I am writing an GPS running app that I want to store multiple locations per 'Path' or run.
I am having a little trouble understanding the new concepts of ORM style DBs. 
(I know Core Data uses SQLLite as the underlying mechanism and isn't a true ORM, but that aside..,)
I have two entities setup, 'Path' and 'Location', with a 'To-Many' relationship going from Path>>Location with Cascade Deletion, and an inverse that just has nullify for Delete.

![enter image description here](https://i.stack.imgur.com/36sE0.png)
![enter image description here](https://i.stack.imgur.com/2fLqN.png)

I am doing:

```
//SEND TO CORE DATA
        bdAppDelegate *appDelegate =
        [[UIApplication sharedApplication] delegate];

        NSManagedObjectContext *context =
        [appDelegate managedObjectContext];

        // get GPS lat/lng
        double lat = newLocation.coordinate.latitude;
        double lng = newLocation.coordinate.longitude;

        // insert Path
        Path *currentPathInfo = [NSEntityDescription insertNewObjectForEntityForName:@"Path" inManagedObjectContext:context];
        currentPathInfo.name = currentPathName;
        currentPathInfo.createddate =[NSDate date];

        // insert location/GPS point
        Location *currentPathLocation = [NSEntityDescription insertNewObjectForEntityForName:@"Location" inManagedObjectContext:context];
        currentPathLocation.lat = [NSNumber numberWithDouble:lat];
        currentPathLocation.lng = [NSNumber numberWithDouble:lng];

        // insert 'Location' relationship to 'Path'
        [currentPathInfo addLocationsObject:currentPathLocation];

        NSError *error;
        if (![context save:&error]) {
            NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
        }

```

This is on initial startup (button press)
but then how do I continue to add more 'Locations' that relate to the initial 'Path' without continuing to add more 'Path's as a result of repeating the above code?

In SQL, I'd have a PathID integer (identity) that I'd use for a foreign key in a 'Locations' table to insert locations... I'm having a disconnect...