Ruby-on-rails Rails 3 序列化
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Rails 3 Serialize
提问by AnApprentice
I'm looking to learn how to serialize data in Rails 3...
我正在寻找学习如何在 Rails 3 中序列化数据......
Things I'd like to learn:
我想学习的东西：
- A. What serialized data looks like (example for photo_id: 123123, photo_name: "Blah)
- B. How to serialize data in Rails 3
- C. How to extract serialized data to do something like mydate.photo_id given the above.
- A. 序列化数据是什么样的（例如 photo_id: 123123, photo_name: "Blah）
- B. 如何在 Rails 3 中序列化数据
- C. 如何提取序列化数据来做类似上面给出的 mydate.photo_id 的事情。
Thanks!
谢谢！
回答by tfe
ActiveRecord has this build in: http://api.rubyonrails.org/classes/ActiveRecord/Base.html#method-c-serialize
ActiveRecord 有这个内置：http: //api.rubyonrails.org/classes/ActiveRecord/Base.html#method-c-serialize
If you specify in your model that an attribute is serialized, then AR transparently handles the serialization/deserialization. When you call the accessor, it'll deserialize on the fly return the Ruby object (hash, array, whatever). Then you can modify the object as you would normally, and when you save the record, it'll re-serialize and store it.
如果您在模型中指定将属性序列化，则 AR 会透明地处理序列化/反序列化。当您调用访问器时，它会即时反序列化并返回 Ruby 对象（散列、数组等）。然后你可以像往常一样修改对象，当你保存记录时，它会重新序列化并存储它。
