Read Write ScriptableObject in ProjectSettings Folder.

Questions & Answers
1

I need read/write ScriptableObject in ProjectSettings Folder to save my editor extension’s per-project settings like unity official project settings did.

I’ve tried :

settings = ScriptableObject.CreateInstance<MyPlugin>();
AssetDatabase.LoadAssetAtPath<MyPlugin>("ProjectSettings/MyPlugin.asset");
AssetDatabase.CreateAsset(settings, "ProjectSettings/MyPlugin.asset"); 

AssetDatabase.LoadAssetAtPath<MyPlugin>("<OtherFolder>/MyPlugin.asset");
AssetDatabase.CreateAsset(settings, "<OtherFolder>/MyPlugin.asset");

It doesn’t work with error:
UnityEngine.UnityException: Creating asset at path ProjectSettings/MyPlugin.asset failed.
at (wrapper managed-to-native) UnityEditor.AssetDatabase:CreateAsset (UnityEngine.Object,string)
at MyPlugin…cctor () [0x00033] in …
UnityEditor.EditorAssemblies:SetLoadedEditorAssemblies(Assembly)

It seems that all apis in AssetDatabase can only read / write “Assets” folder. If so, why keep "Assets" in Path? If not so, how to read write folder in project folder other than “Assets” folder?

Please help. Thanks.

2

Yes unfortunately those API points only work with files in the Assets folder, though I can’t comment as to why they therefore still require specification of the Assets folder in the supplied path.

If you want to read/write files in the Project Settings folder, I would suggest you consider .NET standard file I/O in combination with Unity’s JsonUtility. That said, you’d have to do some engineering if you need to detect external changes to the file and so on.