Question

例如我有这些模型：

class Person < ActiveRecord::Base
  # attributes: id, name
  has_one :address, as: :addressable
  accepts_nested_attributes_for :address
end

class Company < ActiveRecord::Base
  # attributes: id, name, main_address_id
  has_one :address, as: :addressable
  belongs_to :main_address, class_name: 'Address', foreign_key: :main_address_id

  accepts_nested_attributes_for :main_address

  def main_address_attributes=(attributes)
    puts '='*100
    puts attributes.inspect
    self.build_main_address(attributes)
    self.main_address.addressable_id = self.id
    self.main_address.addressable_type = self.class.to_s
    puts self.inspect
    puts self.main_address.inspect
  end
end

class Address < ActiveRecord::Base
  # attributes: id, address1, address2, city_id,..
  belongs_to :addressable, polymorphic: true
  validates :addressable_id, :addressable_type, presence: true
end

我正在尝试使用嵌套属性保存Company，您可以将其视为参数：

{"name"=>"Test Company", "email"=>"", "display_name"=>"Company pvt ltd", "description"=>"Company desc", "founded_in"=>"2014-08-05", "website"=>"", "main_address_attributes"=>{"address1"=>"My address1", "address2"=>"My address2", "city_id"=>"10"}}

当 main_address 不可寻址（addressable_id和addressable_type）时，这不起作用，因为它拒绝并且不会保存数据现在，即使我试图在main_address_attributes=(attributes)类的Company方法中添加它。

每当我尝试使用上述参数保存时，我会收到此错误：

Main address addressable can't be blank

如何解决此问题？

Answer 1

如果使用belongs_to，您会有类似company与address（通过main_address_id）相关的内容，而这些内容与另一个相关（Company或Person）通过多态addressable。

例如你可以改变：

has_one :address, as: :addressable

为：

has_many :address, as: :addressable

然后添加到您的Address：

enum address_type: [:primary, :secondary]

如何使用嵌套属性保存多态模型的belongs_to关联？

1 个答案: