CODEWITHSUNDEEP
iosswiftcore-dataswift3nsfetchedresultscontroller
Joseph Astrahan
Joseph Astrahan

Reputation: 9072

NSFetchedResultsController Crash When Setting the Controller

Here is my code I'm running and I used console messages to pinpoint that it crashes right when the let frc command is running. Interestingly enough I have another project where I'm using more or less the same code and it works but I can't tell what I'm doing any differently. Was hoping maybe someone here had some possible insight into this?

//Create fetchedResultsController to handle Inventory Core Data Operations
    lazy var fetchedResultsController: NSFetchedResultsController<Workorders> = {
        return self.setFetchedResultsController()
    }()
func setFetchedResultsController() -> NSFetchedResultsController<Workorders>{
        print("setFetchedResultsController()")

        let context = gm_getContext()
        let workordersFetchRequest: NSFetchRequest<Workorders> = Workorders.fetchRequest()

        print("set fetch request")

        let frc = NSFetchedResultsController <Workorders>(
            fetchRequest: workordersFetchRequest,
            managedObjectContext: context,
            sectionNameKeyPath: nil,
            cacheName: nil)

        print("set the frc")

        frc.delegate = self

        return frc
    }

I've looked into the documentation for Apple and it says I can set sectionNameKeyPath to nil and cache to nil, so I'm not sure what I'm doing wrong.

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Upvotes: 2

Views: 291

Answers (1)

Vladyslav Zavalykhatko
Vladyslav Zavalykhatko

Reputation: 17354

From the apple documentation:

A fetch request. This must contain at least one sort descriptor to order the result

Upvotes: 3

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