Rails 创建按钮不适用于渲染部分

Question

遵循 DRY 规则，我在 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，因此为了简短起见，我将在此处省略。

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，用户和地址表单中包含的部分都会显示，但是当我按下 Create officer 按钮时，什么也没有发生。哪里出错了？

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

您尚未在 officer_params 中设置 user_attributes，请执行此操作：

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

也改变accepts_nested_attributes_for :user, :address 至

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

你还需要 address_attributes 给你的军官参数但是因为我不知道你的数据库字段我不能为你做那部分但是它与 user_attributes 但具有不同的字段（除了 :id 和 :_destroy，它们对所有人都相同）。

编辑：

这是嵌套形式：

<%= 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适用于所有嵌套表单。

你得到的是这个：

<%= 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，您只有 3 个不同的完整表单，并且您无法通过这种方式使用一个提交按钮提交多个表单。

Rails 创建按钮不适用于渲染部分

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