fix error exporting schedule of rates #4723

Issue occurred when cost item would have no quantities but had controlled objects with quantities.

1) just added a check to ensure that cost_item.CostQuantities are present
2) removed possible None return value in get_cost_item_quantity as it actually will break process_cost_data and it's never used anywhere else
3) has_changed_name was unused
4) fix possible similar issue in cost.data (though _get_object_quantities method is unused)

src/blenderbim/blenderbim/bim/module/cost/data.py

@@ -202,6 +202,9 @@ class CostSchedulesData:
     def _get_object_quantities(cls, cost_item, element):
         if not element.is_a("IfcObject"):
             return []
+        cost_quantities = cost_item.CostQuantities
+        if not cost_quantities:
+            return []
         results = []
         for relationship in element.IsDefinedBy:
             if not relationship.is_a("IfcRelDefinesByProperties"):
@@ -210,7 +213,7 @@ class CostSchedulesData:
             if not qto.is_a("IfcElementQuantity"):
                 continue
             for prop in qto.Quantities:
-                if prop in cost_item.CostQuantities or []:
+                if prop in cost_quantities:
                     results.append(prop.id())
         return results
 

src/ifc5d/ifc5d/ifc5Dspreadsheet.py

@@ -171,26 +171,25 @@ class IfcDataGetter:
                     take_off_name = "mixed-takeoff-quantities"
             return quantity[3]
 
-        if not cost_item:
-            return None
         take_off_name = ""
-        has_changed_name = False
         total_cost_quantity = 0
         accounted_for = []
-        for rel in cost_item.Controls or []:
-            for related_object in rel.RelatedObjects:
-                qtos = ifcopenshell.util.element.get_psets(related_object, qtos_only=True)
-                for quantities in qtos.values() or []:
-                    qto = file.by_id(quantities["id"])
-                    for quantity in qto.Quantities:
-                        if not quantity in cost_item.CostQuantities:
-                            continue
-                        total_cost_quantity += add_quantity(quantity, take_off_name)
-                        accounted_for.append(quantity)
+        cost_item_quantities = cost_item.CostQuantities
+        if cost_item_quantities:
+            for rel in cost_item.Controls or []:
+                for related_object in rel.RelatedObjects:
+                    qtos = ifcopenshell.util.element.get_psets(related_object, qtos_only=True)
+                    for quantities in qtos.values() or []:
+                        qto = file.by_id(quantities["id"])
+                        for quantity in qto.Quantities:
+                            if quantity not in cost_item_quantities:
+                                continue
+                            total_cost_quantity += add_quantity(quantity, take_off_name)
+                            accounted_for.append(quantity)
 
-        for quantity in cost_item.CostQuantities or []:
-            if not quantity in accounted_for:
-                total_cost_quantity += add_quantity(quantity, take_off_name)
+            for quantity in cost_item_quantities:
+                if not quantity in accounted_for:
+                    total_cost_quantity += add_quantity(quantity, take_off_name)
 
         return {
             "id": cost_item.id(),