Rails 3中的嵌套表单错误，无法正确保存

Question

I have a scaffold Product and two models productnumbers and serialnumber .

Product.rb

has_one :productnumber 
accepts_nested_attributes_for :productnumber

Productnumber.rb

belongs_to :product 
has_many :serialnumbers 
accepts_nested_attributes_for :serialnumbers

serialnumber.rb

belongs_to :productnumber

The form shows up fine and I can input data and create or update without problems but the serialnumber is not saved at all. When editing the product, the serialnumber field is blank however it had data when the product was created.

Only the product and productnumber are saved but serialnumber isn't saved.

Rails doesn't give an error that the serialnumber isn't saving. Any help how to save the serialnumber that is part of productnumber ?

Answer 1

class CustomersController < ApplicationController
  # GET /customers
  # GET /customers.json
  def index
    @customers = Customer.find(:all, :include=> [:continent, :paymethod])

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @customers }
    end
  end

  # GET /customers/1
  # GET /customers/1.json
  def show
    @customer = Customer.find(params[:id], :include=> [:continent, :paymethod])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @customer }
    end
  end

  # GET /customers/new
  # GET /customers/new.json
  def new
    @customer = Customer.new
    @continents = Continent.find :all
    @paymethods = Paymethod.find :all
    @customer.build_company



    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @customer }
    end
  end


 # GET /customers/1/edit
  def edit
    @customer = Customer.find(params[:id])
    @continents = Continent.find :all
    @paymethods = Paymethod.find :all

  end

  # POST /customers
  # POST /customers.json
  def create
    @customer = Customer.new(params[:customer])
    @continents = Continent.find :all
    @paymethods = Paymethod.find :all


    respond_to do |format|
      if @customer.save
        format.html { redirect_to @customer, notice: 'Customer was successfully created.' }
        format.json { render json: @customer, status: :created, location: @customer }
      else
        format.html { render action: "new" }
        format.json { render json: @customer.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /customers/1
  # PUT /customers/1.json
  def update
    @customer = Customer.find(params[:id])


    respond_to do |format|
      if @customer.update_attributes(params[:customer])
        format.html { redirect_to @customer, notice: 'Customer was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @customer.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /customers/1
  # DELETE /customers/1.json
  def destroy
    @customer = Customer.find(params[:id])
    @customer.destroy

    respond_to do |format|
      format.html { redirect_to customers_url }
      format.json { head :no_content }
    end
  end
end