Module: DataMapper::Is::Tree::InstanceMethods

Public Visibility

Public Instance Method Summary

#ancestors

Returns list of ancestors, starting with the root.

#generation #self_and_siblings

Returns all children of the current node’s parent.

#root

Returns the root node of the current node’s tree.

#siblings

Returns all siblings of the current node.

Public Instance Method Details

ancestors

public ancestors

Returns list of ancestors, starting with the root. 

  grandchild1.ancestors # => [root, child]
[View source] 


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# File 'dm-more/dm-is-tree/lib/dm-is-tree/is/tree.rb', line 93

def ancestors




  node, nodes = self, []
  nodes << node = node.parent while node.parent
  nodes.reverse
end

generation

public generation

Also known as: self_and_siblings

Returns all children of the current node’s parent. 

  grandchild1.generation # => [grandchild1, grandchild2]
[View source] 


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# File 'dm-more/dm-is-tree/lib/dm-is-tree/is/tree.rb', line 118

def generation




  parent ? parent.children : self.class.roots
end

root

public root

Returns the root node of the current node’s tree. 

  grandchild1.root # => root
[View source] 


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# File 'dm-more/dm-is-tree/lib/dm-is-tree/is/tree.rb', line 102

def root




  node = self
  node = node.parent while node.parent
  node
end

siblings

public siblings

Returns all siblings of the current node. 

  grandchild1.siblings # => [grandchild2]
[View source] 


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# File 'dm-more/dm-is-tree/lib/dm-is-tree/is/tree.rb', line 111

def siblings




  generation - [self]
end