Fix #3958. Bug where reassigning type class would incorrectly assign occurrence classes.

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

@@ -92,7 +92,10 @@ class ReassignClass(bpy.types.Operator):
         return IfcStore.execute_ifc_operator(self, context)
 
     def _execute(self, context):
-        objects = [bpy.data.objects.get(self.obj)] if self.obj else context.selected_objects
+        if self.obj:
+            objects = [bpy.data.objects.get(self.obj)]
+        else:
+            objects = set(context.selected_objects + [context.active_object])
         self.file = IfcStore.get_file()
         predefined_type = context.scene.BIMRootProperties.ifc_predefined_type
         if predefined_type == "USERDEFINED":
@@ -101,11 +104,9 @@ class ReassignClass(bpy.types.Operator):
             product = ifcopenshell.api.run(
                 "root.reassign_class",
                 self.file,
-                **{
-                    "product": self.file.by_id(obj.BIMObjectProperties.ifc_definition_id),
-                    "ifc_class": context.scene.BIMRootProperties.ifc_class,
-                    "predefined_type": predefined_type,
-                },
+                product=self.file.by_id(obj.BIMObjectProperties.ifc_definition_id),
+                ifc_class=context.scene.BIMRootProperties.ifc_class,
+                predefined_type=predefined_type,
             )
             obj.name = "{}/{}".format(product.is_a(), getattr(product, "Name", "None"))
             tool.Ifc.link(product, obj)

src/ifcopenshell-python/ifcopenshell/api/root/reassign_class.py

@@ -80,11 +80,12 @@ class Usecase:
                 element.ObjectType = self.settings["predefined_type"]
         if element.is_a("IfcTypeProduct"):
             for typed_element in ifcopenshell.util.element.get_types(element) or []:
+                ifc_class = self.settings["ifc_class"].removesuffix("Type").removesuffix("Style")
                 ifcopenshell.api.run(
                     "root.reassign_class",
                     self.file,
                     product=typed_element,
-                    ifc_class=self.settings["ifc_class"].strip("Type"),
+                    ifc_class=ifc_class,
                     predefined_type= self.settings["predefined_type"]
                 )
         return element