Unity_Load-ScriptableObject-from-assets2

//You can load a ScriptableObject directly from the folders and save it to a variable
//In this example the ScriptableObject is loaded and stored in a variable when a scriptableobject is modified, only in the unity editor

public class Collectable : ScriptableObject
{

#if UNITY_EDITOR

    //OnValidate is called whenever the file is modified
    private void OnValidate()
	{
        Collectables.Instance.AddCollectable(this);
	}
#endif
}


public class Collectables : MonoBehaviour
{

	[SerializeField] private List<Collectable> collectables;

//singleton
	private static Collectables _instance;
	public static Collectables Instance
	{
		get
		{
			if (_instance == null)
				_instance = FindObjectOfType<Collectables>();
			return _instance;
		}
	}


#if UNITY_EDITOR
	public void AddCollectable(Collectable collectable)
	{
    //Here all nulls are removed and the new scriptableobject is added  //////////////////////////////////
    //It is important to remember that every time a scriptableobject is removed, it is necessary to modify another scriptableobject to remove the null
    //it is possible to handle this using try cat. Or removing all nulls from the list on startup
    
    //An interesting way to solve it is using the script that is run when compiling the project. Calling a function to remove nulls, see PreBuild script.

    
		collectables.RemoveAll(x => x == null);
		if (!collectables.Contains(collectable))
		{
			collectables.Add(collectable);
			Debug.Log("<color=Lime>" + collectable + " Added to list</color>");
		}
	}
#endif
}