SAP RAP Web API - Modify response body

[saurabh__khare]

Hi,

We've exposed a RAP service as an OData V4 Web API. It works as expected. Just that the default response of the POST call contains all the fields of the entity and the child entity when the request is successful. Is there a way to control/modify the response body(delete certain fields/send a generic response) before sending it to the consumer? Note that is a managed RAP BO with unmanaged save. The consumer triggers a create request, data is persisted in a custom DB table in the unmanaged save sequence and the control returns to the RAP framework for response generation.

Current default sample response:

Expected Response:
{ "Success" } or no response at all with HTTP status 200 would also work.

Any suggestions?

@JessieCheah @Andre_Fischer 

[vhardzeyenka]

Hi saurkhare.

It seems that you cannot modify response body in RAP Web API (unlike we could do such stuff in oData Gateway, for example), fields get returned by default. 

Instead of than you can try to use ?$select=FieldName in the request URL. It returns you the only field you selected + standard system fields. 

Please compare without ?$select parameter. 

And with ?$select parameter. 

Regards

Vitali

[saurabh__khare]

 Hi Vitali,

Thank you for your response. I think that would work for us.

Regards,

Saurabh

[Jay_Prakash_Singh]

May i know how you did this , I also have same requirement with unmanaged scenario but when i am trying to add ?$select=FieldName in my post query it is giving me problem that The Data Services Request contains SystemQueryOptions that are not allowed for this Request Type

[saurabh__khare]

Hi,

This did not work for us as well using RAP Web API. Not sure if this works in public cloud systems or BTP ABAP env. On on-premise/private cloud it does not.

.../sap/opu/odata4/sap/zfi_api_invoiceapi_o4/srvd_a2x/sap/zfi_api_invoiceapi_o4/0001/InvoiceAPI?sap-client=200&$select=InvUUID

"message": "The requested URI allows the system query options: '$expand,$format'"

So $select does not work. @vhardzeyenka: How did you create your service? Is it a RAP-based service or SEGW?

[Jay_Prakash_Singh]

It’s a RAP based API