无法使用 rails 5 在嵌套表单中保存值

Question

我一直坚持使用 Ruby on Rails 构建嵌套表单。 我正在尝试构建一个包含三个表（User, Contact, Address）的字段的表单。用户表有address_id 和contact_id。用户填写详细信息时，联系人详细信息应保存在contact 表中，地址应保存在address 表中。这两个 ID 都应与用户详细信息一起保存在用户表中。我应该如何进行？

我的模特，

class Address < ApplicationRecord
  has_one :user
end

class Contact < ApplicationRecord
  has_one :user
end

class User < ApplicationRecord
  belongs_to :address
  belongs_to :contact 
end

我的控制器，

class UsersController < ApplicationController
  def new
    @user = User.new
    @user.build_contact
    @user.build_address
  end
  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
  private
  def user_params
    params.require(:user).permit(:name, :email, contact_attributes: [:phone], address_attributes: [:street, :city])
  end
end

我的观点是，

<%= form_for(user) do |f| %>
  <% if user.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(user.errors.count, "error") %> prohibited this user from being saved:</h2>
      <ul>
      <% user.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :name %>
    <%= f.text_field :name %>
 </div>

 <div class="field">
   <%= f.label :email %>
   <%= f.text_field :email %>
 </div>

 <%= f.fields_for :contact do |c| %>
   <div class="field">
     <%= c.label :phone %>
     <%= c.text_field :phone %>
   </div>
 <% end %>

 <%= f.fields_for :address do |a| %>
   <div class="field">
     <%= a.label :street %>
     <%= a.text_field :street %>
   </div>

   <div class="field">
     <%= a.label :city %>
     <%= a.text_field :city %>
   </div>
 <% end %>

 <div class="actions">
   <%= f.submit %>
 </div>
<% end %>

我的方法对吗？请建议。提前致谢。

Answer 1

你漏掉了几行...

class User < ApplicationRecord
  belongs_to :address
  belongs_to :contact
  accepts_nested_attributes_for :address
  accepts_nested_attributes_for :contact 
end

同时确保您接受:id 和:_delete

params.require(:user).permit(:name, :email, contact_attributes: [:id, :phone, :_delete], address_attributes: [:id, :street, :city, :_delete]