds. If I put anything in the JSON object, e.g, { "foo": "bar" } the request fails with message Non-existent body parameter \"foo\" for this API call.

I added a Action named getPayment.

Action definition
type Query { """ getPayment """ getPayment( id: String! ): getPaymentOutput }

Type configuration
type getPaymentOutput { status: String! }

Webhook (HTTP /S) Handler
https://api.mollie.com/v2/payments/

Headers
Authorization: Bearer test_xxxxxxxxxxxxxx

Request Method
GET

Request URL Template
{{$base_url}}{{$body.input.id}} which results in https://api.mollie.com/v2/payments/tr_beyf7df when the value of id is set to tr_beyf7df

With the Request body I have tried different things which results in different output.

• Removing the Payload Transformation
• • Results in an error with message Non-existent body parameter \"request_query\" for this API call. So instead of transforming the request it just puts the GraphQl query as the body. Which makes sense.
• Setting the Request Body to {}
• • Results in an error with message The JSON request body does not represent an object. What happens is that instead of putting {} as the body, it sets it as "null"
• Setting the Request Body to { "id": {{$body.input.id}} }
• • Results in an error with message Non-existent body parameter \"id\" for this API call. Which also makes sense because this is the same error when I try this in Postman. I tried this just to check if I would get the same error.

I've tried some other things with the Request Body like setting it to null or try to escape the {} or using multiple brackets. But I can't seem to get Hasura to just send an empty object as the body, or no body at all.

I noticed that the action has the template engine Kriti which I looked in to but also can't find how to make it return an empty JSON object.

Can anybody help met with this?

Thanks in advance!

[knenkne]

There was a bug, they fixed it at 2.4