Storing a list of enums in firebase

Question

I have the following code:

public class TestClass {
     public ArrayList<ObjectTypes> list = new ArrayList<>();
     public TestClass(){
        list.add(ObjectTypes.type1);
     }
}

public enum ObjectTypes {
   type1,
   type2,
   type3,
   type4,
}

fb.child("Test").setValue(new TestClass());

where fb is a DatabaseReference.

When running the code the application crashes and the following error appears:

com.google.firebase.database.DatabaseException: No properties to serialize found on class ObjectTypes

This problem did not appear in the old Firebase.

The Firebase 2.x depended on Jackson for its JSON serialization. We're aiming to get the main use-case natively supported (with a much smaller footprint in your APK size). If you find a need for a use-case that isn't supported (yet), you can still use Jackson. See http://stackoverflow.com/questions/37547399/how-to-deserialise-a-subclass-in-firebase-using-getvaluesubclass-class/37548330#37548330 — Frank van Puffelen, Jul 15 '16 at 20:38

score 1 · Accepted Answer · answered Oct 01 '16 at 16:20

The problem is currently solved by enumerating the enum elements (enumerating an enum...)

In the above example:

public enum ObjectTypes {
   type1(0),
   type2(1),
   type3(2),
   type4(3),
}

Hopefully an easier less boiler plated way will be added in the future?

Storing a list of enums in firebase

1 Answers1