Optional One to Many relationship support

[omiz]

Is it possible to have a predicate for an optional one to Many relationship?

An example of what I'm trying to achieve is this
I want to get the objects without a relation

class NoteGroup: NSManagedObject {
    var notes: [Note]?
}

class Note: NSManagedObject {
    var group: NoteGroup?
}

let predicate = (\Note.group) == nil

unfortunately that currently doesn't work since NoteGroup is not a primitive type so it can't be passed as a fetch where condition

[ftchirou]

Hey! Thanks for opening this issue. I'll look into adding support for something like this. Will update this issue with my findings.

[ftchirou]

Fixed in 1.4.0.

You should be able to write the following once you update to 1.4.0 @omiz.

let predicate: Predicate<Note> = \Note.group == nil

If you store your predicate in a variable, you may need to explicitly provide the type (as in the example above) to help the compiler disambiguate between \Note.group == nil // => Predicate<Note> and \Note.group == nil // => Bool.