Returns list of ancestors, starting from parent until root.
subchild1.ancestors # => [child1, root]
[Source]
# File lib/sequel/plugins/tree.rb, line 86 86: def ancestors 87: node, nodes = self, [] 88: nodes << node = node.parent while node.parent 89: nodes 90: end
# File lib/sequel/plugins/tree.rb, line 95 95: def descendants 96: nodes = children.dup 97: nodes.each{|child| nodes.concat(child.descendants)} 98: nodes 99: end
Returns the root node of the tree that this node descends from This node is returned if it is a root node itself.
# File lib/sequel/plugins/tree.rb, line 103 103: def root 104: ancestors.last || self 105: end
Returns true if this is a root node, false otherwise.
# File lib/sequel/plugins/tree.rb, line 108 108: def root? 109: !new? && self[model.parent_column].nil? 110: end
Returns all siblings and a reference to the current node.
subchild1.self_and_siblings # => [subchild1, subchild2]
# File lib/sequel/plugins/tree.rb, line 115 115: def self_and_siblings 116: parent ? parent.children : model.roots 117: end
Returns all siblings of the current node.
subchild1.siblings # => [subchild2]
# File lib/sequel/plugins/tree.rb, line 122 122: def siblings 123: self_and_siblings - [self] 124: end
[Validate]