CODEWITHSUNDEEP
iosobjective-cxcodecore-datamogenerator
Robert Audi
Robert Audi

Reputation: 8477

Exception when calling insertInManagedObjectContext:

I am creating a Reddit client for iOS for learning purposes. I am using CoreData, which I set up by following the CoreData Basics NSScreencast and I used Mogenerator to generate the model files.

I added a breakpoint to catch all exceptions and when I call the insertInManagedObjectContext: class method provided by Mogenerator, the app crashes on the following line:

return [NSEntityDescription insertNewObjectForEntityForName:@"AZRedditAccount" inManagedObjectContext:moc_];

This line is in the model that Mogenerator generated (_AZRedditAccount). When I look at the Variables View, I noticed an odd line which I don't really understand...

Odd line in the Variables View

What do I need to do to make things work please?

Edit: Here is what I have in my .xcdatamodeld file:

My .xcdatamodeld file

Edit 2: I added the whole project to Github, thought it might help solve the problem: https://github.com/AzizLight/Reddit

Upvotes: 1

Views: 342

Answers (1)

Karl
Karl

Reputation: 1233

If you debug you see that your ManagedObjectContext (MOC) has no assigned PersistentStoreCoordinator (PSC) and therefore not model. In AZRedditDataModel.m you're initializing the PSC, but you're not retaining it (lines 84-109). If there's no model, the context cannot create any entities, because there's no "blueprint".

Upvotes: 3

Related Questions