i18n + associations?

image.rb

class Image < ActiveRecord::Base
  belongs_to :snippet
end

snippet.rb

class Snippet < ActiveRecord::Base
  has_many :images, -> { where(id: image_ids) }
  
  translates :image_ids
  serialize :image_ids, Array
  
  before_save :update_image_ids
  
  def update_image_ids
    image_ids = images.select(:id).map(&:id)
  end
  
  def remove_images_for_locale(image_ids_to_remove)
    image_ids = image_ids - Array.new(image_ids_to_remove)
    return image_ids if save
    false
  end
  
  def add_images_for_locale(image_ids_to_add)
    image_ids = (image_ids + Array.new(image_ids_to_add)).uniq
    return image_ids if save
    false
  end
end

# I18n.locale = 'en-US'
# @snippet = Snippet.new
# @snippet.images << Image.where(id: [1,2,3])
# @snippet.add_images_for_locale([1,2,3])
# @snippet.images => Images 1,2,3
# I18n.locale = 'en-UK'
# @snippet.remove_images_for_locale([1,2])
# @snippet.images => Image 3
# I18n.locale = 'en-US'
# @snippet.images => Images 1,2,3