Read Write ScriptableObject in ProjectSettings Folder.

Question

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.

Answer 1

Best Answer

Answer by Adam-Mechtley · Dec 13, 2016 at 08:58 PM

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.

Add comment · Show 4 · Share

WalterCC · Dec 14, 2016 at 04:48 AM 0

Share

Hey, thanks for the reply. The file I/O is ok. But, the problem is we can't instance ScriptableObject saved in folder other than "Assets" folder.

Adam-Mechtley WalterCC · Dec 14, 2016 at 09:45 AM 2

Share

You should be able to do something like this:

Add a readonly singleton property (i.e. getter) to your ScriptableObject class
Inside your singleton property, if the backing field for the singleton is null, create a new instance of your object that will be your singleton
When you create the new singleton to store in the backing field, read the JSON data you wrote to the Project Settings and call JSONUtility.FromJSONOverwrite (), specifying your singleton instance as the object to write the JSON data to
Add appropriate callbacks to the API points on your ScriptableObject to serialize its data back to the JSON file when something is changed

[2]: https://docs.unity3d.com/ScriptReference/$$anonymous$$onoBehaviour.OnValidate.html

WalterCC Adam-Mechtley · Dec 16, 2016 at 03:55 PM 0

Share

Thanks for the solution. I think this is the bast way to do that now, unless unity make some change on that.

dCalle · Jun 11, 2017 at 07:32 PM 0

Share

Exactly, what I was looking for. Thanks ;-)

Read Write ScriptableObject in ProjectSettings Folder.

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions