Realm model class implementing RealmModel can't extend another class

[jannispl]

I was planning to have some of my model classes extend an abstract class containing some common properties, however this currently seems impossible:

@RealmClass
open class MyModel(
        @PrimaryKey
        @Required
        open var id: String = "",
) : NetworkModel(), RealmModel

open abstract class NetworkModel
{
    @Ignore
    open var networkFilledFields: Set<String> = HashSet()
}

This part seems to be relevant for this behavior:

realm-java/realm/realm-annotations-processor/src/main/java/io/realm/processor/ClassMetaData.java

Line 105 in e36e69b

if (!parentElement.toString().equals("java.lang.Object") && !parentElement.toString().equals("io.realm.RealmObject")) {

Is there any reason for Realm to assume either Object or RealmObject as parent class?

[beeender]

Realm currently is using byte code manipulation to replace field accessors and using annotation processor to create proxy classes. Enabling RealmObject to extend from the other class/abstract class will increase a bit complexity of Realm. So it is not implemented right now. But I agree it is something we should support.

I will add your comments to #761 and dup/close this issue to that one since they are related.

Thanks a lot for you feedback!