Z_PK Column in Core Data Database

Question

Is it possible to fetch the number from the Z_PK column created by Core Data? If so, would you fetch this column the same way you would fetch attributes you created manuall

Answer 1

The z_pk is not an attribute that you can fetch like any other the other attributes. What you can do is to extract the z_pk value from the managedObjectIDof your entity

The managedObjectID can be obtained using [self objectID]. For this example we take this one:

   /p5>

The p5 at the end is the z_pk. (For this store, and for this entity, at at this time. It can change)

Not sure what you need the z_pk for, nor in what format. Let's convert the managedObjectID into a string:

   NSString *aString = [[[self objectID] URIRepresentation] absoluteString];

From the string extract the 5:

   NSArray *theComponents = [aString componentsSeparatedByString:@"/p"];
   NSInteger theZpk = [[theComponents lastObject] intValue];

Now you have the z_pk as an int and can process it as you like.