app/models/category.rb

	category.rb revision 8d0fb4fb93788e195e8fc2a48b243b3e53e6bd45
class Category < ActiveRecord::Base

  has_and_belongs_to_many :ontologies

  attr_accessible :name, :parent, :parent_id

  validates :name, :uniqueness => { :message => 'Already taken' }

  has_ancestry

  def self.arrange_as_array(options={}, hash=nil)

    hash ||= arrange(options)

    arr = []
    hash.each do |node, children|
      arr << node
      arr += arrange_as_array(options, children) unless children.nil?
    end
    arr
  end

  def name_for_selects
    "#{'-' * depth} #{name}"
  end

  def possible_parents
    parents = Category.arrange_as_array(:order => 'name')
    return new_record? ? parents : parents - subtree
  end

  def to_s
    name
  end

end