多态关联和嵌套属性：:error=>:blank

Question

我正在尝试保存一个深度嵌套的表单。共有三种不同的模型：应用程序、申请人和地址。地址是多态的，因为应用程序和申请人都可以拥有它们。这些是我要发送的参数：

{"application"=>{
    "loan_type"=>"purchase",
    "loan_amount"=>2500000,
    "borrower_attributes"=>{
        "first_name"=>"Test",
        "middle_name"=>"Test",
        "last_name"=>"Test",
        "birthdate"=>"01/01/1970",
        "phone"=>"1231231234",
        "email"=>"test@me.com",
        "marital_status"=>"married",
        "address_attributes"=>{
            "street_address"=>"xxxx Mission Street",
            "city"=>"San Francisco",
            "state"=>"CA",
            "zip"=>xxxxx
        }
    }
}}

在我的请求中发送此信息时，我会收到以下响应：

<Address id: nil, street_address: "1045 Mission Street", city: "San Francisco", state: "CA", zip: 94103, addressable_type: "Applicant", addressable_id: nil, created_at: nil, updated_at: nil>

还有以下错误信息：

@messages={:"borrower.address.addressable"=>["must exist"]}, @details={"borrower.address.addressable"=>[{:error=>:blank}]}

为什么我不能设置嵌套属性？我需要解决什么问题才能完成这项工作？

这是我的相关文件：

Application.rb

class Application < ApplicationRecord
    before_save :assign_addresses!
    belongs_to :borrower, class_name: 'Applicant'
    belongs_to :coborrower, class_name: 'Applicant', optional: true
    has_one :address, as: :addressable

    accepts_nested_attributes_for :borrower
    accepts_nested_attributes_for :coborrower
    accepts_nested_attributes_for :address
end

申请人.rb

class Applicant < ApplicationRecord
    has_many :applications
    has_one :address, as: :addressable
    validates_presence_of :first_name, :last_name, :phone, :email, :birthdate

    accepts_nested_attributes_for :address
end

地址.rb

class Address < ApplicationRecord
    belongs_to :addressable, polymorphic: true
    validates_presence_of :street_address, :city, :state, :zip
end

Applications_Controller.rb

class Api::ApplicationsController < ApplicationController

    ...

    def create
        @application = Application.new(application_params)

        if @application.save
            render json: @application, status: :created
        else
            render json: @application.errors, status: :unprocessable_entity
        end
    end

    private

    def application_params
        params.require(:application).permit(:loan_type, :loan_amount, borrower_attributes: [:first_name, :middle_name, :last_name, :birthdate, :phone, :email, :ssn, :marital_status, address_attributes: [:street_address, :city, :state, :zip]])
    end
end

Answer 1

发现问题。将optional: true 添加到Address belongs_to 后一切正常。这是一个新的 Rails 5 约定。我记得把它放在我的共同借款人身上，但不是在那里。希望这对某人有帮助！

Answer 2

像这样构建：

{"application"=>{
"loan_type"=>"purchase",
"loan_amount"=>2500000,
"applications_borrower_attributes"=>{"0"=>{
    "first_name"=>"Test",
    "middle_name"=>"Test",
    "last_name"=>"Test",
    "birthdate"=>"01/01/1970",
    "phone"=>"1231231234",
    "email"=>"test@me.com",
    "marital_status"=>"married"},
    "borrowers_address_attributes"=>{"0"=>{
        "street_address"=>"xxxx Mission Street",
        "city"=>"San Francisco",
        "state"=>"CA",
        "zip"=>xxxxx
     }
    }
  }
}}