Question

我正在读一本书（Beginning Rails 3），但在Rails 4上尝试了一切。

所以，我有一个问题：

  def self.authenticate(email, password)
    user = where('email = ?', email)
    return user if user && user.authenticated?(password)
  end

  def authenticated?(password)
    self.hashed_password == encrypt(password)
  end

当我在rails console中执行此操作时：

User.authenticate('test@test.com', 123)

Rails返回错误Undefined method authenticated?。

  irb(main):034:0> User.authenticate('test@test.com', 123)
  NoMethodError:   ←[1m←[35mUser Load (1.0ms)←[0m  SELECT "users".* FROM "users" WHERE (email = 'test@test.com')
  undefined method `authenticated?' for #<ActiveRecord::Relation []>
          from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0/lib/active_record/relation/delegati
  on.rb:121:in `method_missing'
          from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0/lib/active_record/relation/delegati
  on.rb:68:in `method_missing'
          from C:/Sites/rails-estudo-blog/app/models/user.rb:23:in `authenticate'
          from (irb):34
          from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in `st
  art'
          from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in `sta
  rt'
          from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/commands.rb:64:in `<top (requ
  ired)>'
          from bin/rails:4:in `require'
          from bin/rails:4:in `<main>'
  irb(main):035:0>

怎么了？

Rails 4.0
Ruby 2.0
Windows 7 x64

Answer 1

而不是user = where('email = ?', email)您应该user = where('email = ?', email).first

未定义的身份验证？ Rails中的方法4

1 个答案: