Core data id auto increment

Question

I found a subject where they're something named objectID to get the auto increment id of every lines of a table, I want to get it and display it, but I don't understand how to do, my code:

    let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
    let context: NSManagedObjectContext = appDel.managedObjectContext

    let newDemande = NSEntityDescription.insertNewObjectForEntityForName("Demandes", inManagedObjectContext: context)
    newDemande.setValue(soapRequest.xmlString, forKey: "xml")
    newDemande.setValue(1, forKey: "statutenvoie")

    do {
        try context.save()
    } catch {
        print("erreur data")
    }

    do {
        let request = NSFetchRequest(entityName: "Demandes")
        let results = try context.executeFetchRequest(request)

        if results.count > 0 {
            for item in results as! [NSManagedObject]{
                let xml = item.valueForKey("xml")
                let statutenvoie = item.valueForKey("statutenvoie")

                print(xml!, statutenvoie!)
            }
        }
    } catch {
        print("erreur data")
    }

Error :

print(item.objectID)

2016-01-07 10:53:22.679 ...[956:28002] CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/informatiqueresponis/Library/Developer/CoreSimulator/Devices/FF92B583-0288-41FE-AD09-718E7E66D457/data/Containers/Data/Application/B851E6CE-C0C9-4FEE-9400-587995198D50/Documents/SingleViewCoreData.sqlite options:(null) ... returned error Error Domain=NSCocoaErrorDomain Code=134100 "(null)" UserInfo={metadata={ NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes = ; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( "" ); NSStoreType = SQLite; NSStoreUUID = "2654FBD8-4C1B-4001-827A-5C9D471B19C4"; "_NSAutoVacuumLevel" = 2; }, reason=The model used to open the store is incompatible with the one used to create the store} with userInfo dictionary { metadata = { NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes = ; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( "" ); NSStoreType = SQLite; NSStoreUUID = "2654FBD8-4C1B-4001-827A-5C9D471B19C4"; "_NSAutoVacuumLevel" = 2; }; reason = "The model used to open the store is incompatible with the one used to create the store"; } 2016-01-07 10:53:22.683 ...[956:28002] Unresolved error Error Domain=YOUR_ERROR_DOMAIN Code=9999 "Failed to initialize the application's saved data" UserInfo={NSLocalizedDescription=Failed to initialize the application's saved data, NSUnderlyingError=0x7a632aa0 {Error Domain=NSCocoaErrorDomain Code=134100 "(null)" UserInfo={metadata={ NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes = ; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( "" ); NSStoreType = SQLite; NSStoreUUID = "2654FBD8-4C1B-4001-827A-5C9D471B19C4"; "_NSAutoVacuumLevel" = 2; }, reason=The model used to open the store is incompatible with the one used to create the store}}, NSLocalizedFailureReason=There was an error creating or loading the application's saved data.}, [NSLocalizedDescription: Failed to initialize the application's saved data, NSUnderlyingError: Error Domain=NSCocoaErrorDomain Code=134100 "(null)" UserInfo={metadata={ NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes = ; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( "" ); NSStoreType = SQLite; NSStoreUUID = "2654FBD8-4C1B-4001-827A-5C9D471B19C4"; "_NSAutoVacuumLevel" = 2; }, reason=The model used to open the store is incompatible with the one used to create the store}, NSLocalizedFailureReason: There was an error creating or loading the application's saved data.] (lldb)

That error is not caused by that line of code. It tells you which method caused the error-- addPersistentStoreWithType:SQLite configuration:URL:options:error: — Tom Harrington

Michal Michal · Accepted Answer · 2016-01-07T09:05:31

I believe you are referring to objectID in the NSManagedObject class:

var objectID: NSManagedObjectID { get }

In your case try:

if results.count > 0 {
        for item in results as! [NSManagedObject]{
            let xml = item.valueForKey("xml")
            let statutenvoie = item.valueForKey("statutenvoie")

            print(item.objectID)
            print(xml!, statutenvoie!)
        }
    }

Core data id auto increment

1 Answers