class ContentLink < ActiveRecord::Base
  belongs_to :content_node, :class_name => "ContentNode", :foreign_key => "target_id"
  acts_as_nested_set(:parent_column => "ancestor_id")

  def full_xml(builder=nil)
    # add something here to get the content, not the assignment
    to_xml(:builder => builder, :skip_instruct => true) do |xml|
      children.each { |child| child.full_xml(xml) }
    end
  end
  
  def self.find_parent_content_by_content_id(content_id)
    @parent_content = find(:all, :conditions => {:content_id => content_id}).parent.content
    return @parent_content
  end
  
  #before filter on controller:
  def title
     #name += "Link between #{source} and #{target}"
  end
end