'+entityForName: nil is not a legal NSManagedObjectContext parameter - Core Data

Question

I have added all of the relevant code to the App Delegate, and I am able to add to the data model and fetch from the data model in applicationDidFinishLaunchingWithOptions.<

Answer 1

I got this problem and a colleague helped me out. If you got this error message: "entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name". And you made changes in you coredata model. I think the problem might not be the code.

The solution can be simple. Try one of those options:

• Just delete the app from the device you are testing, it should have the old version of your model.
• Create another database version using Xcode, >Editor>Add Model Version.

Hope it helps.