will the Guid of a Prefab always stay the same?

Code (CSharp):

1. var res = AssetDatabase.FindAssets("t:GameObject", new string[] { "Assets" });
2.         foreach (var Guid in res)
3.         {
4.      //will the Guid always be the same? Even if I close the editor or drag the GameObject to an other path?
5.         }

Sure I could test, it but it seems to be the same after restarting, but I don't want to crash my whole project because I find out at some point that the Guid can randomly change.

 

If guid changes and file path changes, unity will threat it as another prefab. If only one of those, it will be threated as same object. Guid may change if you delete metafile or reimport all. And may not. You'd better do not rely on this. Check out the new Addressables package https://docs.unity3d.com/Packages/com.unity.addressables@0.8/manual/index.html

 

k ty

 

If you're using source control (which you really should be), a GUID change will show up as a change in GIT. So you'll know if a GUID has changed.

 

What @Carwashh said... put your project under git right now, it's easy. Think of it as a save game cartridge for developers.

The easiest way to inadvertently change a GUID is if you duplicate an object (or bunch of objects) outside of Unity.

When Unity regains focus it will see the dupes and reassign half of them, and if it's the ones you were already using, you'll have broken links.

If you dupe or move stuff, dupe or move it from within the Unity project window.

 

I believe the GUID is how Unity tracks stuff for itself. For instance, when you drag a reference into a public field in the inspector, you're actually assigning a GUID. As long as that reference is still valid, the GUID is still valid.

If you configure Unity to save *.meta files for your assets (which you normally have to do if you're using version control), then the GUID is stored in that *.meta file. As long as you keep that meta file with the asset, the GUID will be there. If you delete the meta file, or move the asset without moving the meta file, that's when references will break.