Rails 3-如何创建一个JSON对象存储在数据库中 [英] Rails 3 - How to Create a JSON Object to store in the database

问题描述

我正在创建一个AuditLog观察器，用于监视多个模型.

I'm creating an AuditLog observer that watches over several models.

我希望观察者具有一个after_create，它创建一个存储在数据库列中的JSON对象.它将包含{photoid:123，photoname:"asdasd"，creator_id:"asdasd"}等数据……

I'd like the observer to have an after_create, which creates a JSON object that is stored in a database column. It will contain data like {photoid:123, photoname: "asdasd", creator_id: "asdasd"} etc...

在Rails中，如何创建这种JSON对象，然后将其与其他非JSON字段一起插入数据库?

In Rails, how do I create this type of JSON object and then how do I insert it into the DB along with other non-JSON fields?

谢谢

推荐答案

当前版本的rails支持开箱即用的json序列化.在迁移中将您的字段定义为字符串(或文本)，然后:

Current versions of rails support json serialisation out of the box. Define your field as a string (or text) in the migration and then:

class Foo < ActiveRecord::Base
  serialize :field, JSON
end

bar = Foo.new
bar.field = [1,2,3]
bar.save

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