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我正在创建一个表格，用于在第一步中提交学生详细信息，在第二步中应提交家长（监护人）详细信息。我为学生创建了一个控制器，为监护人创建了另一个控制器，填写详细信息后，我需要在第一步按下提交按钮时，应该出现第二步，即家长/监护人详细信息，但我在实现这一点时遇到了问题。我的文件是：students_controller.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.'
      render 'guardians/new'
    else
      flash.now[:error] = 'An error occurred please try again!'
      render 'new'
    end
  end

  def edit
  end
end

学生.rb

class Student < ActiveRecord::Base
  attr_accessible :address_line1, :address_line2, :admission_date, :admission_no, :birth_place, :blood_group, :city,
                  :class_roll_no, :date_of_birth, :email, :first_name, :gender, :language, :last_name, :middle_name,
                  :phone1, :phone2, :post_code, :religion, :country_id, :nationality_id
  belongs_to :user
  belongs_to :country
  belongs_to :school
  belongs_to :batch
  belongs_to :nationality , class_name: 'Country'
  has_many :guardians , foreign_key:  'ward_id'
  has_many :student_previous_subject_marks
  has_one :student_previous_data
end

监护人控制器.rb

class GuardiansController < ApplicationController
  def index
  end

  def show
  end

  def new
    @guardian = Guardian.new
  end

  def edit
  end
end

监护人.rb

class Guardian < ActiveRecord::Base
  attr_accessible :city, :dob, :education, :email, :first_name, :income, :last_name, :mobile_phone, :occupation,
                  :office_address_line1, :office_address_line2, :office_phone1, :office_phone2, :relation
  belongs_to :user
  belongs_to :country
  belongs_to :school
  belongs_to :ward , class_name:  'Student'
end

路线.rb

Triton::Application.routes.draw do

  get "guardians/index"

  get "guardians/show"

  get "guardians/edit"

  get "students/index"

  get "students/show"

  get "students/edit"

  resources :articles do
    resources :comments
  end
  resources :users
  resources :guardians
  resources :students
  resources :sessions
  get '/user/dashboard', to: 'static_pages#home'
  get '/student/admission1' , to: 'students#new'
  get '/student/admission2' , to: 'guardians#new'


  root to: 'sessions#new'
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>

监护人/new.html.erb

<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

我面临的错误

 NoMethodError in Students#create

undefined method `model_name' for NilClass:Class

Extracted source (around line #45):

42: 
43: <div class="row-fluid">
44:   <div class="span4 offset1 hero-unit">
45:     <%= form_for @guardian do |f| %>
46:         <% if @guardian.errors.any? %>
47:             <div id="error_explanation">
48:               <div class="alert alert-error">

我希望你能明白我的意思来解决我的问题，谢谢！

4

2 回答 2

1

这可能是几件事：

从以下位置更改行：

<%= form_for @guardian do |f| %>

到：

<%= form_for :guardian => {:action => :create} do |f| %>

如果这不起作用。删除该行{:action => :create}

其他可能是问题的事情。

  1. 你有两个控制器，但没有说哪个是相关的。

  2. 您的两个控制器都没有设置您视图中引用的复数 @guardian

于 2013-06-25T10:10:46.497 回答
0

你应该

redirect_to new_guardian_url

代替

render 'guardians/new'

在你的 students_controller.rb 里面

于 2013-06-25T10:10:28.107 回答