Ruby on rails 保存父对象id时保存子对象id-嵌套视图-集合\u选择（rails）

我有两个模型：教堂地址和教堂成员。我将教会成员保存在他们自己的模型中。我想通过churchaddress形式的嵌套字段\u选择多个churchaddress成员，并在保存churchaddress时将churchaddress\u id保存在churchmember模型上。最后，我想向教会成员展示教会地址，其中churchmembers.churchaddress\u id=churchaddress\u id

此时，我在嵌套视图上选择了集合，但无法将所选丘吉尔成员的孩子保存在丘吉尔地址父对象上。我希望有人能帮助我

# churchaddress.rb model
class Churchaddress < ActiveRecord::Base
    has_many :churchmembers, dependent: :destroy, autosave: true
    accepts_nested_attributes_for :churchmembers,
                                    reject_if: proc { |attributes| attributes['name'].blank? },
                                    allow_destroy: true
    validates_associated :churchmembers
    validates :name,
                presence: true
    def to_s
        name
    end
end

# churchmember.rb model
class Churchmember < ActiveRecord::Base
  belongs_to :churchaddress
  accepts_nested_attributes_for :churchaddress
  validates :name,
                presence: true
  def to_s
    name
  end
end

# churchaddresses controller
class ChurchaddressesController < ApplicationController
  before_action :set_churchaddress, only: [:show, :edit, :update, :destroy]

  def show
  end

  # GET /churchaddresses/new
  def new
    @churchaddress = Churchaddress.new
    @churchaddress.churchmembers.build
  end

  # POST /churchaddresses
  # POST /churchaddresses.json
  def create
    @churchaddress = Churchaddress.new(churchaddress_params)

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

  private
    def set_churchaddress
      @churchaddress = Churchaddress.find(params[:id])
    end

    def churchaddress_params
      params.require(:churchaddress).permit(:name, churchmembers_attributes: [:id, :name, :_destroy, :churchmember_ids => [] ])
    end
end

# form_for with nested fields_for churchaddresses

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

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

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

  <h2>Church members</h2>
  <%= f.fields_for :churchmembers, @churchaddress.churchmembers do |churchmember| %>
  <div class="churchmember_fields">
  <div class="field">

    <%= churchmember.collection_select(:churchmember_ids, Churchmember.all, :id, :name, {include_blank: false, :include_hidden => false, :selected => @churchaddress.churchmembers.map(&:id)}, {:multiple => true}) %>

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

---

提前感谢您的回复

我终于设法解决了这个问题。花了我几个晚上，但结果太棒了！ 对于有相同问题的人，我在下面发布了更改后的表格

class Churchaddress < ActiveRecord::Base
    has_many :churchmembers, foreign_key: :churchaddress_id
    accepts_nested_attributes_for :churchmembers

    def to_s
        name
    end
end

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

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

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

  <h2>Church members</h2>
  <div class="churchmember_fields">
  <div class="field">    
    <%= collection_select(:churchaddress, :churchmember_ids, Churchmember.all, :id, :name, {:selected => @churchaddress.churchmember_ids, :include_hidden => false}, {multiple: true}) %>
  </div>
  </div>
  <br>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

---

Church Member_ID是什么类型的字段？@vee感谢您的回复。我用schema.rb更新了我的问题。关于成员ID：我没有在数据库中指定此字段。我不知道我必须在哪里添加此字段？你能帮我吗？

class Churchaddress < ActiveRecord::Base
    has_many :churchmembers, foreign_key: :churchaddress_id
    accepts_nested_attributes_for :churchmembers

    def to_s
        name
    end
end

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

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

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

  <h2>Church members</h2>
  <div class="churchmember_fields">
  <div class="field">    
    <%= collection_select(:churchaddress, :churchmember_ids, Churchmember.all, :id, :name, {:selected => @churchaddress.churchmember_ids, :include_hidden => false}, {multiple: true}) %>
  </div>
  </div>
  <br>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>