Rails 5.0中的嵌套属性在保存记录时出错

Question

我有一个User模型（用于devise），然后我有一个引用User的成员，然后有一个引用member的组合。

我在注册时创建了一个用户。现在，我希望注册用户更新其成员和投资组合表的详细信息。投资组合模型为：-

class Portfolio < ApplicationRecord
  belongs_to :member
  validates_presence_of title:
end

class Member < ApplicationRecord
  belongs_to :user
  has_one :portfolio
  accepts_nested_attributes_for :portfolio
end

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable
  has_one :member

  validates_presence_of :name 
  validates :email, uniqueness: true  
  after_create :create_member_portfolio

  def create_member_portfolio
    puts "Test "
  end  
end 

在我的members_controller中，我的代码是：-

class MembersController < ApplicationController
  before_action :set_member, only: [:show, :edit, :update, :destroy]

  # GET /members
  # GET /members.json
  def index
    @members = Member.all
  end

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

  # GET /members/new
  def new
    @member = setup_member(Member.new) 
  end

  # GET /members/1/edit
  def edit
  end

  # POST /members
  # POST /members.json
  def create
    p = member_params
    byebug
    @member = Member.new(p)
    byebug
    @member.user_id =  current_user.id unless current_user.nil?

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

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

  # DELETE /members/1
  # DELETE /members/1.json
  def destroy
    @member.destroy
    respond_to do |format|
      format.html { redirect_to members_url, notice: 'Member was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

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

  def setup_member(member)
    member.portfolio ||= Portfolio.new
    member
  end

  # Only allow a list of trusted parameters through.
  def member_params
    # slice(*filter.keys).each{|k,v| puts "#{k}:#{v}"}
    #byebug
    params.require(:member).permit(
                                   :dob,
                                   :email,                                   
                                   :phone,                                   
                                   portfolio_attributes: [ :title, :subtitle ]
                                   )
  end
end

并且html.erb如下所示：-

<%= form_for(@member) do |f| %>
  <% if @member.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(member.errors.count, "error") %> prohibited this member from being saved:</h2>
      <ul>
        <% @member.errors.full_messages.each do |message| %>
          <li><%= message %></li>
        <% end %>
      </ul>
    </div>
  <% end %>
  <div class="form-control">
    <%= f.label :dob %>
    <%= f.datetime_select :dob %>
  </div>
  <div class="form-control">
    <%= f.label :email %>
    <%= f.text_field :email %>
  </div>

  <div class="form-control">
    <%= f.label :phone %>
    <%= f.text_field :phone %>
  </div>
  <div class="col-md-12">
    <h2>Profile Details :</h2>
    <div>
      <%= f.fields_for :portfolio do |ff| %>
        <div class="form-control">
          <%= ff.label :title %>
          <%= ff.text_field :title %>
        </div>
        <div class="form-control">
          <%= ff.label :subtitle %>
          <%= ff.text_field :subtitle %>
        </div>
      <% end %>
    </div>
  </div>
  <div class="form-group">
    <%= f.submit 'Save Member Item', class: 'btn btn-primary btn-block' %>
  </div>
<% end %>

但是在创建控制器方法中保存成员对象时，它失败并说Portfolio.member不存在。尽管我在传入的参数中获得了带有标题和副标题的Portfolio_attributes作为键，并且这些参数也经过了验证，但是保存失败。您能否让我知道我在这里做错了什么？

Answer 1

也许您可以通过检查来了解哪个字段导致了错误：

@member = Member.new(p)

@member.valid?

@member.errors

以下是有关它的一些文档：https://guides.rubyonrails.org/v2.3.11/activerecord_validations_callbacks.html#valid-and-invalid