Errors after 'Create NSManagedObject Subclass for CoreData Entities

Question

I have created 2 core data entities and then created NSManagedObject Subclasses for them from the editor menu.

However when I run my app I get errors on every line of all the files for some reason.

Here is an example, these errors are the same for both entities created files.

File Code was auto generated so i can apste it here but not sure of its use

    import Foundation
import CoreData


extension UserExercise {

    @nonobjc public class func fetchRequest() -> NSFetchRequest<UserExercise> {
        return NSFetchRequest<UserExercise>(entityName: "UserExercise");
    }

    @NSManaged public var id: Int16
    @NSManaged public var name: String?
    @NSManaged public var reps: Int16
    @NSManaged public var sets: Int16
    @NSManaged public var weight: Int16
    @NSManaged public var relationship: NSSet?

}

// MARK: Generated accessors for relationship
extension UserExercise {

    @objc(addRelationshipObject:)
    @NSManaged public func addToRelationship(_ value: UserRoutine)

    @objc(removeRelationshipObject:)
    @NSManaged public func removeFromRelationship(_ value: UserRoutine)

    @objc(addRelationship:)
    @NSManaged public func addToRelationship(_ values: NSSet)

    @objc(removeRelationship:)
    @NSManaged public func removeFromRelationship(_ values: NSSet)

}

Errors are:

Command/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc failed with exit code 1

Invalid redeclaration of 'UserRoutine' 'UserExercise' is ambiguous for type lookup in this context @NSManaged only allowed on an instance property or method

Theres too many to list its basically these repeated over and over

Th error message extensions may not contain stored properties is pretty clear: You cannot declare @NSManaged properties in a class extension. — vadian
This wasnt anything to do with me though, these are auto generated files from swift from an entity? why would it generate broken error filled files? I have watched tutorials using this method and their files generated without issue — infernouk
if you created the subclasses yourself you must set the Codegen popup in the Core Data model to Manual/None — vadian
By created subclasses myself how do you mean? As i used the swift auto generated option ion editor, i didnt make these files myself, just built the entities in the xcdatamodelid — infernouk

Niklas Berglund Niklas Berglund · Accepted Answer · 2016-12-06T09:33:05

Xcode by default manage generation of these subclasses for you. If you want to manage generation of them yourself then:

Select your entities in the data model.
Find Codegen in the utilities pane(right pane) and set it to Manual/None.
Clean and build.

Errors after 'Create NSManagedObject Subclass for CoreData Entities

6 Answers