Ruby 序列化的属性没有作为正确的对象返回

我的模型serialize中有一个序列化属性：顶点，数组。在使用它时，一切似乎都正常，但在重新加载控制台或web请求后，序列化的数组将作为字符串返回，这显然不是我所期望的。以下是rails控制台中的相同过程：

ruby-1.9.2-p290 :009 > g.vertices = [Vertex.new, Vertex.new]
 => [#<Vertex:0x000000036315e8 @neighbours={}, @options={}, @name=nil, @real_name=nil, @teacher=nil, @discipline=nil, @student_group=nil>, #<Vertex:0x00000003631458 @neighbours={}, @options={}, @name=nil, @real_name=nil, @teacher=nil, @discipline=nil, @student_group=nil>] 
ruby-1.9.2-p290 :010 > g.inspect
 => "#<Graph id: 17, vertices: [#<Vertex:0x000000036315e8 @neighbours={}, @options={}, @name=nil, @real_name=nil, @teacher=nil, @discipline=nil, @student_group=nil>, #<Vertex:0x00000003631458 @neighbours={}, @options={}, @name=nil, @real_name=nil, @teacher=nil, @discipline=nil, @student_group=nil>], oriented: true, max_index: 0, trigger_limit: nil, created_at: \"2011-11-01 09:13:40\", updated_at: \"2011-11-01 09:17:30\", name: nil>" 
ruby-1.9.2-p290 :011 > g.save
   (0.4ms)  UPDATE "graphs" SET "vertices" = '---
- !ruby/object:Vertex
 neighbours: {}
 options: {}
 name: !!null 
 real_name: !!null 
 teacher: !!null 
 discipline: !!null 
 student_group: !!null 
- !ruby/object:Vertex
 neighbours: {}
 options: {}
 name: !!null 
 real_name: !!null 
 teacher: !!null 
 discipline: !!null 
 student_group: !!null 
', "updated_at" = '2011-11-01 09:21:11.516199' WHERE "graphs"."id" = 17
 => true 
ruby-1.9.2-p290 :012 > g.inspect
 => "#<Graph id: 17, vertices: [#<Vertex:0x000000036315e8 @neighbours={}, @options={}, @name=nil, @real_name=nil, @teacher=nil, @discipline=nil, @student_group=nil>, #<Vertex:0x00000003631458 @neighbours={}, @options={}, @name=nil, @real_name=nil, @teacher=nil, @discipline=nil, @student_group=nil>], oriented: true, max_index: 0, trigger_limit: nil, created_at: \"2011-11-01 09:13:40\", updated_at: \"2011-11-01 09:21:11\", name: nil>" 
ruby-1.9.2-p290 :013 > reload!
Reloading...
 => true 
ruby-1.9.2-p290 :014 > g = Graph.last
  Graph Load (0.1ms)  SELECT "graphs".* FROM "graphs" ORDER BY "graphs"."id" DESC LIMIT 1
 => #<Graph id: 17, vertices: "---\n- !ruby/object:Vertex\n  neighbours: {}\n  option...", oriented: true, max_index: 0, trigger_limit: nil, created_at: "2011-11-01 09:13:40", updated_at: "2011-11-01 09:21:11", name: nil> 
ruby-1.9.2-p290 :015 > g.vertices.class
 => String 
ruby-1.9.2-p290 :016 > 

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我猜它没有正确地反序列化可能是因为我在数组中的自定义类？任何提示都将不胜感激。谢谢。

保存序列化的Ruby实例并不十分优雅。我建议使用一种更传统的方法，例如composed_of，或任何其他实际保存参数以将实例构建到DB中而不是实例本身的解决方案：

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是的，这绝对不是最漂亮的解决方案，但我不想创建数千个顶点对象并将它们放入数据库，如果它只用于一些计算。我仍然在想，为什么它不能工作？它的经典对象序列化如果我保存字符串、哈希或其他一些通用结构，它会工作吗？