class DeliveryDestination < ActiveRecord::Base  
  has_one :cart
  belongs_to :user

  def self.find_or_create(anonymous_id, user_id)
    dd = DeliveryDestination.where(user_id: user_id).order("id desc").first
    dd ||= DeliveryDestination.where(anonymous_id_string: anonymous_id).order("id desc").first
    dd ||= DeliveryDestination.create!({user_id: user_id, anonymous_id_string: anonymous_id })
    return dd
  end
end