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Day 58 - Project 12, part 2 *ISSUE*

Forums > SwiftUI

Hi friends!

The CoreDataProject app keeps crashing on me and provides the following error: Thread 1: "An NSManagedObject of class 'Singer' must have a valid NSEntityDescription."

I've done the Googles and can not figure out how to fix this or what exactly is causing it.

Xcode Version 14.0.1 (14A400) iOS 16 target deploy


When you look at your data model is there an Entity named Singer there?



Yes. It happens when any data model is created. Following along line for line with all topics on Day 57.


SOLVED: As it turns out, I left off the .environment section in the @main part of my app. Easy Fix!!!

import SwiftUI

@main struct CoreDataProjectApp: App { @StateObject private var dataController = DataController() var body: some Scene { WindowGroup { ContentView() .environment(.managedObjectContext, dataController.container.viewContext) } } }


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