ios – Replace a selected merchandise saved with CoreData

Please excuse me if I am utilizing the unsuitable nomenclature of issues, however that is the primary time I am utilizing CoreData.
I am enhancing textual content in one of many objects saved utilizing CoreData. The best way it really works on the app is when tapping on an merchandise in an inventory, a sheet pops up with the textual content that’s already there, and if modified, saves the brand new textual content.

I am scuffling with how one can cross the proper merchandise to the sheet, after which how one can replace the proper merchandise. How do you do that? I am undecided how passing information works.

This is what I labored out thus far:

struct ContentView: View {

    @FetchRequest(entity: Jot.entity(), sortDescriptors: [NSSortDescriptor(keyPath: Jot.date, ascending: false)])
    var jots: FetchedResults<Jot>

    @State var selectedJot: Jot
    @State var isNew = false

    var physique: some View {
        NavigationView {
            Listing(jots) { jot in
                Textual content(jot.textual content ?? "")
                .onTapGesture() {
                    self.selectedJot = jot
                    isNew = false
                }
            }
            .listStyle(.plain)
            .toolbar {
                ToolbarItem(placement: .bottomBar) {
                    Spacer()
                }
                
                ToolbarItem(placement: .bottomBar) {
                    Button(motion: {
                        isNew = true
                        self.sheetNewNote.toggle()
                        selectedItem = 0
                    }) {
                        Picture(systemName: "sq..and.pencil")
                    }
                }
            }
            .sheet(merchandise: $selectedJot) { jot in
                SheetView(isNewItem: $isNew, currJot: self.$selectedJot) // I get error Can not convert worth of kind 'Binding<Jot>' to anticipated argument kind 'Binding<Merchandise?>'
            }
            .sheet(isPresented: $sheetNewNote) {
                    SheetView(isNewItem: $isNew, currJot: self.$selectedJot) // no error right here
            }
        }
    }


    struct SheetView: View {
        @Setting(.presentationMode) var presentationMode
        
        @Binding var isNewItem: Bool
        @Binding var currJot: Jot

        @State var textual content: String = ""

        var physique: some View {
            NavigationView {
                 VStack {
                    TextEditor(textual content: $textual content)
                    .onAppear() {
                        if isNewItem {
                            textual content = currJot.textual content!
                        }
                    }
                    HStack {
                        Button("Cancel") {
                            presentationMode.wrappedValue.dismiss()
                        }

                        Spacer()

                        Button("Save") {
                            if isNewItem {
                                // create a brand new merchandise and reserve it with attempt viewContext.save()
                            } else {
                                // we're enhancing a present merchandise
                                updateJot(updatedJot: currJot)
                                attempt? viewContext.save()
                            }

                            presentationMode.wrappedValue.dismiss()
                        }
                    }
                 }
            }
        }


        // Updates the merchandise
        func updateJot(updatedJot: Jot){
            if let jot = getById(id: updatedJot.objectID){
                jot.textual content = updatedJot.textual content
            }
        }
        
        // Will get a merchandise by id
        func getById(id: NSManagedObjectID) -> Jot? {
            return viewContext.object(with: id) as? Jot
        }

    }
}

EDIT:

attempting to grasp extra about how CoreData and SwiftUI work. Primarily based on the remark beneath, I ought to use @ObservableObject however after I went on the lookout for extra info, I could not discover any definitive examples.
This text additionally made much more complicated to me.

So, query nonetheless: how so I replace an merchandise already current through a sheet?

This, nevertheless, appears promising… I simply want to grasp what they did and see if I can replicate it on my code.