Dynamics 365 API v2: Adding sales lines to an existing sales order - web-services

Question

I am trying to add sales lines to an existing sales order using the standard API included with dynamics 365 business central. However I cannot find the correct syntax on the api request to accomplish this.
I have tried posting to the companies({id})/salesOrderLines endpoint, and the companies({id})/salesOrder({id})/salesOrderLines endpoint but no matter how I try to work my request I always get the "Invalid Request Body" error.
Here is an example of the request I sent to the companies({id})/salesOrderLines endpoint:
Here is my request body:
[
{
"id": "e92c39cb-f552-4d4f-b680-ad7ded2949d0",
"documentId": "e80573b0-9c8b-ed11-bfba-001dd8b71ee3",
"lineType": "Item",
"lineObjectNumber": "H10-110013",
"quantity": 1
},
{
"id": "e92c39cb-f552-4d4f-b680-ad7ded2949d0",
"documentId": "e80573b0-9c8b-ed11-bfba-001dd8b71ee3",
"lineType": "Item",
"lineObjectNumber": "H10-112117",
"quantity": 1
}
]
Here is the response I get back:
"{"error":{"code":"BadRequest","message":"Invalid Request
Body CorrelationId: 241e540a-5af5-4516-83f2-fbc035f80389."}}"
I am able to post a sales order and its lines simultaneously using deep requests but with larger orders they hit the request limit and I need a way of splitting up the lines.

Answer 1

salesOrderLines endpoint expects an object and does not accept collections, so best you can do here is post each line in a separate request.
Request body would look like this:
{
"lineType": "Item",
"lineObjectNumber": "H10-110013",
"quantity": 1
}
id and documentId can be added to the request, but not really required.
Another option is to send the request on the $batch endpoint as described in the docs here: https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/webservices/use-odata-batch
POST http://bc21-dev:7048/bc/api/v2.0/$batch
{
"requests": [
{
"method": "POST",
"url": "http://bc21-dev:7048/bc/api/v2.0/salesOrders(dd3585b3-dd6c-ed11-81b4-6045bd8e5172)/salesOrderLines",
"headers": {
"Company": "CRONUS International Ltd.",
"Content-Type": "application/json"
},
"body": {
"lineType": "Item",
"lineObjectNumber": "1920-S",
"quantity": 2,
"unitPrice": 420.4
}
},
{
"method": "POST",
"url": "http://bc21-dev:7048/bc/api/v2.0/salesOrders(dd3585b3-dd6c-ed11-81b4-6045bd8e5172)/salesOrderLines",
"headers": {
"Company": "CRONUS International Ltd.",
"Content-Type": "application/json"
},
"body": {
"lineType": "Item",
"lineObjectNumber": "1952-W",
"quantity": 1,
"unitPrice": 183.12
}
}
]
}