image.rb

class Image
  include Mongoid::Document
  include Mongoid::Paperclip
  include Mongoid::Slug
  include ComparableByIndex
  include CanBePublished

  embedded_in :portfolio_item, inverse_of: :images
  field :title, type: String
  slug :title, history: true
  field :description, type: String
  field :technique
  field :date, type: Date
  has_mongoid_attached_file :image,
                            path: ':img_path.:extension',
                            url: ':img_url.:extension',
                            styles: {large: '780>', medium: '320>', small: '160x160#', mini: '80x80#'},
                            use_timestamp: false
  validates_attachment :image, content_type: { content_type: %w(image/jpg image/jpeg image/png image/gif)}

  attr_accessor :delete_image
  before_validation { image.clear if delete_image == '1' }
  validates_presence_of :title
end