Basic outline / idea for a Gallery model

gallery.rb

class Gallery
  attr_reader :id, :name, :description, :images, :default_image_id

  def initialize(id, name, description, images={})
    @id = id
    @name = name
    @description = description
    @images = images
  end
  
  def add_image(image) # Takes a GalleryImage
    @images[@images.size + 1] = image
  end

  def remove_image(image_id)
    @images.delete(image_id)
  end

  def set_default_image(image_id)
    @default_image_id = image_id
  end

  def show_images
    @images.each do |image|
      image.display_with_html
    end
  end
end