Mapper: map to target path only if input path is not null

aakumar - for simplicity I would solve this with 2 Mapper snaps.  The first, configure as follows:

Note the use of Passthrough and the Mapping Root so we can work within the products array.  Then we're using the Object.merge() method to pull the elements from the "bsn" array into the "products" array objects.

The second Mapper configured as below simply drops the "bsn" array from the products array.

Hope this helps!

aakumar You can also use use the AutoPrep Snap to flatten the incoming data hierarchy.. https://docs-snaplogic.atlassian.net/wiki/spaces/SD/pages/2568781882/AutoPrep?src=search