Realm - Can't create object with existing primary key value

Question

I have a object Person with many dogs. App has separate page where it shows just dogs and other page where it shows person\'s dogs

My model is as follows

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Answer 1

We don't need TiM's method anymore.

Use add(_:update:).

try realm.write {
    realm.add(objects, update: Realm.UpdatePolicy.modified)
    // OR
    realm.add(object, update: .modified)
}

Realm.UpdatePolicy enums:

error (default)
modified //Overwrite only properties in the existing object which are different from the new values.
all //Overwrite all properties in the existing object with the new values, even if they have not changed

NB: Works on Realm Swift 3.16.1