module Sequel::Plugins::Tree::DatasetMethods

Public Instance Methods

roots() click to toggle source

Returns list of all root nodes (those with no parent nodes).

TreeClass.roots # => [root1, root2]
# File lib/sequel/plugins/tree.rb, line 150
def roots
  roots_dataset.all
end
roots_dataset() click to toggle source

Returns the dataset for retrieval of all root nodes

TreeClass.roots_dataset # => Sequel::Dataset instance
# File lib/sequel/plugins/tree.rb, line 157
def roots_dataset
  ds = where(Sequel.or(Array(model.qualified_parent_column).zip([])))
  ds = ds.order(*model.tree_order) if model.tree_order
  ds
end