Rails 5中具有多态关联的嵌套属性

Question

我创建了一个Address具有多态关联模型,我想救它,虽然客户端模型嵌套的属性,但我得到Address addressable must exist的@client.errors.

楷模:

class Client < ApplicationRecord
  has_one :address, as: :addressable, dependent: :destroy
  accepts_nested_attributes_for :address, :allow_destroy => true
end

class Address < ApplicationRecord
  belongs_to :addressable, polymorphic: true
end

控制器:

class ClientsController < ApplicationController

  def new
    @client = Client.new
    @client.create_address
  end

  def create
    @client = Client.new(client_params)

    if @client.save
      ...
    else
      ...
    end
  end

  private
  def client_params
    params.require(:client).permit(:first_name ,:last_name, :company, address_attributes: [:line1, :line2, :line3, :city, :state_province, :postal_code, :country])
  end    
end

Answer 1

您应该inverse_of在您的belongs_to关系上添加密钥，例如在您的Address班级上：

class Address < ApplicationRecord
  belongs_to :addressable, polymorphic: true, inverse_of: :addressable
end

这将正确保存嵌套地址，因为 Rails 现在将正确知道要在addressable.

optional除非确实是可选的，否则不要使用该密钥addressable。

Answer 2

 belongs_to :xx, polymorphic: true, optional: true

Answer 3

还

optional: true 

为了解决这个问题，您可以通过分两步中断控制器中的创建来保持强制关系。

def client_params
  params.require(:client).permit(:first_name ,:last_name, :company)
end

def address_params 
 params.require(:client).require( :address_attributes).permit(:line1, :line2, :line3, :city, :state_province, :postal_code, :country )
end

def create
  @client = Client.new(client_params)

  if @client.save
   @client.create_address( address_params )
  ...

这可能看起来更难看，但它可以让关系更安全。