Core data error: Unsupported expression type (11, SIZE)

Question

The error happens when I try to create following NSPredicate:

let predicate = NSPredicate(format: "size = nil")

The error is as follows:

Unsupported expression type (11, SIZE)

Answer 1

This is because size is reserved word in Core Data. This can be fixed like this:

let predicate = NSPredicate(format: "#size = nil")