Questions:
I am getting below compilation error
Realm model classes must either extend RealmObject or implement
RealmModel to be considered a valid model class
In this particular scenario
class Animals extends RealmObject {
}
class Dog extends Animals {
}
I am getting this error for the Dog class.
That error appears when I am indirectly extending RealmObject. i.e Dog is extending Animals (which in turns extends RealmObject), not RealmObject directly.
How to&Answers:
Inheritance / Polymorphism is still an open issue in Realm,
Check this link https://github.com/realm/realm-java/issues/761
Answer：
While the issue has not been closed yet, it is recommended to use composition instead of inheritance: F.ex. you could have
public interface Animalistic {
makeNoise();
}
which is then implemented by each animal.
Tags: androidandroid, class, object
