Fix #3996. Reassigning occurrences or types now also reassigns the correlating occurrence or type.

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

@@ -103,17 +103,33 @@ class ReassignClass(bpy.types.Operator):
         predefined_type = context.scene.BIMRootProperties.ifc_predefined_type
         if predefined_type == "USERDEFINED":
             predefined_type = context.scene.BIMRootProperties.ifc_userdefined_type
+        reassigned_elements = set()
         for obj in objects:
             product = ifcopenshell.api.run(
                 "root.reassign_class",
                 self.file,
-                product=self.file.by_id(obj.BIMObjectProperties.ifc_definition_id),
+                product=tool.Ifc.get_entity(obj),
                 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)
+            reassigned_elements.add(product)
+            obj.name = tool.Loader.get_name(product)
             obj.BIMObjectProperties.is_reassigning_class = False
+
+        dependent_elements = set()
+        for reassigned_element in reassigned_elements:
+            if reassigned_element.is_a("IfcTypeObject"):
+                dependent_elements.update(ifcopenshell.util.element.get_types(product))
+            else:
+                element_type = ifcopenshell.util.element.get_type(product)
+                if element_type:
+                    dependent_elements.add(element_type)
+                    dependent_elements.update(ifcopenshell.util.element.get_types(element_type))
+
+        for dependent_element in dependent_elements:
+            obj = tool.Ifc.get_object(dependent_element)
+            if obj:
+                obj.name = tool.Loader.get_name(dependent_element)
         return {"FINISHED"}
 
 

src/blenderbim/blenderbim/tool/loader.py

@@ -61,7 +61,7 @@ class Loader(blenderbim.core.tool.Loader):
 
     @classmethod
     def get_name(cls, element):
-        return "{}/{}".format(element.is_a(), element.Name)
+        return "{}/{}".format(element.is_a(), getattr(element, "Name", "None"))
 
     @classmethod
     def link_mesh(cls, shape, mesh):