Fix #2187. ifc_duplicate_operator now recreates the IfcElementAssembly structure into a new Assembly

src/blenderbim/blenderbim/bim/module/geometry/operator.py

@@ -806,6 +806,11 @@ class OverrideDuplicateMove(bpy.types.Operator):
                 if new.is_a("IfcRelSpaceBoundary"):
                     tool.Boundary.decorate_boundary(new_obj)
 
+        # Recreate assembly relationship
+        for old in old_to_new.keys():
+            if old.is_a("IfcElementAssembly"):            
+                OverrideDuplicateMove.recreate_assembly(old_to_new)
+
         # Recreate decompositions
         tool.Root.recreate_decompositions(relationships, old_to_new)
         blenderbim.bim.handler.refresh_ui_data()
@@ -846,6 +851,22 @@ class OverrideDuplicateMove(bpy.types.Operator):
 
         return arrays_to_create, array_children
 
+    @staticmethod
+    def recreate_assembly(old_to_new):
+        for old_element, new_element in old_to_new.items():
+            print(old_element, new_element)
+            old_parent = ifcopenshell.util.element.get_aggregate(old_element)
+            if old_parent:
+                new_parent = old_to_new[old_parent]
+                print(new_parent)
+                blenderbim.core.aggregate.assign_object(
+                                            tool.Ifc,
+                                            tool.Aggregate,
+                                            tool.Collector,
+                                            relating_obj=tool.Ifc.get_object(new_parent[0]),
+                                            related_obj=tool.Ifc.get_object(new_element[0]),
+                                        )
+
 
 class OverrideDuplicateMoveLinkedMacro(bpy.types.Macro):
     bl_idname = "bim.override_object_duplicate_move_linked_macro"