UnManaged RAP CDS Odata V4 - JSON array POST method

[enry79]

Hi,

  I have an Unmanaged RAP "Behavior Definition" public on Odatav4 Service Binding:

unmanaged implementation in class <my_class> unique;
strict ( 2 );
define behavior for <my_cds>
lock master
authorization master ( instance )
{
create;
}

In Create Method:

LOOP AT entities ASSIGNING FIELD-SYMBOL(<fs>).
* my checks
ENDLOOP.

In this example My_Cds have only 2 fields: test (key), description.

POSTMAN test:

When I try to send POST method with JSON Body with single entity work good:

 {

    "test": "001",

     "description": "Hello"

 }

When I try to send array entities like this:

[

   {

     "test": "001",

     "description": "Hello"

   },

   {

      "test": "002",

      "description": "Hello hello"

    }

]

The service response with 400 BadRequest:

 "message": {

            "lang": "en",

            "value": "Error while parsing an XML stream"

        }

I don't understand... Is JSON array correct?

On RAP Model, with unmanaged "Behavior Definition", can I send array records in Insert methods or there's a limitation of number of records?

Thanks

[MioYasutake · Accepted solution]

@enry79 

The create endpoint of an OData service is intended for posting a single entity, not an array.

If you want to post multiple records in one request, use a batch request. 

An alternative is to create an action that accepts a deep parameter.

https://help.sap.com/docs/abap-cloud/abap-rap/modeling-parameters-for-non-standard-operations

[enry79 · Accepted solution]

Thank you for answer.