使用Rails 4和JQuery添加\删除嵌套表单中的项

我正在使用ruby 1.9.3和rails 4.1。
我对ruby非常陌生，以前没有javascripting知识

我有两个简单的关系，一个有很多通过关系

class Service < ActiveRecord::Base
  has_many :websites,   :dependent => :destroy
  has_many :timetables, :dependent => :destroy
  has_many :service_places, :dependent => :destroy
  has_many :places, through: :service_places
end

class ServicePlace < ActiveRecord::Base
  belongs_to :service
  belongs_to :place
end

class Website < ActiveRecord::Base
  belongs_to :service
end

class Place < ActiveRecord::Base
  has_many :service_places    
  has_many :services, through: :service_places
end

class Timetable < ActiveRecord::Base
  belongs_to :service
end

application.js

function remove_fields(link) {
    $(link).prev("input[type=hidden]").val("1");
    $(link).closest(".fields").hide();
}

function add_fields(link, association, content) {
    var new_id = new Date().getTime();
    var regexp = new RegExp("new_" + association, "g")
    $(link).parent().before(content.replace(regexp, new_id));
}

服务控制器.rb

class ServicesController < ApplicationController
  # Set the service record before each action
  before_action :set_service, only: [:show, :edit, :update, :destroy]

  ################################################################################
  # Create
  ################################################################################
  def create
    @service = Service.new(service_params)

    respond_to do |format|
      if @service.save
        format.html { redirect_to @service, notice: 'Service was successfully created.' }
        format.json { render action: 'show', status: :created, location: @service }
      else
        @service.websites.build
        @service.timetables.build
        @service.service_places.build
        format.html { render action: 'new' }
        format.json { render json: @service.errors, status: :unprocessable_entity }
      end
    end

  end


  ################################################################################
  # Delete
  ################################################################################
  def destroy
    @service.destroy

    respond_to do |format|
      format.html { redirect_to services_url , notice: 'Service was successfully deleted.' }
      format.json { head :no_content }
    end
  end


  ################################################################################
  # Edit
  ################################################################################
  def edit
    @service.websites.build
    @service.timetables.build
    @service.service_places.build
  end


  ################################################################################
  # Index
  ################################################################################
  def index
    @services = Service.order(:service_number).page params[:page]
  end


  ################################################################################
  # New
  ################################################################################
  def new
    @service = Service.new
    @service.websites.build
    @service.timetables.build
    @service.service_places.build
  end


  ################################################################################
  # Search
  ################################################################################
  def search
    @search_term = params[:search_term]
    if @search_term && @search_term.strip.empty?
      redirect_to root_path
    else
      @services = Service.search(@search_term).order(:service_number).page params[:page]
    end
  end


  ################################################################################
  # Show
  ################################################################################
  def show
  end


  ################################################################################
  # Update
  ################################################################################
  def update
    respond_to do |format|
      if @service.update(service_params)
        format.html { redirect_to @service, notice: 'Service was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @service.errors, status: :unprocessable_entity }
      end
    end
  end


  ################################################################################
  # Private methods
  ################################################################################
  private

    # Use callbacks to share common setup or constraints between actions.
    def set_service
      @service = Service.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def service_params
      params.require(:service).permit(:service_number, :operator, :monday, :tuesday, :wednesday, :thursday, :friday, :saturday, :sunday, :bank_holiday, :search_term, websites_attributes: [:id, :service_id, :url, :_destroy], timetables_attributes: [:id, :service_id, :url, :_destroy], service_places_attributes: [:id, :service_id, :position, :place_id, :_destroy],  places_attributes: [:id, :place_name, :active, :_destroy])
    end

end

class-ServicesController

浏览过互联网后，我似乎找不到任何关于如何使用jquery和标准ruby\rails实现这一点的链接。有人知道有哪些链接或资源对实现这一点有用吗

我并不反对使用cocoon或嵌套的表单字段之类的gem，假设我可以将HAML转换为ERB，将coffeescript转换为javascript。作为ruby\rails和javascript的新手，让构建者做一些事情是很好的，但当它出错时，我不知道如何修复它

---

我感谢任何帮助或指导。

由于进展不快，我跟进了一位同事提出的使用cocoon的建议。我遵循了这里的步骤：并设法让它发挥作用。我知道这并不能回答我的实际问题，但它确实为我提供了一种做我想做的事情的方法。我已经为cas中的其他人记下了这些步骤我还把HAML转换成了普通的ruby，因为我更喜欢它

1） 将以下行添加到您的文件中：

gem "cocoon"

2） 将下面的行添加到app/assets/javascripts/application.js文件中

//= require cocoon

3） 修改我的服务表格（_form.html.erb）如下

<%= form_for(@service, :html => {:class => "form-horizontal", :role => "form"}) do |f| %>

