+ create(:old_node, :node_id => node.id, :version => n, :latitude => node.latitude, :longitude => node.longitude, :changeset => node.changeset)
+ end
+
+ # For deleted nodes, make sure the most recent old_node is also deleted.
+ if node.visible == false
+ latest = node.old_nodes.find_by(:version => node.version)
+ latest.visible = false
+ latest.save