CoreData - can't set empty string as default value for attribute

Question

I have an entity in my datamodel with a string attribute that is currently optional, and I\'d like to convert this to a required attribute with a default value of the empty stri

Answer 1

Whip out your favorite XML editor (I just used Emacs) and dive down to the contents file inside the .xcdatamodel bundle inside the .xcdatamodeld bundle. Then just add a defaultValueString="" XML attribute to the ... element inside the ... brackets. Here's an example:

I can't speak to whether this survives migration since I haven't had to do that yet.