I have a scenario to create vendor disbursement data using UI5 app in ECC. I am taking care of the ODATA service. I have created the CRUD service for this, however data validation and pre-populated data has to be shown. User enters PO number through the APP.How do I validate this po number in ECC and send back required information like vendor details back to the APP. In case PO is not found in the backend error handling needs to be done.Message has to be passed back to the APP.
Experts,please help.