How to set an inverse relationship in XCode

Question

This is a silly question, but I seriously didn't find an answer...

I have a one-to-many relationship from the Entity Events to Discounts and I set a relationship like this in Xcode:

I need that relationship to be inverse, so I can check which Event a Discount is from, but in XCode I can only choose "No Inverse." How can I set that relationship to be inverse?!

If you have to do it programatically, first, seriously? It can't be done from XCode? Secondly, how can I do it? And where should this be done?

Thanks

Answer 1

To be able to set inverse relationship you need to create it first in destination entity.

So in Discounts entity create relationship to Event that you want to use as reverse (e.g. event), then you will be able to choose it as reverse for your toDiscounts relationship