krishicks

class Article < ActiveRecord::Base
  has_many :content_relationships, as: :origin, dependent: :destroy

  has_many :related_articles, through: :content_relationships, source: :related_content, source_type: "Article"
  has_many :related_videos,   through: :content_relationships, source: :related_content, source_type: "Video"
end

class Video < ActiveRecord::Base
  has_many :content_relationships, as: :origin, dependent: :destroy