Filemaker Problem - How do you search a portal in a script? ANSWER NOT SHOWN

Описание: I'm trying to figure out how to add a supplier's product info to a product card, but limit the user from adding new supplier product info to a product that already has info from that supplier. IOW, we don't want two different costs or codes for a product from the same supplier.

This video is just to demonstrate the problem. Once I figure out the solution, I'll post it in another video and link in the description or comments.