  <%= render 'wcc_style/layouts/error_messages', object: @service %>

  <div class="form-group">
    <%= f.label :service_number, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-3">
      <%= f.text_field :service_number, :class => "form-control", :placeholder => "Service Number" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :operator, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-4">
      <%= f.text_field :operator, :class => "form-control", :placeholder => "Operator" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :monday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :monday, :class => "form-control, pull-left", :placeholder => "Monday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :tuesday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :tuesday, :class => "form-control, pull-left", :placeholder => "Tuesday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :wednesday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :wednesday, :class => "form-control, pull-left", :placeholder => "Wednesday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :thursday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :thursday, :class => "form-control, pull-left", :placeholder => "thursday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :friday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :friday, :class => "form-control, pull-left", :placeholder => "Friday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :saturday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :saturday, :class => "form-control, pull-left", :placeholder => "Saturday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :sunday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :sunday, :class => "form-control, pull-left", :placeholder => "Sunday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :bank_holiday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :bank_holiday, :class => "form-control, pull-left", :placeholder => "Bank Holiday" %>
    </div>
  </div>

<h3>Stops</h3>

  <!-- Adds the Service_Places associations via partial (sort applied in model) -->
  <div>
    <%= f.fields_for :service_places do |service_places| %>
      <%= render 'service_place_fields', :f => service_places %>
    <% end %>
    <div class="links">
      <%= link_to_add_association 'add service places', f, :service_places, :class => "btn btn-default" %>
    </div>
  </div>


<h3>Websites</h3>

  <!-- Adds the website associations via a partial -->
  <div>
    <%= f.fields_for :websites do |website| %>
      <%= render "website_fields", :f => website %>
    <%end %>
    <div class="links">
      <%= link_to_add_association 'add websites', f, :websites, :class => "btn btn-default" %>
    </div>
  </div>

<h3>Timetables</h3>

  <!-- Adds the timetables associations via a partial -->
  <div>
    <%=f.fields_for :timetables do |timetable| %>
      <%= render "timetable_fields", :f => timetable %>
    <%end %>
    <div class="links">
      <%= link_to_add_association 'add timetables', f, :timetables, :class => "btn btn-default" %>
    </div>
  </div>

  <br>

  <%= f.submit 'Save', :class => 'btn btn-primary' %>
  <%= link_to 'Cancel', services_path, :class => "btn btn-default", :role =>"button" %>

<% end %>

{:class=>“form horizontal”，:role=>“form”}）do | f |%>
'col-sm-2控件标签'%>
“表单控件”：占位符=>“服务编号”%>
'col-sm-2控件标签'%>
“表单控件”，：占位符=>“运算符”%>
“col-sm-2控制实验室
gem "cocoon"

//= require cocoon

<%= form_for(@service, :html => {:class => "form-horizontal", :role => "form"}) do |f| %>

  <%= render 'wcc_style/layouts/error_messages', object: @service %>

  <div class="form-group">
    <%= f.label :service_number, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-3">
      <%= f.text_field :service_number, :class => "form-control", :placeholder => "Service Number" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :operator, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-4">
      <%= f.text_field :operator, :class => "form-control", :placeholder => "Operator" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :monday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :monday, :class => "form-control, pull-left", :placeholder => "Monday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :tuesday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :tuesday, :class => "form-control, pull-left", :placeholder => "Tuesday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :wednesday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :wednesday, :class => "form-control, pull-left", :placeholder => "Wednesday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :thursday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :thursday, :class => "form-control, pull-left", :placeholder => "thursday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :friday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :friday, :class => "form-control, pull-left", :placeholder => "Friday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :saturday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :saturday, :class => "form-control, pull-left", :placeholder => "Saturday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :sunday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :sunday, :class => "form-control, pull-left", :placeholder => "Sunday" %>
    </div>
  </div>

  <div class="form-group">
    <%= f.label :bank_holiday, :class=>'col-sm-2 control-label' %>
    <div class="col-sm-2">
      <%= f.check_box :bank_holiday, :class => "form-control, pull-left", :placeholder => "Bank Holiday" %>
    </div>
  </div>

<h3>Stops</h3>

  <!-- Adds the Service_Places associations via partial (sort applied in model) -->
  <div>
    <%= f.fields_for :service_places do |service_places| %>
      <%= render 'service_place_fields', :f => service_places %>
    <% end %>
    <div class="links">
      <%= link_to_add_association 'add service places', f, :service_places, :class => "btn btn-default" %>
    </div>
  </div>


<h3>Websites</h3>

  <!-- Adds the website associations via a partial -->
  <div>
    <%= f.fields_for :websites do |website| %>
      <%= render "website_fields", :f => website %>
    <%end %>
    <div class="links">
      <%= link_to_add_association 'add websites', f, :websites, :class => "btn btn-default" %>
    </div>
  </div>

<h3>Timetables</h3>

  <!-- Adds the timetables associations via a partial -->
  <div>
    <%=f.fields_for :timetables do |timetable| %>
      <%= render "timetable_fields", :f => timetable %>
    <%end %>
    <div class="links">
      <%= link_to_add_association 'add timetables', f, :timetables, :class => "btn btn-default" %>
    </div>
  </div>

  <br>

  <%= f.submit 'Save', :class => 'btn btn-primary' %>
  <%= link_to 'Cancel', services_path, :class => "btn btn-default", :role =>"button" %>

<% end %>

<div class="nested-fields">

  <%= f.label :website, :class=>'col-sm-2 control-label' %>

  <div class="col-sm-4">
    <%= f.text_field :url, :class => "form-control", :placeholder => "Service Provider Website" %>
  </div>

  <div>
    <%= link_to_remove_association "remove website", f, :class => "btn btn-default" %>
  </div>

</div>