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# File 'lib/comfypress/extensions/acts_as_tree.rb', line 8
def cms_acts_as_tree(options = {})
configuration = {
:foreign_key => 'parent_id',
:order => nil,
:counter_cache => nil,
:dependent => :destroy,
:touch => false }
configuration.update(options) if options.is_a?(Hash)
belongs_to :parent,
:class_name => name,
:foreign_key => configuration[:foreign_key],
:counter_cache => configuration[:counter_cache],
:touch => configuration[:touch]
has_many :children,
:class_name => name,
:foreign_key => configuration[:foreign_key],
:order => configuration[:order],
:dependent => configuration[:dependent]
class_eval " include ComfyPress::ActsAsTree::InstanceMethods\n \n scope :roots,\n :conditions => \"\#{configuration[:foreign_key]} IS NULL\",\n :order => \#{configuration[:order].nil? ? \"nil\" : %Q{\"\#{configuration[:order]}\"}}\n \n def self.root\n roots.first\n end\n \n validates_each \"\#{configuration[:foreign_key]}\" do |record, attr, value|\n if value\n if record.id == value\n record.errors.add attr, \"cannot be it's own id\"\n elsif record.descendants.map {|c| c.id}.include?(value)\n record.errors.add attr, \"cannot be a descendant's id\"\n end\n end\n end\n EOV\n \nend\n"
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