In SketchUp 2026.1 and earlier, calling the #parent method on a DefinitionList would return the Sketchup::Model object, in SketchUp 2026.2 it appears to now return nil. This is a very esoteric issue, but it causes a huge problem for our extension, because during parsing of the model tree, the parent of objects is queried many times.
The issue can be demonstrated with the generic code snippet below:
module MyModule
def self.traverse_parent(entity, indent='')
puts "#{indent}#{entity.inspect}"
return if !entity.respond_to?(:parent)
self.traverse_parent(entity.parent, indent << ' ')
end
endCreate a simple model with some nested entities within groups, then run MyModule.traverse_parent(Sketchup.active_model.selection[0].entities[0]) with a nested entity selected to traverse the model tree to the root and report each element.
In SketchUp 2026.1 and earlier, the root is reported as a the Sketchup::Model object
In SketchUp 2026.2 the root is reported as nil
This is an unexpected change in the API, contract please fix ASAP!
In SketchUp 2026.1 and earlier, calling the
#parentmethod on aDefinitionListwould return theSketchup::Modelobject, in SketchUp 2026.2 it appears to now returnnil. This is a very esoteric issue, but it causes a huge problem for our extension, because during parsing of the model tree, the parent of objects is queried many times.The issue can be demonstrated with the generic code snippet below:
Create a simple model with some nested entities within groups, then run
MyModule.traverse_parent(Sketchup.active_model.selection[0].entities[0])with a nested entity selected to traverse the model tree to the root and report each element.In SketchUp 2026.1 and earlier, the root is reported as a the
Sketchup::ModelobjectIn SketchUp 2026.2 the root is reported as
nilThis is an unexpected change in the API, contract please fix ASAP!