ruby-on-rails - RoR - SessionsController 中的 ArgumentError#create 错误数量的参数(1 对 2)

Question

我是 RoR 的新手，我正在按照本教程从头开始制作用户身份验证系统:http://railscasts.com/episodes/250-authentication-from-scratch .我整个周末都被这条错误消息挂断了:

ArgumentError in SessionsController#create: wrong number of arguments (1 for 2). 

这是我的 session Controller 的代码:

class SessionsController < ApplicationController
  def new
  end

  def create
    user = User.authenticate(:email => params[:email], :password => params[:password])
    if user
        session[:user_id] = user.id
        redirect_to root_url, :notice => "Logged in!"
    else
        flash.now.alert = "Invalid email or password"
        render "new"
    end
  end
end

这是来 self 的 user.rb 模型的代码(错误消息在第 10 行给出了提取的源代码 => def self.authenticate (email, password)

class User < ActiveRecord::Base

attr_accessor :password
validates_confirmation_of :password
validates_presence_of :email
validates_uniqueness_of :email
validates_presence_of :password, :on => :create # needed to move line up from below to. Cannot encrypt password without validating password
before_save :encrypt_password

def self.authenticate (email, password)
    user = find_by_email(email)
    if user && user.password_hash == BCrypt::Engine.hash_secret(password, user.password_salt)
        user
    else
        nil
    end
end

def encrypt_password
    if password.present?
        self.password_salt = BCrypt::Engine.generate_salt
        self.password_hash = BCrypt::Engine.hash_secret(password, password_salt)
    end
end     

结束

Answer 1

模型中的

authenticate 方法采用两个参数，但您只传递一个参数(具有两个键的散列)。将其更改为:

User.authenticate(params[:email], params[:password])