Base Class Properties not being Deserialized

[frankvHoof93]

I'm trying to use JsonSubTypes to Serialize & Deserialize som sub-classes based on an abstract base-class.
When serializing the data, all of the properties are present in the JSON.
However, when Deserializing the Subclass' Properties are Deserialized, but the Base-Class Properties are not, and are all set to their default values.

Current Implementation:

Base Class:

public interface IDataObject<T>
{
    void SetData(T obj);
}

[JsonConverter(typeof(JsonSubtypes), "WeaponType")]
[Serializable]
public abstract class AWeaponData : IDataObject<AWeapon>
{
    public string WeaponType => GetType().Name;

    [field: SerializeField]
    public float Damage { get; private set; }

    [field: SerializeField]
    public float CurrentCooldown { get; private set; }

    public AWeaponData(AWeapon weapon)
    {
        SetData(weapon);
    }

    [JsonConstructor]
    protected AWeaponData(AWeaponData data)
    {
        Debug.Log("AA");
    }

    public virtual void SetData(AWeapon obj)
    {
        Damage = obj.Damage;
        CurrentCooldown = obj.CurrentCooldown;
    }
}

Example of SubClass:

[Serializable]
public class GunData : AWeaponData 
{
    [JsonConstructor]
    protected GunData(GunData data) : base(data) { }

    public string Test;        

    public GunData(Gun gun) : base(gun)
    { Test = "Test"; }

    public override void SetData(AWeapon obj)
    {
        if (obj as Gun == null)
            throw new InvalidOperationException("Invalid Class-Type");
        base.SetData(obj);
    }
}

I've tried both with a JsonConstructor with & without a parameter. With the parameter the incoming value is NULL.
After Deserializing a GunData-object, the Test-string is set, but the Damage & Cooldown are not.

Is this a bug in my implementation? Or a bug in the JsonSubTypes-Package?

[frankvHoof93]

Addition:
I was able to get it to properly deserialize by using a custom [JsonConstructor] that uses actual parameters for all of the properties that exist in the object. (i.e. GunData(string test, float damage, float currentCooldown) : base(damage, currentCooldown))
However, this seems like a lot of work for something that's normally implemented by default, even with an empty constructor.
Is there a way to do this using settings?

[manuc66]

Hello @frankvHoof93,

Could you please provide details about the JSON payload, specifically regarding AWeaponData and Gun?

Additionally, if possible, could you share a complete sample that can be independently executed?