Question

请帮帮我。我不确定我是否有路线问题或复数，但是这个错误发生了，不再知道该做什么，已经在很多地方研究过，什么都没有。

我开始设计一个迷你教程并且有效，登录工作正常。所以我想重用它并构建一个待办事项列表。

当我将部分渲染放到我希望他们留在字段中创建待办事项列表时，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

尝试：

将Controller重命名为：

类ToDoListsController

也相应地更改文件名和目录名。

Home #index中的NoMethodError

1 个答案: