Cannot serialize interface with [SerializeReference]

Question

I don't know why, but this code is just not working, the inspector won't allow me to serialize my interface.

 public class OnSpawnActionsContainer : MonoBehaviour
 {
     public List<ISpawnedAction> Actions => _actions;
     
     [SerializeReference]
     private List<ISpawnedAction> _actions;
 }

I also tried code from the API page of [Serialize Reference], just copied and pasted, but it wouldn't work either. https://docs.unity3d.com/ScriptReference/SerializeReference.html

Answer 1

Answer by iohouse · Nov 06, 2021 at 07:10 AM

You'll have to do just this:

 [SerializeReference]
 public List<ISpawnedAction> Actions;

Or something like this (following your public/private example):

 public List<ISpawnedAction> Actions => _actions;
 
 [SerializeField, SerializeReference]
 private List<ISpawnedAction> _actions;

The problem here is not with the Interface... since Unity does not serialize Properties (a member with getter/setter) you'll have to compromise on how you write your code a bit (you could use some custom script to work with a serialized Property though; its just not handled by Unity by default).

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akilaydin2 · Nov 06, 2021 at 07:28 AM 0

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Making the field public is not helping. Editor does not draw my List

iohouse akilaydin2 · Nov 06, 2021 at 01:48 PM 0

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I didn't mention anything about the accessor having to do with the issue - just that it's declared as a Property. Both of the examples I provided work (the one with just a public Actions declared, and the other with both a public Property and a private member variable that is serialized to be viewable in the Inspector). Inspector Screenshot

Cannot serialize interface with [SerializeReference]

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