如何在多态关联中将验证范围限定于特定模型？

Question

我有两个模型User and Investment和一个多模型模型Address

class User < ActiveRecord::Base
    has_one :address, as: :addressable, dependent: :destroy
    accepts_nested_attributes_for :address
end

class Investment < ActiveRecord::Base
    has_many :addresses, as: :addressable, dependent: :destroy
    accepts_nested_attributes_for :addresses, reject_if: lambda { |v| v['address'].blank? } && :address_blank, :allow_destroy => true
end


class Address < ActiveRecord::Base
   belongs_to :addressable, polymorphic: true
   validates :address, presence: true
end

现在validates :address, presence: true将适用于Investment和User但我希望仅适用于Investment而不适用于User 。 所以我该怎么做。

谢谢。

Answer 1

课堂上投资添加

validates :address_id, presence: true

并从地址类中删除波纹管

validates :address, presence: true

Answer 2

class Address < ActiveRecord::Base
   belongs_to :addressable, polymorphic: true
   validates :address, presence: true, if: :investment?

   protected

   def investment?
     addressable_type == 'Investment'
   end
end