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Timothy Holmes
1,617 PointsCore Data Deep Dive: Cant find "Pun" entity with entityForName:@"Pun"
I'm getting this error:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name 'Pun''
When a run the app using an all exceptions breakpoint then it appears that this line is throwing the error:
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Pun" inManagedObjectContext:self.managedObjectContext];
It's as if the "Pun" entity doesn't exist, but it I have it and it has a name and is assigned the Pun class.
There something happening outside of the implementation of ListViewController because I copied Amit's ListViewController.m code into my file and I'm still getting the error.
1 Answer
Timothy Holmes
1,617 PointsWell...after comparing my code to the project files listed here, I found I missed a step early on. I forgot to implement the managedObjectContext method in AppDelegate.m so my app was not creating an instance of a Managed Object Context.
It's a good thing Xcode creates this for for you in a Master/Detail record with Core Data checked.