From ea2e46dccb3ad6f8dc92a66f690f2c058a3e28d5 Mon Sep 17 00:00:00 2001
From: "Zheng, Lei" <realthunder.dev@gmail.com>
Date: Wed, 19 Aug 2020 11:36:59 +0800
Subject: [PATCH] Part: allow TaskAttachmentEditor to install attacher
 extension on demand

---
 src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py b/src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py
index cd33e428a5..270d894c55 100644
--- a/src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py
+++ b/src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py
@@ -187,6 +187,12 @@ class AttachmentEditorTaskPanel(FrozenClass):
         self.callback_Apply     = callback_Apply
 
         self.obj = obj_to_attach
+        try:
+            if not self.obj.hasExtension('Part::AttachExtension'):
+                self.obj.addExtension('Part::AttachExtensionPython')
+        except Exception:
+            pass
+
         if hasattr(obj_to_attach,'Attacher'):
             self.attacher = obj_to_attach.Attacher
         elif hasattr(obj_to_attach,'AttacherType'):