Reduce boilerplate while using @Query (SwiftData)

Question

Created Jun ’23

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Is it possible to either query a single instance or instruct SwiftData that there should only be a single instance in my model?

I have the following basic structure in a lot of my views to query the first element and use it to display data. There is always only one instance, it is by design.

@Query private var waterData: [WaterData]
    
var body: some View {
    if let data = waterData.first {
        EmptyView()
    } else {
        ContentUnavailableView("Content unavailable", systemImage: "xmark.circle")
    }
}

Is there a way to reduce the boilerplate of if let data = ... in each view?

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Answer 1

BabyJ OP

Jun ’23

I believe it was mentioned in one of the WWDC activities that Query should support returning a single model object. As SwiftData is in its early stages anyway, the engineers are open to any feedback and enhancement requests. I suggest you file a feedback report detailing why you want Query to return a single model object as well as any useful use cases they can tailor to.

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