Question

遵循Hartl的RailTutorial for Rails（3.2）。我一直收到此错误消息或奇怪的是“连接已重置”消息：

ActiveRecord::RecordNotFound in UsersController#show 
Couldn't find User without an ID

我正在尝试登录，成功登录后，我希望应用程序将用户重定向到user / show.html.erb。我相信我在用户控制器的show方法中传递了：id参数。任何提示/帮助将不胜感激！

我在下面粘贴了一些相关文件。如果你们还需要其他任何东西，请告诉我。

sessions_controller.rb

class SessionsController < ApplicationController

def new
  @title = "Log in"
end

def create
  user = User.find_by_email(params[:session][:email])               
  if user.nil?
     flash.now[:error] = "Invalid email/password combination."
      @title = "Sign in"
      render 'new'
   else
     flash.now[:success] = "Successful login!"
     sign_in user
      redirect_to 'users/show'
    end
 end

def destroy
    sign_out
    redirect_to root_path[:name]
end
end

users_controller.rb

class UsersController < ApplicationController


def new
  @user = User.new
  @title = "Sign up"
end

def show
  if params[:id].nil? && current_user
    @user = current_user
  else
    @user = User.find(params[:id])
  end
  @title = @user.name
  end


def create
  @user = User.new(params[:user])
  if @user.save
    sign_in @user
    flash[:success] = "Account created!"
    redirect_to @user
   else
     @title = "Sign up"
     render 'new'
   end
  end

def destroy
  @user.destroy
  redirect_to users_path, :flash => { :success => "User destroyed." }
 end

end

的routes.rb

SampleApp::Application.routes.draw do

  resources :users
  resources :sessions, :only => [:new, :create, :destroy]   


  match '/sessions', :to => 'users#show'
  match '/signup', :to => 'users#new'
  match '/login', :to => 'sessions#new'
  match '/logout', :to => 'sessions#destroy'

  root :to => 'pages#home'

编辑：添加了sessions_helper.rb

module SessionsHelper

def sign_in(user)
    cookies.permanent.signed[:remember_token] = user.remember_token
    current_user = user
end


def signed_in?
  !current_user.nil?
end

def current_user=(user)
    @current_user = user
end

def current_user
  @current_user ||= user_from_remember_token
end


def sign_out
  cookies.delete(:remember_token)
  current_user = nil
end

private

def user_from_remember_token
  remember_token = cookies[:remember_token]
  User.find_by_remember_token(remember_token) unless remember_token.nil?
end



end

Answer 1

我认为在会话控制器中的def创建中你没有传递任何id。如果您有会话用户ID，请通过

代码可以

redirect_to 'user/show' , :id => session[:user_id]
redirect_to user_url(:session[:user_id])

请你查一下current_user。像渲染一样

render :text => current_user.inspect and return false 在会话控制器之前

redirect_to user_url(:session[:user_id])

。如果没有，则验证中存在问题。

Answer 2

在您的情况下，似乎current_user是nil。我们来看看您的UsersControllers show动作。它正在尝试查找id为params[:id]的用户记录，如果您的网址为 users / show ，则该记录未设置。查找ActiveRecords find方法期望查找记录并抛出错误。

尝试找出current_user评估为nil的原因。可能是您刚刚登录，或者您的实施中存在错误。

ActiveRecord :: RecordNotFound - 找不到没有ID的用户

2 个答案: