I’m trying to build a CRUD app using SwiftData, @Query model and multidatepicker. The data from a multidatepicker is stored or persists in SwiftData as Set = []. My current dilemma is how to use SwiftData and @Query model Predicate to find all records on the current date. I can’t find any SwiftData documentation or examples @Query using Set = []. My CRUD app should retrieve all records for the current date. Unfortunately, I don’t know the correct @Query model syntax for Set = [].

How do I filter data using @Query with a Set of DateComponents? I successfully saved multiple dates using a MultiDatePicker in AddView.swift. In ListView.swift, I want to retrieve all records for the current or today’s date. There are hundreds of examples using @Query with strings and dates, but I haven’t found an example of @Query using a Set of DateComponents Nothing will compile and after hundreds and hundreds of attempts, my hair is turning gray. Please, please, please help me. For example, if the current date is Tuesday, March 4 205, then I want to retrieve both records. Since both records contain Tuesday, March 4, then retrieve both records. Sorting works fine because the order by clause uses period which is a Double. Unfortunately, my syntax is incorrect and I don’t know the correct predicate syntax for @Query and a Set of DateComponents. Class Planner.swift file import SwiftUI import SwiftData 
 @Model class Planner { //var id: UUID = UUID() var grade: Double = 4.0 var kumi: Double = 4.0 var period: Double = 1.0 var dates: Set<DateComponents> = [] init( grade: Double = 4.0, kumi: Double = 4.0, period: Double = 1.0, dates: Set<DateComponents> = [] ) { self.grade = grade self.kumi = kumi self.period = period self.dates = dates 
 } } @Query Model snippet of code does not work The compile error is to use a Set of DateComponents, not just DateComponents. @Query(filter: #Predicate<Planner> { $0.dates = DateComponents(calendar: Calendar.current, year: 2025, month: 3, day: 4)}, sort: [SortDescriptor(\Planner.period)]) var planner: [Planner] ListView.swift image EditView.swift for record #1 DB Browser for SQLlite: record #1 (March 6, 2025 and March 4, 2025) 
 
 [{"isLeapMonth":false,"year":2025,"day":6,"month":3,"calendar":{"identifier":"gregorian","minimumDaysInFirstWeek":1,"current":1,"locale":{"identifier":"en_JP","current":1},"firstWeekday":1,"timeZone":{"identifier":"Asia\/Tokyo"}},"era":1},{"month":3,"year":2025,"day":4,"isLeapMonth":false,"era":1,"calendar":{"locale":{"identifier":"en_JP","current":1},"timeZone":{"identifier":"Asia\/Tokyo"},"current":1,"identifier":"gregorian","firstWeekday":1,"minimumDaysInFirstWeek":1}}]
 EditView.swift for record #2 DB Browser for SQLlite: record #2 (March 3, 2025 and March 4, 2025) 
 [{"calendar":{"minimumDaysInFirstWeek":1,"locale":{"current":1,"identifier":"en_JP"},"timeZone":{"identifier":"Asia\/Tokyo"},"firstWeekday":1,"current":1,"identifier":"gregorian"},"month":3,"day":3,"isLeapMonth":false,"year":2025,"era":1},{"year":2025,"month":3,"era":1,"day":4,"isLeapMonth":false,"calendar":{"identifier":"gregorian","current":1,"firstWeekday":1,"minimumDaysInFirstWeek":1,"timeZone":{"identifier":"Asia\/Tokyo"},"locale":{"current":1,"identifier":"en_JP"}}}]
 
 Any help is greatly appreciated.

Any help will be greatly appreciated. Trying to build a calendar/planner app for public school teachers. Classes are held on multiple dates so there is a need for swiftdata to save multiple dates. There are lots of tutorials demonstrating a multidatepicker but none of the tutorials or videos save the dates, via swiftdata. My goal is to save multiple dates. Step 1 is to initialize mockdata; this is done a class called ToDo. var dates:Set = [] Step 2 is the view containing a multidatepicker and other essential code Step 3 is to save multiple dates using swiftdata. Lots of tutorials, code snippets and help using a single date. But after almost 2 weeks of researching youtube tutorials, and google searches, I have not found an answer on how to save multiple dates via swiftdata. Also, I don't know how how to initialize the array of for the mockdata. Here are some code snippets used but the initialization of the array of DateComponenets doesnt work. And saving multiple dates doesn't work either @MainActor @Model class ToDo { var dates:Set<DateComponents> = [] init(dates: Set<DateComponents> = []) { self.dates = dates } } //view struct DetailView: View { @State var dates: Set<DateComponents> = [] @Environment(\.modelContext) var modelContext @State var toDo: ToDo @State private var dates: Set<DateComponents> = [] MultiDatePicker("Dates", selection: $dates) .frame(height: 100) .onAppear() { dates = toDo.dates } Button("Save") { //move data from local variables to ToDo object toDo.dates = dates //save data modelContext.insert(toDo) } } } #Preview { DetailView(toDo: ToDo()) .modelContainer(for: ToDo.self, inMemory: true) }