See #6570. Formula column minor improvements and documentation

src/ifc5d/Ex8 - BoQ with formula.csv

@@ -0,0 +1,14 @@
+Index,Identification,Name,Unit,Value,Quantity,Query,Property,Formula
+1,E.01,Walls,m3,,,,,
+2,E.01.01,Ground floor walls,m3,100,,"IfcWall, location=""Ground Floor""",GrossVolume,
+2,E.01.02,First floor walls,m3,200,,"IfcWall, location=""First Floor""",GrossVolume,
+1,A.02,Paintings,m2,,,,,
+2,A.03,Paintings with water,m2,,,,,
+3,B.05,White paintings,m2,25,,IfcWall,GrossVolume,
+3,B.06,Colored paintings,m2,32,33,,,
+3,B.07,Double paintings,m,,,IfcWall,,NetSideArea*2
+2,C-01,Paintings with machine,m2,17,133,,,
+2,C-02,Decorated paintings,m2,40,8,,,
+1,D,Reinforcements,,,,,,
+2,D.1,Walls reinforcements weight,kg,,,IfcWall,,Pset_ConcreteElementGeneral.ReinforcementVolumeRatio * GrossVolume
+2,D.2,Beams reinforcements weight,kg,,,,,

src/ifc5d/README.md

@@ -39,6 +39,7 @@ See example files as a CSV file format reference:
 - Ex5 - SoR_with_description.csv (a simple SoR with description column)
 - Ex6 - BoQ with categories.csv (a simple BoQ with categories columns)
 - Ex7 - BoQ with Rates.csv (a simple BoQ that connect to an existing SoR. It needs an already loaded SoR.)
+- Ex8 - Boq with formula.csv (a simple BoQ with formula field used to calculate quantities when specified)
 - `sample_cost_schedule_house_FR.csv` / `.ods`
 - `schedule.csv`, `rates.csv` (schedule of rates example)
 

src/ifc5d/ifc5d/csv2ifc.py

@@ -412,16 +412,13 @@ class Csv2Ifc:
                 results = ifcopenshell.util.selector.filter_elements(self.file, cost_item["Query"])
                 results = [r for r in results]
                 ifc_quantity_class = ifcopenshell.util.unit.get_symbol_quantity_class(cost_item["Unit"])
-                try:
-                    quantity = ifcopenshell.api.cost.assign_cost_item_quantity(
-                        self.file,
-                        cost_item=cost_item["ifc"],
-                        products=results,
-                        formula=cost_item["Formula"],
-                        ifc_class=ifc_quantity_class,
+                quantity = ifcopenshell.api.cost.assign_cost_item_quantity(
+                    self.file,
+                    cost_item=cost_item["ifc"],
+                    products=results,
+                    formula=cost_item["Formula"],
+                    ifc_class=ifc_quantity_class,
                     )
-                except:
-                    quantity=0
 
         self.create_cost_items(cost_item["children"], cost_item["ifc"])