CODEWITHSUNDEEP
swiftrealm
Mulgard
Mulgard

Reputation: 10609

RLMException: Object type does not match RLMArray type

I have a simple object:

class MyObject : Object {
    dynamic var dummyField: String!;
}

and another object which inherits from MyObject:

class MyOtherObject : MyObject {
    dynamic var anotherDummyField: String!;
}

Now I do the following. I have a Realm List of MyObject and I create an instance of MyOtherObject and try to save it inside the list:

class Operator {
    internal var myObjects: List<MyObject>!;

    internal var myObject: MyObject!;

    func operate() {
        self.myObject = MyOtherObject();
        self.myObject.dummyField = "dummy field";
        self.myObject.anotherDummyField = "another dummy field";

        self.myObjects = List<MyObject>();
        self.myObjects.append(myObject); // crash!
    }
}

It crashes with the error:

Terminating app due to uncaught exception 'RLMException', reason: 'Object type 'MyOtherObject' does not match RLMArray type 'MyObject'.'

Since MyOtherObject is a subclass of MyObject I cannot understand why the app is crashing at this point with this error message.

Upvotes: 2

Views: 1052

Answers (2)

neprocker
neprocker

Reputation: 170

self.myObjects = List<MyObject>();

This is not a proper value

self.myObjects = List<Needs actual object here not class>();

Upvotes: 1

Thomas Goyne
Thomas Goyne

Reputation: 8138

Realm Lists are not covarient. You can only store objects of exactly the declared type in them.

Upvotes: 6

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