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Fix loading project library without IfcProject

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Per IFC4+, IfcContext is the abstract supertype of IfcProject and
IfcProjectLibrary; library-only files legitimately contain only
IfcProjectLibrary as their root context. Bonsai assumed an IfcProject
was always present at three crash sites: the parent-library enum
(reported in #8183), RefreshLibrary's tree view, and AddProjectLibrary.

Introduce tool.Project.get_root_context() that prefers IfcProject and
falls back to IfcProjectLibrary, and route the three sites through it.
get_parent_library() now returns None for a root IfcProjectLibrary;
get_project_hierarchy() and the EditProjectLibrary parent-swap branch
handle that. AddProjectLibrary creates the nested sub-library via
IfcRelNests when the root is an IfcProjectLibrary, matching the
existing convention for library-under-library nesting.

For the separate "Open IFC Project" path, abort with a friendly error
pointing users to Project Setup -> Project Library -> Select Library
File instead of letting set_units() crash deep in the importer.

Closes #8183.

Partly generated with the assistance of an AI coding tool.
This commit is contained in:
Gorgious56
2026-06-18 17:13:03 +02:00
parent 937270fc49
commit 260a387069
5 changed files with 170 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/bonsai/bonsai/bim/module/project/operator.py
+19 -5
View File
@@ -281,9 +281,9 @@ class RefreshLibrary(bpy.types.Operator):
elements = {e for e in elements if not tool.Project.is_element_assigned_to_project_library(e, rels)}
self.props.add_library_project_library("Unassigned", len(elements), 0, False)
ifc_project = library_file.by_type("IfcProject")[0]
root_context = tool.Project.get_root_context(library_file)
hierarchy = tool.Project.get_project_hierarchy(library_file)
tool.Project.load_project_libraries_to_ui(ifc_project, hierarchy)
tool.Project.load_project_libraries_to_ui(root_context, hierarchy)
return {"FINISHED"}
@@ -763,7 +763,10 @@ class EditProjectLibrary(bpy.types.Operator):
previous_parent_library = tool.Project.get_parent_library(project_library)
new_parent_library = library_file.by_id(int(props.parent_library))
if previous_parent_library != new_parent_library:
if previous_parent_library.is_a("IfcProject"):
if previous_parent_library is None:
# Edited library was a root in a library-only file; nest it under the new parent.
ifcopenshell.api.nest.assign_object(library_file, [project_library], new_parent_library)
elif previous_parent_library.is_a("IfcProject"):
# Then new one is IfcProjectLibrary.
ifcopenshell.api.nest.assign_object(library_file, [project_library], new_parent_library)
else: # Previous is IfcProjectLibrary.
@@ -804,9 +807,12 @@ class AddProjectLibrary(bpy.types.Operator):
props = tool.Project.get_project_props()
library_file = IfcStore.library_file
assert library_file
project = library_file.by_type("IfcProject")[0]
root_context = tool.Project.get_root_context(library_file)
project_library = ifcopenshell.api.root.create_entity(library_file, "IfcProjectLibrary")
ifcopenshell.api.project.assign_declaration(library_file, [project_library], project)
if root_context.is_a("IfcProject"):
ifcopenshell.api.project.assign_declaration(library_file, [project_library], root_context)
else:
ifcopenshell.api.nest.assign_object(library_file, [project_library], root_context)
ProjectLibraryData.load() # Update enum.
props.selected_project_library = str(project_library.id())
props.is_editing_project_library = True
@@ -1113,6 +1119,14 @@ class LoadProject(bpy.types.Operator, IFCFileSelector, ImportHelper):
f"Error loading IFC file from filepath '{filepath}'. See logs above in the system console for the details.",
)
return {"CANCELLED"}
if not tool.Ifc.get().by_type("IfcProject"):
self.report(
{"ERROR"},
"This file contains no IfcProject. It is likely an IFC project library — "
"load it via Project Setup → Project Library → Select Library File instead.",
)
IfcStore.purge()
return {"CANCELLED"}
props = tool.Project.get_project_props()
props.is_loading = True
props.total_elements = len(tool.Ifc.get().by_type("IfcElement"))