Resources.FindObjectsOfTypeAll<T> Does not work for imported files from packages.

Unity Engine
1 
 public class SettingsFile: ScriptableObject
    {
        private static SettingsFile _instance;

        public static SettingsFile Instance
        {
            get
            {
                if (_instance != null) return _instance;
             
                _instance = Resources.FindObjectsOfTypeAll<SettingsFile>().FirstOrDefault();
            
                if (_instance != null) return _instance;
            }
        }

If the file is imported from a unity package. This always returns null unless I move the imported file out of the folder to any place in the project. After moving the file anywhere, it finds the instance. Does anyone know of a way around this problem?

1 Like
2

  • Do not use static accessor on a ScriptableObject. Drag the object into a slot where you want to use it.

  • if you really need to then here is how you can do it safely (I don’t recommend it):

  • if you want to check in Editor that one of these are already exists:
    https://docs.unity3d.com/ScriptReference/AssetDatabase.FindAssets.html with the t: search you can check.

But if you want to boot up your static Instance variable, then this way:

#if UNITY_EDITOR
        private void OnEnable()
        {
            EditorApplication.playModeStateChanged += OnPlayStateChange;
        }

        private void OnDisable()
        {
            EditorApplication.playModeStateChanged -= OnPlayStateChange;
        }

        private void OnPlayStateChange(PlayModeStateChange state)
        {
            if(state == PlayModeStateChange.EnteredPlayMode)
            {
                OnBegin();
            }
        }
#else
        private void OnEnable()
        {
            OnBegin();
        }
#endif
        private void OnBegin()
        {
            Instance = this;
        }

This is working both in the Editor and in the build in theory, unless I didn’t mistype something, because it was from the top of my head.

3

Have you seen the Unity Unite talk?
“Overthrowing the MonoBehaviour tyranny in a glorious ScriptableObject revolution”.

This is almost exactly the code unity posted.
Its also how steamVR does it but they load it from the Resources folder.

This is a settings file for In editor use only, so I’ll check out the AssetDatabase.findassets

4

I didn’t realize Resources was a special folder that could be used in any folder like Editor.
I just did what steamVR did, and threw it into a Resources folder, that way I can keep my asset entirely contained in one folder.

5

If it’s editor only, that makes it even easier. Just use the OnEnable. It runs when you create/load the ScriptableObject. It doesn’t run when you go in play mode.
If this is editor only, it is probably a good idea to protect the entire file with #if UNITY_EDITOR in order to not to build into the runtime.

I saw every ScriptableObject thing, I was play with the a lot. That’s why I came to the conclusion to not to allow static accessor to any of them.