Merge pull request #7543 from falken10vdl/MEP-ports

Simplified handling of Ports in MEP
Addresses https://community.osarch.org/discussion/comment/27740#Comment_27740

src/ifcopenshell-python/ifcopenshell/api/project/append_asset.py

@@ -381,6 +381,7 @@ class Usecase:
     def append_type_product(self):
         self.whitelisted_inverse_attributes = {
             "IfcObjectDefinition": ["HasAssociations"],
+            "IfcDistributionElementType": ["IsNestedBy"],
             self.base_material_class: ["HasExternalReferences", "HasProperties", "HasRepresentation"],
             "IfcRepresentationItem": ["StyledByItem", "LayerAssignment"],
             "IfcRepresentation": ["LayerAssignments"],
@@ -397,6 +398,7 @@ class Usecase:
             "IfcObjectDefinition": ["HasAssociations"],
             "IfcObject": ["IsDefinedBy.IfcRelDefinesByProperties"],
             "IfcElement": ["HasOpenings"],
+            "IfcDistributionElement": ["IsNestedBy"],
             self.base_material_class: ["HasExternalReferences", "HasProperties", "HasRepresentation"],
             "IfcRepresentationItem": [
                 "StyledByItem",
@@ -569,6 +571,8 @@ class Usecase:
             return False
         elif element.is_a("IfcRoot") and self.by_guid(element.GlobalId) is not None:
             return False
+        elif element.is_a("IfcDistributionPort"):
+            return False
         elif element.is_a(self.target_class):
             return True
         elif self.target_class == "IfcProduct" and element.is_a("IfcTypeProduct"):

src/ifcopenshell-python/ifcopenshell/api/system/disconnect_port.py

@@ -65,8 +65,6 @@ def disconnect_port(file: ifcopenshell.file, port: ifcopenshell.entity_instance)
     rels += port.ConnectedFrom or ()
 
     for rel in rels:
-        rel.RelatingPort.FlowDirection = None
-        rel.RelatedPort.FlowDirection = None
         history = rel.OwnerHistory
         file.remove(rel)
         if history: