class Hirb::Helpers::ParentChildTree

Public Class Methods

render(root_node, options={}) click to toggle source

Starting with the given node, this builds a tree by recursively calling a children method. Takes same options as Hirb::Helper::Table.render with some additional ones below.

Options:

:value_method

Method or proc to call to display as a node's value. If not given, uses :name if node responds to :name or defaults to :object_id.

:children_method

Method or proc to call to obtain a node's children. Default is :children.

# File lib/hirb/helpers/parent_child_tree.rb, line 9
def render(root_node, options={})
  value_method = options[:value_method] || (root_node.respond_to?(:name) ? :name : :object_id)
  @value_method = value_method.is_a?(Proc) ? value_method : lambda {|n| n.send(value_method) }
  children_method = options[:children_method] || :children
  @children_method = children_method.is_a?(Proc) ? children_method : lambda {|n| n.send(children_method)}
  @nodes = []
  build_node(root_node, 0)
  super(@nodes, options)
end