module Sequel::Plugins::Tree::SingleRoot::InstanceMethods
Public Instance Methods
Source
# File lib/sequel/plugins/tree.rb 176 def before_save 177 if possible_root? && (root = model.root) && pk != root.pk 178 raise TreeMultipleRootError, "there is already a root #{model.name} defined" 179 end 180 super 181 end
Hook that prevents a second root from being created.
Calls superclass method