Ruby on rails 如何将值传递给自定义外键并使外键以第二种形式显示其值

如何将值传递给自定义外键（沃德_id）以及如何制作将插入学生表格的入学编号，出现在第二张表格“家长/监护人详细信息>沃德_id”中，我有以下几点： 学生控制器.rb

class StudentsController < ApplicationController
  def index
    @student = Student.all
  end

  def show
    @student = Student.find(params[:id])
  end

  def new
    @student = Student.new
  end

  def create
    @student = Student.new(params[:student])
    if @student.save
      flash[:success] = ' Student Record Saved Successfully. Please fill the Parent Details.'
      redirect_to new_guardian_url
    else
      flash.now[:error] = 'An error occurred please try again!'
      render 'new'
    end
  end

  def edit
  end
end

class GuardiansController < ApplicationController
  def index
  end

  def show
  end

  def new
    @guardian = Guardian.new
  end

  def edit
  end
end

学生/new.html.erb

<h1>Admission</h1>
<h4>Step 1 - Student details</h4>

<div>
  <div class="span6 offset2">
    <%= form_for(@student) do |f| %>
        <% if @student.errors.any? %>
            <div id="error_explanation">
              <div class="alert alert-error">
                The form contains <%= pluralize(@student.errors.count, 'error') %>
              </div>
              <ul>
                <% @student.errors.full_messages.each do |msg| %>
                    <li>* <%= msg %></li>
                <% end %>
              </ul>
            </div>
        <% end %>


          <table border="0" style="width: 65%" class='hero-unit'>
            <tr>
            <th><div class="field"><%= f.label :admission_no %></div></th>
            <th><div class="field"><%= f.text_field :admission_no %></div></th>
            </tr>

            <tr>
              <th><div class="field"><%= f.label :admission_date %></div></th>
              <th><div class="field"><%= f.text_field :admission_date , :class => 'datepicker'%></div></th>
            </tr></table>
              <h4>Student - Personal Details</h4>
        <table border="0" style="width: 65%" class='hero-unit'>
            <tr>
              <th><div class="field"><%= f.label :first_name %></div></th>
              <th><div class="field"><%= f.text_field :first_name %></div></th>
            </tr>
          <tr>

<h1>Admission</h1>
<h4>Step 2 - Parent details</h4>

<div class="row-fluid">
  <div class="span4 offset1 hero-unit">
    <%= form_for @guardian do |f| %>
        <% if @guardian.errors.any? %>
            <div id="error_explanation">
              <div class="alert alert-error">
                The form contains <%= pluralize(@guardian.errors.count, 'error') %>
              </div>
              <ul>
                <% @guardian.errors.full_messages.each do |msg| %>
                    <li>* <%= msg %></li>
                <% end %>
              </ul>
            </div>
        <% end %>

        <fieldset>
        <div class="field">
          <%= f.label 'Student Admission number' %>
          <%= f.text_field :ward_id , disabled: true %>
        </div>

        <h4>Parent - Personal Details</h4>
        <div class="field">
          <%= f.label :first_name %>
          <%= f.text_field :first_name %>
        </div> 
//not the whole file, just copied what is needed to be seen

入场券
第1步-学生详细信息
表格包含

*

'日期选择器''>
学生-个人资料

监护人/new.html.erb

<h1>Admission</h1>
<h4>Step 1 - Student details</h4>

<div>
  <div class="span6 offset2">
    <%= form_for(@student) do |f| %>
        <% if @student.errors.any? %>
            <div id="error_explanation">
              <div class="alert alert-error">
                The form contains <%= pluralize(@student.errors.count, 'error') %>
              </div>
              <ul>
                <% @student.errors.full_messages.each do |msg| %>
                    <li>* <%= msg %></li>
                <% end %>
              </ul>
            </div>
        <% end %>


          <table border="0" style="width: 65%" class='hero-unit'>
            <tr>
            <th><div class="field"><%= f.label :admission_no %></div></th>
            <th><div class="field"><%= f.text_field :admission_no %></div></th>
            </tr>

            <tr>
              <th><div class="field"><%= f.label :admission_date %></div></th>
              <th><div class="field"><%= f.text_field :admission_date , :class => 'datepicker'%></div></th>
            </tr></table>
              <h4>Student - Personal Details</h4>
        <table border="0" style="width: 65%" class='hero-unit'>
            <tr>
              <th><div class="field"><%= f.label :first_name %></div></th>
              <th><div class="field"><%= f.text_field :first_name %></div></th>
            </tr>
          <tr>

<h1>Admission</h1>
<h4>Step 2 - Parent details</h4>

<div class="row-fluid">
  <div class="span4 offset1 hero-unit">
    <%= form_for @guardian do |f| %>
        <% if @guardian.errors.any? %>
            <div id="error_explanation">
              <div class="alert alert-error">
                The form contains <%= pluralize(@guardian.errors.count, 'error') %>
              </div>
              <ul>
                <% @guardian.errors.full_messages.each do |msg| %>
                    <li>* <%= msg %></li>
                <% end %>
              </ul>
            </div>
        <% end %>

        <fieldset>
        <div class="field">
          <%= f.label 'Student Admission number' %>
          <%= f.text_field :ward_id , disabled: true %>
        </div>

        <h4>Parent - Personal Details</h4>
        <div class="field">
          <%= f.label :first_name %>
          <%= f.text_field :first_name %>
        </div> 
//not the whole file, just copied what is needed to be seen

入场券
步骤2-父级详细信息
表格包含

*

家长-个人资料
//不是整个文件，只是复制了需要查看的内容

<h1>Admission</h1>
<h4>Step 2 - Parent details</h4>

<div class="row-fluid">
  <div class="span4 offset1 hero-unit">
    <%= form_for @guardian do |f| %>
        <% if @guardian.errors.any? %>
            <div id="error_explanation">
              <div class="alert alert-error">
                The form contains <%= pluralize(@guardian.errors.count, 'error') %>
              </div>
              <ul>
                <% @guardian.errors.full_messages.each do |msg| %>
                    <li>* <%= msg %></li>
                <% end %>
              </ul>
            </div>
        <% end %>

        <fieldset>
        <div class="field">
          <%= f.label 'Student Admission number' %>
          <%= f.text_field :ward_id , disabled: true %>
        </div>

        <h4>Parent - Personal Details</h4>
        <div class="field">
          <%= f.label :first_name %>
          <%= f.text_field :first_name %>
        </div> 
//not the whole file, just copied what is needed to be seen