Question

遵循DRY规则，我已在我的officers\_form.html.erb视图中插入了渲染部分命令：

<%= form_for(officer) do |f| %>
  <% if officer.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(officer.errors.count, "error") %> prohibited this officer from being saved:</h2>

      <ul>
        <% officer.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <%= render :partial => 'users/form', :locals => {:user => @officer.user} %>
  <%= render :partial => 'addresses/form', :locals => {:address => @officer.address} %>

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

这是我的users\_form.html.erb文件：

<%= 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 %>

  <%= f.fields_for :user do |user_fields| %>
    <div class="field">
      <%= user_fields.label :last_name %>
      <%= user_fields.text_field :last_name %>
    </div>

    <div class="field">
      <%= user_fields.label :first_name %>
      <%= user_fields.text_field :first_name %>
    </div>

    <div class="field">
      <%= user_fields.label :middle_name %>
      <%= user_fields.text_field :middle_name %>
    </div>

    <div class="field">
      <%= user_fields.label :gender %>
      <%= user_fields.select(:gender, User.genders.keys) %>
    </div>
  <% end %>

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

与用户代码相同的推理适用于地址代码，因此我将在此省略。

这是我的officers_controller文件：

class OfficersController < BaseController
  before_action :set_officer, only: [:show, :edit, :update, :destroy]

  # GET /officers
  # GET /officers.json
  def index
    @officers = Officer.all
  end

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

  # GET /officers/new
  def new
    @officer = Officer.new
  end

  # GET /officers/1/edit
  def edit
  end

  # POST /officers
  # POST /officers.json
  def create
    @officer = Officer.new(officer_params)

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

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

  # DELETE /officers/1
  # DELETE /officers/1.json
  def destroy
    @officer.destroy
    respond_to do |format|
      format.html { redirect_to officers_url, notice: 'Officer was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

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

    # Never trust parameters from the scary internet, only allow the white list through.
    def officer_params
      #params.fetch(:officer, {})
      params.require(:officer).permit!
    end
end

现在，如果我转到http://localhost:3000/officers/new，会显示用户和地址表单中包含的部分，但是当我按下Create officer按钮时，没有任何反应。错误在哪里？

class Officer < ApplicationRecord
  belongs_to :manager#, inverse_of: :officer
  has_many :customers#, inverse_of: :officer

  has_one :user, as: :userable, dependent: :destroy
  has_one :address, as: :addressable, dependent: :destroy

  accepts_nested_attributes_for :user, :address
end

class Manager < ApplicationRecord
  has_many :officers#, inverse_of: :manager

  has_one :user, as: :userable, dependent: :destroy
  has_one :address, as: :addressable, dependent: :destroy

  accepts_nested_attributes_for :user, :address
end

class User < ApplicationRecord
  enum gender: { female: 0, male: 1, undefined: 2 }

  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  belongs_to :userable, polymorphic: true
end

谢谢， FZ

Answer 1

您还没有在officer_params中设置user_attributes，请执行以下操作：

def officer_params
  #params.fetch(:officer, {})
  params.require(:officer).permit(:id, user_attributes: [:id, :last_name, :middle_name, :first_name, :gender, :_destroy])
end

并改变accepts_nested_attributes_for :user, :address 到

 'accepts_nested_attributes_for :user, reject_if: :all_blank, allow_destroy: true
  accepts_nested_attributes_for :address, reject_if: :all_blank, allow_destroy: true'

你需要将address_attributes发送给你的官员参数，但由于我不知道你的数据库字段，我不能为你做那部分，但它与user_attributes几乎相同，但有不同的字段（除了：id和：_destroy对所有人都是一样的。）

编辑：

这是一种嵌套形式：

<%= form_for(officer) do |f %>

 <%= f.fields_for :user do |user| %> 
  <%= user.text_field :last_name %>
  <%= user.text_field :middle_name %>
  <%= user.text_field :first_name %>
 <% end %>

 <%= f.fields_for :address do |address| %>
  <%= address.text_field :street_name %>
  <%= address.text_field :zip_code %>
 <% end %>

<%= f.submit 'submit' %>

这样一个提交按钮也可以为所有嵌套表单提供。

你拥有的是：

<%= form_for(officer) do |f %>
 <%= form_for(user) do |f|
  <%= f.fields_for :user do |user| %> // this (f) now stands for the user form instead of the officer form 
   <%= user.text_field :last_name %>
   <%= user.text_field :middle_name %>
   <%= user.text_field :first_name %>
  <% end %>
 <% end %>

<%= form_for(address) do |f| %>
 <%= f.fields_for :address do |address| %> // same for this one
  <%= address.text_field :street_name %>
  <%= address.text_field :zip_code %>
 <% end %>
<% end %>

<%= f.submit 'submit' %>

现在您没有嵌套表单，只有3种不同的完整表单，并且您无法通过这种方式提交多个表单和一个提交按钮。

Rails创建按钮不适用于渲染部分

1 个答案: