Scriptable Object and Polymorphism

Questions & Answers
1

So I have a scriptable object which has a list of BaseClass. However, there are other classes that I wrote which inherits from the BaseClass. So I decided to use Polymorphism and shove everything in that list. For a second, I thought everything was going fine… BUT, after I restarted unity, all the objects that were inherited from the base class turned into base classes. (I cant type cast it, and gives me an error “cannot cast from source type to destination type”)

I suspect this is a problem from serialization or a problem on how I import my objects…
This is how I import it:

itemListData = (ItemDatabase)AssetDatabase.LoadAssetAtPath(currentItemListLocation, typeof(ItemDatabase));

And this is my database class

public class ItemDatabase : ScriptableObject {
    public List<BaseClass> itemList = new List<BaseClass>();
    
}
2

Late answer, but in modern versions of Unity you can find SerializeReferenceAttribute (Unity - Scripting API: SerializeReference), which will help to serialize entities with support of their polymorphism. Also look at serialization rules and read all restrictions patiently. There are some undocumented features/bugs in serialization system, but in the most cases you won’t even feel them.