ruby-on-rails – 简单的语法错误让我疯狂 – Ruby on Rails

class Post < ActiveRecord::Base
  validates :name,:presence => true
  validates :title,:presence => true,:length => { :minimum => 5 }
end

我的副本中有这个：

class Post < ActiveRecord::Base 
validates :name,validates :title,:length =>  {  :minimum => 5  }

end

据我所知,这是正确的,但是当我运行页面时,我收到这些错误消息：

c:/Sites/blog/app/models/post.rb:3: syntax error,unexpected tSYMBEG,expecting kDO or '{' or '('
validates :Title,^
C:/Sites/blog/app/models/post.rb:3: Can't assign to true
C:/Sites/blog/app/models/post.rb:4: syntax error,unexpected tASSOC,expecting tCOLON2 or '[' or '.'
         :length =>  {  :minimum => 5  }

谁能指出我做错了什么？对我来说似乎完全一样.