Returns list of ancestors, starting from parent until root.
subchild1.ancestors # => [child1, root]
[Source]
# File lib/sequel/plugins/tree.rb, line 85 85: def ancestors 86: node, nodes = self, [] 87: nodes << node = node.parent while node.parent 88: nodes 89: end
# File lib/sequel/plugins/tree.rb, line 94 94: def descendants 95: nodes = children.dup 96: nodes.each{|child| nodes.concat(child.descendants)} 97: nodes 98: 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 102 102: def root 103: ancestors.last || self 104: end
Returns true if this is a root node, false otherwise.
# File lib/sequel/plugins/tree.rb, line 107 107: def root? 108: !new? && self[model.parent_column].nil? 109: end
Returns all siblings and a reference to the current node.
subchild1.self_and_siblings # => [subchild1, subchild2]
# File lib/sequel/plugins/tree.rb, line 114 114: def self_and_siblings 115: parent ? parent.children : model.roots 116: end
Returns all siblings of the current node.
subchild1.siblings # => [subchild2]
# File lib/sequel/plugins/tree.rb, line 121 121: def siblings 122: self_and_siblings - [self] 123: end
[Validate]