Rails atributos anidados: requieren al menos dos registros
¿Cómo puedo lograr que se requieran al menos dos registros de opciones para enviar un producto?
class Product < ActiveRecord::Base
belongs_to :user
has_many :options, :dependent => :destroy
accepts_nested_attributes_for :options, :allow_destroy => :true, :reject_if => proc { |attrs| attrs.all? { |k, v| v.blank? } }
validates_presence_of :user_id, :created_at
validates :description, :presence => true, :length => {:minimum => 0, :maximum => 500}
end
class Option < ActiveRecord::Base
belongs_to :product
validates :name, :length => {:minimum => 0, :maximum => 60}
end