SwiftUI cannot update CoreData Entity Object - ios

Question

I am facing a very weird bug, I have a edit function which will accept the object and new form data from the frontend, the function can be executed without errors but the issue is the data is not updated at all. I tried reopen the simulator and refetch also no use to this. May I ask how to solve this?
class RoomDataController: ObservableObject {
#Published var rooms: [Room] = []
let container = NSPersistentContainer(name: "RentalAppContainer")
init() {
container.loadPersistentStores { description, error in
let current = FileManager.default.currentDirectoryPath
print(current)
if let error = error {
print("Failed to load data in DataController \(error.localizedDescription)")
}
}
fetchRooms()
}
func save(context: NSManagedObjectContext) {
do {
try context.save()
print("Data created or updated successfully!")
} catch {
// Handle errors in our database
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
func editRoom(room: Room, roomType: String, roomDescription: String, contactPeriod: String, roomPrice: Float, userID: UUID, isShort: Bool, isLong: Bool, images: String, email: String, phoneNum:String, context: NSManagedObjectContext) {
room.roomType = roomType
room.roomPrice = roomPrice
room.roomDescription = roomDescription
room.contactPeriod = contactPeriod
room.contactEmail = email
room.contactNum = phoneNum
room.updated_at = Date()
print("room to be edited: ", room)
save(context: container.viewContext)
fetchRooms()
}
}
The Frontend View that call the edit function
struct EditRoomView: View {
#EnvironmentObject var userAuth: UserAuth
#State var type: String = ""
#State var description: String = ""
#State var price: String = ""
#State var contactPeriod: String = ""
#State var isShort: Bool = false
#State var isLong: Bool = false
#State var email: String = ""
#State var phoneNum: String = ""
#ObservedObject var room: Room
private func editItem() {
RoomDataController().editRoom(
room: room,
roomType: self.type,
roomDescription: self.description,
contactPeriod: self.contactPeriod,
roomPrice: Float(self.price)!,
userID: userAuth.user.id!,
isShort: self.isShort,
isLong: self.isLong,
images: "room-1,room-2,room-3",
email: email,
phoneNum: phoneNum
)
}
init(room: Room){
self.room = room
_type = State(initialValue: room.roomType!)
_description = State(initialValue: room.roomDescription!)
_price = State(initialValue: String( room.roomPrice))
_contactPeriod = State(initialValue: room.contactPeriod!)
_email = State(initialValue: room.contactEmail!)
_phoneNum = State(initialValue: room.contactNum!)
if room.contactPeriod == "Short"{
_isShort = State(initialValue:true)
_isLong = State(initialValue: false)
} else {
_isShort = State(initialValue: false)
_isLong = State(initialValue:true)
}
}
var body: some View {
VStack{
HStack {
Spacer()
VStack {
Menu {
Button {
// self.selectedTab = .AccountViewTab
} label: {
NavigationLink(destination: AccountView().environmentObject(userAuth), label: {Text("My Profile")})
Image(systemName: "arrow.down.right.circle")
}
Button {
userAuth.isLoggedin = false
} label: {
Text("Log Out")
Image(systemName: "arrow.up.and.down.circle")
}
} label: {
Text("Menu").foregroundColor(Color.black)
}
}
Spacer()
VStack {
NavigationLink(destination: OwnerNavbarView().environmentObject(userAuth), label: {Text("Room Rent").foregroundColor(Color.black)})
}
.onTapGesture {
}
Spacer()
VStack {
NavigationLink(destination: OwnerNavbarView(nextView: "PostRoomHistoryViewTab").environmentObject(userAuth), label: {Text("Post History").foregroundColor(Color.black)})
}
.onTapGesture {
}
Spacer()
VStack {
NavigationLink(destination: OwnerNavbarView(nextView: "CustomerOrderViewTab").environmentObject(userAuth), label: {Text("Customer Orders").foregroundColor(Color.black)})
}
.onTapGesture {
}
Spacer()
}
.padding(.bottom)
.background(Color.gray.edgesIgnoringSafeArea(.all))
Text("Edit Room Details")
Form {
Section(header: Text("Room Type") ) {
TextField("", text: self.$type)
}
Section(header: Text("Room Description") ) {
TextField("", text: self.$description)
}
MultipleImagePickerView()
Section(header: Text("Room Price") ) {
TextField("", text: self.$price)
}
Section(header: Text("Contact Period") ) {
HStack{
Toggle( "Short", isOn: $isShort )
Toggle("Long", isOn: $isLong )
}
}
Section(header: Text("Contact Email Address * :") ) {
TextField("", text: self.$email)
}
Section(header: Text("Contact Mobile No * :") ) {
TextField("", text: self.$phoneNum)
}
}
Button(action: {
self.editItem()
}) {
HStack {
Text("Update")
}
.padding()
.scaledToFit()
.foregroundColor(Color.white)
.background(Color.blue)
.cornerRadius(5)
}
}
}
}
Ok..Managed to solve this in this way, buy why?
do {
fetchRequest.predicate = NSPredicate(format: "id == %#", room.id?.uuidString as! CVarArg)
let result = try container.viewContext.fetch(fetchRequest)
result[0].roomType = roomType
result[0].roomPrice = roomPrice
result[0].roomDescription = roomDescription
result[0].contactPeriod = contactPeriod
result[0].contactEmail = email
result[0].contactNum = phoneNum
result[0].updated_at = Date()
} catch {
print ("fetch task failed", error)
}
if room.ownerID == userID.uuidString {
save(context: container.viewContext)
fetchRooms()
}