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Undo Python Script is not working

The description here seems very clearly, but my test code is not working. The undo entry "My Transaction Test" is in the Undo-History, but it is not undoing the translation. Anyone can help?

 import unreal
 actors = unreal.EditorLevelLibrary.get_selected_level_actors() 
 location = actors[0].get_actor_location()
 with unreal.ScopedEditorTransaction("My Transaction Test") as trans:
     location.z += 28 
     actors[0].set_actor_location(location, False, True)

Maybe I have to explicit set the enter and exit points of the commands to undo? https://api.unrealengine.com/INT/PythonAPI/class/ScopedEditorTransaction.html?highlight=scoped

Product Version: UE 4.21
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asked Feb 08 '19 at 05:59 PM in Using UE4

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avatar image csprance Feb 24 '19 at 05:29 PM

The enter and exit are magic methods that are called when you use the with command so that wouldn't be it.

avatar image Claudio.Alvaro Jul 11 '19 at 01:44 PM

Try using attributes accessible with set_editor_property instead. Something along the lines of:

 actors[0].set_editor_property('actor_location', location)

I believe the undo stack might expect all the bells and whistles that come with the ui commands and set_editor_property/get_editor_property seem to hook into that, as opposed to accessing a property/function directly.

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