Fix bug where related openings are not deleted when you delete a product

src/blenderbim/blenderbim/bim/ifc.py

@@ -57,9 +57,20 @@ class IfcStore:
         blenderbim.bim.handler.subscribe_to(obj, "name", blenderbim.bim.handler.name_callback)
 
     @staticmethod
-    def unlink_element(element, obj=None):
+    def unlink_element(element=None, obj=None):
-        del IfcStore.id_map[element.id()]
+        if element is None:
-        if hasattr(element, "GlobalId"):
+            try:
+                element = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+            except:
+                pass
+
+        if element:
+            del IfcStore.id_map[element.id()]
+        else:
+            del IfcStore.id_map[obj.BIMObjectProperties.ifc_definition_id]
+
+        if element and hasattr(element, "GlobalId"):
             del IfcStore.guid_map[element.GlobalId]
+
         if obj:
             obj.BIMObjectProperties.ifc_definition_id = 0

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

@@ -5,6 +5,7 @@ import ifcopenshell.api
 import ifcopenshell.util.schema
 import ifcopenshell.util.element
 from ifcopenshell.api.geometry.data import Data as GeometryData
+from ifcopenshell.api.void.data import Data as VoidData
 from blenderbim.bim.ifc import IfcStore
 
 
@@ -181,6 +182,7 @@ class UnassignClass(bpy.types.Operator):
             if not obj.BIMObjectProperties.ifc_definition_id:
                 continue
             product = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+            self.remove_voids(product, obj)
             IfcStore.unlink_element(product, obj)
             ifcopenshell.api.run("root.remove_product", self.file, **{"product": product})
             if "/" in obj.name and obj.name[0:3] == "Ifc":
@@ -189,6 +191,12 @@ class UnassignClass(bpy.types.Operator):
                 bpy.data.objects.remove(obj)
         return {"FINISHED"}
 
+    def remove_voids(self, product, obj):
+        if product.id() not in VoidData.products:
+            VoidData.load(self.file, product.id())
+        for opening_id in VoidData.products[product.id()]:
+            bpy.ops.bim.remove_opening(opening_id=opening_id, obj=obj.name)
+
 
 class UnlinkObject(bpy.types.Operator):
     bl_idname = "bim.unlink_object"
@@ -203,7 +211,7 @@ class UnlinkObject(bpy.types.Operator):
             objects = bpy.context.selected_objects
         for obj in objects:
             if obj.BIMObjectProperties.ifc_definition_id:
-                obj.BIMObjectProperties.ifc_definition_id = 0
+                IfcStore.unlink_element(obj=obj)
             if "Ifc" in obj.name and "/" in obj.name:
                 obj.name = "/".join(obj.name.split("/")[1:])
         return {"FINISHED"}

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

@@ -67,7 +67,7 @@ class RemoveOpening(bpy.types.Operator):
             if modifier.type != "BOOLEAN":
                 continue
             if modifier.object and modifier.object.BIMObjectProperties.ifc_definition_id == self.opening_id:
-                modifier.object.BIMObjectProperties.ifc_definition_id = 0
+                IfcStore.unlink_element(obj=modifier.object)
                 if "/" in modifier.object.name and modifier.object.name[0:3] == "Ifc":
                     modifier.object.name = "/".join(modifier.object.name.split("/")[1:])
                 obj.modifiers.remove(modifier)

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

@@ -22,5 +22,7 @@ class Usecase:
                 self.file, **{"product": self.settings["product"], "representation": representation}
             )
             ifcopenshell.api.run("geometry.remove_representation", self.file, **{"representation": representation})
+        for opening in self.settings["product"].HasOpenings or []:
+            ifcopenshell.api.run("void.remove_opening", self.file, opening=opening.RelatedOpeningElement)
         # TODO: remove object placement and other relationships
         self.file.remove(self.settings["product"])

src/ifcopenshell-python/ifcopenshell/api/void/remove_opening.py

@@ -1,3 +1,6 @@
+import ifcopenshell.api
+
+
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file
@@ -15,6 +18,6 @@ class Usecase:
             if rel.RelatingOpeningElement == self.settings["opening"]:
                 to_remove.append(rel)
                 break
-        self.file.remove(self.settings["opening"])
+        ifcopenshell.api.run("root.remove_product", self.file, product=self.settings["opening"])
         for element in to_remove:
             self.file.remove(element)