测试抱怨NoMethodError：nil：NilClass的未定义方法“名称”

刚刚添加bcrypt了一个password_digest列到数据库。现在，我收到此错误。就是说它不识别名字，这个测试通过了。现在失败了。所有其他测试都通过了（password_digest奇怪的是，其中之一）。我正在使用Rails附带的测试框架。

  def test_can_create_profiles
    user = create_user('[email protected]', 'hassan') #creates a profile with randomized password
    assert_equal "hassan", User.find_by_email('[email protected]').name
  end 

捆绑执行佣金测试

  1) Error:
UserTest#test_can_create_profiles:
NoMethodError: undefined method `name' for nil:NilClass
    test/models/user_test.rb:9:in `test_can_create_profiles'



class User < ActiveRecord::Base
  email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  before_save {self.email = email.downcase}  
  validates :name, presence: true, length: { maximum: 20 }
  validates :email, :presence => true,
    :format => { :with => email_regex },
    :uniqueness => { :case_sensitive =>
      false }
  has_secure_password
end

如果有任何我缺少的信息，请告诉我。

def create_user(email, name)
  user = User.new(name: name, email: email)
  user.password_digest = (0...8).map { (65 + rand(26)).chr }.join
  user.save
  user
end

GHGH

x = User.new
=> #<User id: nil, name: nil, email: nil, created_at: nil, updated_at: nil, password_digest: nil>
irb(main):002:0> x.name ='lol'
=> "lol"
irb(main):005:0> x.email = '[email protected]'
=> "[email protected]"

irb(main):007:0> x.password_digest = 'lol'
=> "lol"
irb(main):008:0> x.save
   (0.1ms)  begin transaction
  User Exists (0.3ms)  SELECT 1 AS one FROM "users" WHERE LOWER("users"."email") = LOWER('[email protected]') LIMIT 1
   (0.1ms)  rollback transaction
=> false

好的，问题出在这里！

irb(main):010:0> raise x.errors.inspect
RuntimeError: #<ActiveModel::Errors:0x007f6fae5b3bf8 @base=#<User id: nil, name: "lol", email: "[email protected]", created_at: nil, updated_at: nil, password_digest: "lol">, @messages={:password=>["can't be blank"]}>

irb(main):013:0> raise x.password= 'hello'
RuntimeError: hello
    from (irb):13
    from /home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/railties-4.0.1/lib/rails/commands/console.rb:90:in `start'
    from /home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/railties-4.0.1/lib/rails/commands/console.rb:9:in `start'
    from /home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/railties-4.0.1/lib/rails/commands.rb:62:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'
irb(main):014:0> raise x.errors.inspect
RuntimeError: #<ActiveModel::Errors:0x007f6fae5b3bf8 @base=#<User id: nil, name: "lol", email: "[email protected]", created_at: nil, updated_at: nil, password_digest: "$2a$10$CMPQdQSLKQTS5r0G2a1oheDhblzxcp65KxStZbKKAHmy...">, @messages={:password=>["can't be blank"]}>
    from (irb):14
    from /home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/railties-4.0.1

：：c

为什么会这样呢？

编辑：bcrypt要求输入password和password_confirmation字段。

那就是造成麻烦以及测试失败的原因。>。<