Rails 5 error accepted_nested_attributes_for in polymorphic

Question

我嘗試創建產品時發生錯誤：「無法建立關聯'type_data'。您是否嘗試建立多態一對一關聯？」

我不知道發生了什麼。我看到很多使用相同代碼的例子，但我的工作不正常。

這裏我product.rb

class Product < ApplicationRecord 
    belongs_to :type_data, polymorphic: true 
    accepts_nested_attributes_for :type_data, allow_destroy: true 
end 

這裏我hotel_room.rb

class HotelRoom < ApplicationRecord 
    has_one :product, as: :type_data, dependent: :destroy 
    has_many :rates 
    accepts_nested_attributes_for :rates, allow_destroy: true 
end 

我的產品/ _form.html.erb

<%= f.fields_for :type_data do |builder| %> 
    <%= render "edit_hotel_account_fields", f: builder %> 
<% end %> 

我的產品/ _edit_account_fields.heml.erb

<%= f.fields_for :rates do |builder| %> 
    <%= render 'rate_fields', f: builder %> 
<% end %> 
<%= link_to_add_fields "Add rate", f, :rates %> 

個

我的產品/ _rate_fields.html.erb

<div class="form-group"> 
    <label><%= t('products.new.rates.double_price') %></label> 
    <%= f.number_field :double_price, step: 0.1, class: 'form-control' %> 
</div> 
<%= f.hidden_field :_destroy %> 
<%= link_to "remove", '#', class: "remove_fields" %> 

這是我所有products_controller.rb

class ProductsController < ApplicationController 
    before_action :set_product, only: [:show, :edit, :update, :destroy] 

    # GET /products 
    # GET /products.json 
    def index 
    @products = Product.all 
    end 

    # GET /products/1 
    # GET /products/1.json 
    def show 
    end 

    # GET /products/new 
    def new 
    @product = Product.new 
    end 

    # GET /products/1/edit 
    def edit 
    end 

    # POST /products 
    # POST /products.json 
    def create 
    @product = Product.new(product_params) 

    respond_to do |format| 
     if @product.save 
     format.html { redirect_to products_path, notice: 'Product was successfully created.' } 
     format.json { render :show, status: :created, location: @product } 
     else 
     format.html { render :new } 
     format.json { render json: @product.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # PATCH/PUT /products/1 
    # PATCH/PUT /products/1.json 
    def update 
    respond_to do |format| 
     if @product.update(product_params) 
     format.html { redirect_to @product, notice: 'Product was successfully updated.' } 
     format.json { render :show, status: :ok, location: @product } 
     else 
     format.html { render :edit } 
     format.json { render json: @product.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /products/1 
    # DELETE /products/1.json 
    def destroy 
    @product.destroy 
    respond_to do |format| 
     format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' } 
     format.json { head :no_content } 
    end 
    end 

    # AJAX cargas más fechas 
    def date_range 
    end 

    private 
    # Use callbacks to share common setup or constraints between actions. 
    def set_product 
     @product = Product.find(params[:id]) 
    end 

    # Never trust parameters from the scary internet, only allow the white list through. 
    def product_params 
     params.require(:product).permit(:status, :provider_id, :commission, :title, :commercial_title, :title_seo, :description, :seo_description, :slug_web, :slug_redirection, :services, :info, :province, :state, :city, :country, :cancel_conditions, :limit_children_age, :special_alert, :notes, :stock, :iva, :minimum_advance, type_data_attributes: [:room_stock, :room_service, :_destroy, rates_attributes: [:title, :start_date, :end_date, :hotel_room_id, :individual_price, :double_price, :child_bed_price, :adult_bed_price, :adult_breakfast_price, :adult_medium_price, :adult_complete_price, :child_breakfast_price, :child_medium_price, :child_complete_price, :_destroy]], dates: {}, map: {}, address_autocomplete: {}) 
    end 
end 

做任何人知道什麼是happend？

謝謝！

Answer 1

由於酒店模型通過多態的一個產品，

class HotelRoom < ApplicationRecord 
    has_one :product, as: :type_data, dependent: :destroy 
    accepts_nested_attributes_for :product, allow_destroy: true 
    accepts_nested_attributes_for :rates, allow_destroy: true 
.... 
end 

在hotel_rooms控制器新動作

def new 
    @hotel_room = HotelRoom.new 
    @hotel_room.build_product 
end 

在酒店視圖形式

<%= form_for(@hotel_room) do |f| %> 
    .... 
    <%= f.fields_for(:product) do |p| %> 
    .... 
    <% end %> 
<% end %> 

注： 如果你有共同的HotelRoom和Product之間的數據，那麼你需要引入另一個模型l ike TypeData並將其設置爲多態。