Great course! This is my solution for Challenge 1 adding delete to the Sights. My code is below for EditDestinationView where I comment out the modelContext property and adjust the deleteSights function. It seems to me that since we're passing in the destination property and declaring it @Bindable that it would bring with it it's reference to the modelContext from DestinationListingView. When I test this, it works as expected, no crashes. Why is this approach not valid? Thank you in advance.

//  EditDestinationView.swift
//  iTour
//
//  Created by Jack Cardinal on 10/18/23.
//

import SwiftUI
import SwiftData

struct EditDestinationView: View {

//    @Environment(\.modelContext) private var modelContext
    @Bindable var destination: Destination
    @State private var newSiteName = ""

    var body: some View {
        Form {
            TextField("Name", text: $destination.name)
            TextField("Details", text: $destination.details, axis: .vertical)
            DatePicker("Date", selection: $destination.date)

            Section("Priority") {
                Picker("Priority", selection: $destination.priority) {
                    Text("Meh").tag(1)
                    Text("Maybe").tag(2)
                    Text("Must").tag(3)
                }
                .pickerStyle(.segmented)
            }

            Section("Sights") {
                ForEach(destination.sights) { sight in
                    Text(sight.name)
                }
                .onDelete(perform: deleteSights)

                HStack {
                    TextField("Add new sight in \(destination.name)", text: $newSiteName)
                    Button("Add", action: addSight)
                }
            }
        }
        .navigationTitle("Edit Destination")
        .navigationBarTitleDisplayMode(.inline)
    }

    func addSight() {
        guard newSiteName.isEmpty == false else { return }

        withAnimation {
            let sight = Sight(name: newSiteName)
            destination.sights.append(sight)
            newSiteName = ""
        }

    }

    func deleteSights(_ indexSet: IndexSet) {
//        for index in indexSet {
//            let sight = destination.sights[index]
//            modelContext.delete(sight)
//        }

        destination.sights.remove(atOffsets: indexSet)
    }
}

#Preview {
    do {
        let config = ModelConfiguration(isStoredInMemoryOnly: true)
        let container = try ModelContainer(for: Destination.self, configurations: config)
        let example = Destination(name: "Example Destination", details: "Example details go here and will automatically expand vertically as they are edited.")

       return EditDestinationView(destination: example)
            .modelContainer(container)

    } catch {
        fatalError("Failed to create model containter.")
    }
}