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Prevent duplicate records on join-table per parent Record

Question asked by mknightnps on Oct 31, 2014
Latest reply on Oct 31, 2014 by philmodjunk

Title

Prevent duplicate records on join-table per parent Record

Post

I have a products layout with a portal to a join table where a user can assign inks to the product. I want to prevent a user from assigning the same ink to a product multiple times. The inks can be used with many products.

Products Table > Inks Selected Table < Inks Table

How do you resolve this? I searched around and perhaps I'm phrasing it wrong but I could not find an answer.

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