启动服务器时出现未定义的方法“root”错误答案

【问题标题】：Undefind Method 'root' error when i start server启动服务器时出现未定义的方法“root”错误
【发布时间】：2015-03-04 09:26:55
【问题描述】：

您好，我正在使用 sourcery gem 和本教程 https://github.com/NoamB/sorcery/wiki/Simple-Password-Authentication 为我的网站创建登录名

我已经完成了教程。

当我尝试启动服务器时出现此错误。

Josephs-Mac-Pro:safsy josephk$ rails s => 启动 WEBrick => Rails 4.2.0 应用程序开始在http://localhost:3000 上开发 => 运行rails server -h 以获得更多启动选项 => Ctrl-C 关闭服务器退出 /Users/joseph/Desktop/safsy/config/routes.rb:1:in <top (required)>': undefined methodroot' for main:Object (NoMethodError)

我该如何解决这个错误？我完全按照教程进行。

这是我的路线文件

root'users#index'
resources :user_sessions
resources :users

get 'login' => 'user_sessions#new', :as => :login
post 'logout' => 'user_sessions#destroy', :as => :logout

用户控制器

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]
  skip_before_filter :require_login, only: [:index, :new, :create]
  if @user.save
  redirect_to(:users, notice: 'User was successfully created')

  # GET /users
  # GET /users.json
  def index
    @users = User.all
  end

  # GET /users/1
  # GET /users/1.json
  def show
  end

  # GET /users/new
  def new
    @user = User.new
  end

  # GET /users/1/edit
  def edit
  end

  # POST /users
  # POST /users.json
  def create
    @user = User.new(user_params)

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, notice: 'User was successfully created.' }
        format.json { render :show, status: :created, location: @user }
      else
        format.html { render :new }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /users/1
  # PATCH/PUT /users/1.json
  def update
    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to @user, notice: 'User was successfully updated.' }
        format.json { render :show, status: :ok, location: @user }
      else
        format.html { render :edit }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1
  # DELETE /users/1.json
  def destroy
    @user.destroy
    respond_to do |format|
      format.html { redirect_to users_url, notice: 'User was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_user
      @user = User.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def user_params
      params.require(:user).permit(:email, :password, :password_confirmation)
    end
end

【问题讨论】：

这是您的routes.rb 文件的完整内容吗？
你真的没有把ended if block 放到控制器里吗？

标签： ruby-on-rails ruby-on-rails-4

【解决方案1】：

您必须将 routes.rb 的内容包装在传递给 draw 方法的块中：

Rails.application.routes.draw do
  root'users#index'
  resources :user_sessions
  resources :users

  get 'login' => 'user_sessions#new', :as => :login
  post 'logout' => 'user_sessions#destroy', :as => :logout
end

【讨论】：