I wanted to add a functionality to my App to store different Times (hour:minute) in an array of my SwiftData Model. And then to also add and remove items from this array. I ran into two problems.

Warning If you don’t provide a predicate, the context will remove all
models of the specified type from the persistent storage.

Warning If you don’t provide a predicate, the context will remove all
models of the specified type from the persistent storage.

static func GetCardsToLearnPredicate() -> Predicate<Card> { let todayMinus3Days: Date = Date.now.addDay(day: -3) let todayMinus7Days: Date = Date.now.addDay(day: -7) let todayMinus14Days: Date = Date.now.addDay(day: -14) let todayMinus30Days: Date = Date.now.addDay(day: -30) return #Predicate<Card> {card in card.box == 1 || (card.box == 2 && card.lastStatusChange >= todayMinus3Days) || (card.box == 3 && card.lastStatusChange >= todayMinus7Days) || (card.box […]

static func GetCardsToLearnPredicate() -> Predicate<Card> { let todayMinus3Days: Date = Date.now.addDay(day: -3) let todayMinus7Days: Date = Date.now.addDay(day: -7) let todayMinus14Days: Date = Date.now.addDay(day: -14) let todayMinus30Days: Date = Date.now.addDay(day: -30) return #Predicate<Card> {card in card.box == 1 || (card.box == 2 && card.lastStatusChange >= todayMinus3Days) || (card.box == 3 && card.lastStatusChange >= todayMinus7Days) || (card.box […]

Use case: I would like to associate subfolders stored in the Application Support Directory on iOS with already saved instances of a SwiftData entity type. If I had a way to represent the primary keys of the entities as a string, I could simply name these subfolders after the primary keys (without the need to generate e.g. random UUID folder names and persist these UUIDs as a field in the entity).

I’m trying to restrict following model to “one per day”. It can reference 2 types of other structs (templet or preset) hence 2 different id’s. And it sets it’s creation day date to same one.

I’m currently working on a simple read operation based on object IDs using SwiftData in my view model. I’m fetching data like this:

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