I have two entities, a “seller” and “product”. A “seller” possesses a list of products, therefore every product has an associated “seller” (each product is unique to each seller).
When I manually upload a product (for development purposes), I have to input the “Seller” at the point of construction. What value do I supply in this field? Is it the Seller ID?
The seller is now an object (… a thing … a data-type) in your database. So in order to add one it needs to exist in the database. You pick it inside the dB editor new entry window by keying-in the unique id of each of he objects that you want to add.
Easiest way would be to build a form with inputs and a create button. And display the entries in a repeating group. The button once pressed should have a flow that creates the objects in the database with their necessary fields.
Unique ID is not shown by default on App Data. You can click “X additional fields” link on App Data tab, then there will be a pop up to manage which field that will be shown on App Data. You just need to check “Unique ID” on the pop up to show it.