Rails嵌套窗体没有插入到数据库中

Question

好吧，所以我有两个表的轨道嵌套窗体。它将所有内容插入到一个表格中，但不在另一个表格中。我查了一下所有的例子，我可以得到我的手，无论我做什么似乎都不起作用。

这里是我的模型：

用户：

class User < ActiveRecord::Base 
    has_many :addresses, dependent: :destroy 
    accepts_nested_attributes_for :addresses 
end 

地址：

class Address < ActiveRecord::Base 
    belongs_to :user 
end 

这是我的形式：

= form_for @user do |f| 
    - if @user.errors.any? 
    #error_explanation 
     %h2= "#{pluralize(@user.errors.count, "error")} prohibited this user from being saved:" 
     %ul 
     - @user.errors.full_messages.each do |msg| 
      %li= msg 
    %ul 
    .field 
    = f.label :first_name 
    = f.text_field :first_name 
    .field 
    = f.label :last_name 
    = f.text_field :last_name 
    .field 
    = f.label :password 
    = f.text_field :password 
    .field 
    = f.label :email 
    = f.text_field :email 
    = f.fields_for :address do |address| 
    .field 
     = address.label :country 
     = address.text_field :country 
    .field 
     = address.label :state 
     = address.text_field :state 
    .field 
     = address.label :city 
     = address.text_field :city 
    .field 
     = address.label :zip_code 
     = address.text_field :zip_code 
    .actions 
    = f.submit 'Save' 

最后还有控制器，这是我相信是我的来源问题，我已经查阅了无数的例子，如何做到这一点，似乎每个人都做不同的事情。反正这里是：

class UsersController < ApplicationController 
    before_action :set_user, only: [:show, :edit, :update, :destroy] 

    # GET /users 
    # GET /users.json 
    def index 
    @users = User.all 
    end 

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

    # GET /users/new 
    def new 
    @user = User.new 
    @addresses = @user.addresses.build 
    end 

    # GET /users/1/edit 
    def edit 
    end 

    # POST /users 
    # POST /users.json 
    def create 
    @user = User.new(user_params) 
    respond_to do |format| 
     if @user.save 
     format.html { redirect_to @user, notice: 'User was successfully created.' } 
     format.json { render :show, status: :created, location: @user } 
     else 
     format.html { render :new } 
     format.json { render json: @user.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

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

    # DELETE /users/1 
    # DELETE /users/1.json 
    def destroy 
    @user.destroy 
    respond_to do |format| 
     format.html { redirect_to users_url, notice: 'User was successfully destroyed.' } 
     format.json { head :no_content } 
    end 
    end 

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

    # Never trust parameters from the scary internet, only allow the white list through. 
    def user_params 
     params.require(:user).permit(:first_name, :last_name, :password, :email, 
     address_attributes: [:country, :state, :city]) 
    end 
end 

Answer 1

= fields_for :address do |address| 

将

= f.fields_for :addresses do |address| 

，并在你的控制器，这将是addresses_attributes

def user_params 
     params.require(:user).permit(:first_name, :last_name, :password, :email, 
     addresses_attributes: [:country, :state, :city]) 
    end 

可以使用cocoon宝石嵌套属性。这很好，很容易实现。

Answer 2

能否请你重写表单中的以下代码行，因为has_many关系，address将改变addresses在plural形式。

= fields_for :address do |address| 

替换为

= f.fields_for :addresses do |address| 

而且user_params应该是改了一下，像addresses_attributes代替address_attributes

def user_params 
    params.require(:user).permit(:first_name, :last_name, :password, :email, 
    addresses_attributes: [:country, :state, :city]) 
end