主页中的 NoMethodError #index

Question

请帮助我。我不确定我的路线或复数是否有问题，但出现此错误并且不再知道该怎么办，已经在很多地方进行了研究，但一无所获。

我开始了一个迷你教程来设计并且它有效，登录有效。所以我想重用它并建立一个待办事项列表。

当我将部分渲染放到我希望他们保留字段以创建待办事项列表的位置时，会发生：

ActionView::Template::Error (undefined method `model_name' for NilClass:Class):
1: <%= form_for(@todo_list) do |f| %>
2:     <% if @todo_list.errors.any? %>
3:         <div id="error_explanation">
4:           <h2><%= pluralize(@todo_list.errors.count, "error") %> prohibited this todo_list from being saved:</h2>

路线：

 match 'dashboard' => 'home#dashboard'
 match 'register' =>'registration#register'
 root :to => 'home#index'

---

    new_member_session GET    /members/sign_in(.:format)       devise/sessions#new
            member_session POST   /members/sign_in(.:format)       devise/sessions#create
    destroy_member_session DELETE /members/sign_out(.:format)      devise/sessions#destroy
           member_password POST   /members/password(.:format)      devise/passwords#create
       new_member_password GET    /members/password/new(.:format)  devise/passwords#new
      edit_member_password GET    /members/password/edit(.:format) devise/passwords#edit
                           PUT    /members/password(.:format)      devise/passwords#update
cancel_member_registration GET    /members/cancel(.:format)        registration#cancel
       member_registration POST   /members(.:format)               registration#create
   new_member_registration GET    /members/sign_up(.:format)       registration#new
  edit_member_registration GET    /members/edit(.:format)          registration#edit
                           PUT    /members(.:format)               registration#update
                           DELETE /members(.:format)               registration#destroy
                 dashboard        /dashboard(.:format)             home#dashboard
                  register        /register(.:format)              registration#register
                      root        /                                home#index

型号：

class ToDoList < ActiveRecord::Base
  attr_accessible :is_favorite, :name, :description
  has_many :tasks,  dependent: :destroy
  belongs_to :member

控制器：

class ToDoListController < ApplicationController
  def index
    @todo_lists = ToDoList.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @todo_lists }
    end
  end


  def new
    @todo_list = ToDoList.new

   respond_to do |format|
     format.html # new.html.erb
     format.json { render json: @todo_list }
   end
 end

Answer 1

试试：

将控制器重命名为：

类 ToDoListsController

同时更改您的文件名和目录名。