Can't query for the existence of an optional to-one relationship?

Question

Hi,

say in my model I have members and each member optionally can have a relationship to a Club. So the relationship in the Member entity would be modelled like so: @Relationship(.nullify, inverse: \Club.members) var club: Club?

Now I would like to fetch al Members with no Club relationship. I would assume that this would work with a predicate like this:

let noClubPred = #Predicate<Member> { member in
   member.club == nil
}

Unfortunately this gives me the following error when compiling: Generic parameter 'RHS' could not be inferred.

Has anybody an idea how to phrase this predicate correctly, or is this a beta issue and it should actually work?

Thank you!

Cheers, Michael

861

Posted by

milutz

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Answer 1

The same here

Posted by

Awaking

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Answer 2

Does

let nilClub: Club? = nil
let noClubPred = #Predicate<Member> { member in 
    member.club == nilClub
}

work?

Posted by

richard_aurbach

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Can't query for the existence of an optional to-one relationship?

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