Question

在示例登录程序中，我有两个类。会话和用户。用户表有两个字段名称，密码。在调用用户类的authenticate方法时，sessions方法继续获得“NoMethodError”。

用户类如下所示：

class UserController < ApplicationController
  def index
    @user = User.find(:first, :order => 'RANDOM()')
  end

  def show
   @user = User.find(:all)
  end

  def new
    @user = User.new
   #redirect_to user_path
  end

  def create
    @user = User.new(params[:user])
    @user.save
    #redirect_to 'http://localhost:3000/user/show'
  end


  def self.authenticate( password)
    #user = User.find_by_name(name)

    if user.find_by_password(password)#match_password(password)
      return true
    else
      return false
    end
  end

 def self.match_password(password="")
   encrypted_password == BCrypt::Engine.hash_secret(password, salt)
 end  
end

sessions类有create方法，它调用用户的authenticate fn。这是创造方法

def create
   user = User.find_by_name(params[:session][:name].downcase)

   if user && user.authenticate(params[:session][:password])
     # Sign the user in and redirect to the user's show page.
     sign_in user
     redirect_to user
   else
     flash.now[:error] = 'Invalid email/password combination' # Not quite right!
     render 'new'
   end
end

这是堆栈

Started POST "/sessions" for 127.0.0.1 at Sun Sep 30 15:21:02 -0400 2012
Processing by SessionsController#create as HTML
  Parameters: {"commit"=>"Sign in", "session"=>{"name"=>"ar", "password"=>"[FILTERED]"}, "authenticity_token"=>"vxYHw/4JV2fJuvvBN4GVLv31aBl8ETEtQPBB/483q/Q=", "utf8"=>"✓"}
  User Load (0.5ms)  SELECT "users".* FROM "users" WHERE "users"."name" = 'ar' LIMIT 1
Completed 500 Internal Server Error in 4ms

NoMethodError (undefined method `authenticate' for #<User:0xb69650e4>):
  app/controllers/sessions_controller.rb:10:in `create'

先谢谢，甲

Answer 1

此块应位于User模型中，而不是UserController中：

def self.authenticate( password)
  #user = User.find_by_name(name)

  if user.find_by_password(password)#match_password(password)
    return true
  else
    return false
  end
end

原因是您想要在User对象的实例上调用.authenticate，这是模型中发生的事情。

控制器中的功能通常用于提供请求，例如，响应有人访问您应用中的网址/users/123/authenticate（在这种情况下，这不是您想要的）。

用户类验证NoMethodError

1 个答案: