tsurupin/portfolio

# == Schema Information
#
# Table name: items
#
#  id          :integer          not null, primary key
#  post_id     :integer          not null
#  sort_rank   :integer          not null
#  target_id   :integer          not null
#  target_type :string(255)      not null
#  created_at  :datetime         not null
#  updated_at  :datetime         not null
#

class Item < ActiveRecord::Base
  belongs_to :post, touch: true
  belongs_to :target, polymorphic: true

  enum target_type: {
    twitter: 'ItemTwitter',
    text: 'ItemText',
    image: 'ItemImage'
  }

  after_destroy :destroy_target

  validates :sort_rank, presence: true
  validates :target_type,
            presence: true,
            inclusion: { in: Item.target_types.keys }

  private

  def destroy_target
    target.destroy
  end
end