SAP UI5 how to pass data to header and line item entity set using CREATE method

Hi,

We have two different entity sets for header and line item data in SAP. We defined the association to link header and line item details. We are able to post the document in SAP using XML template.

We designed the frontend using UI5 elements and need to post the document. Need the solution for the below issues.

1) How do we map the data of a view to ODATA model?

2) How do push the header and line item data of ODATA model to SAP using CREATE method?

As far as I know, we can specify one Entity Set in CREATE method. Our requirement is to push data to two different Entity Set using CREATE method.

Regards

Nidhi