如何一个Hash对象添加到ActiveRecord类？尝试，但迁移失败 [英] How to add a Hash object to an ActiveRecord class? Tried but migration fails

问题描述

我希望我的ActiveRecord类用户来包含选项（一串一串的键值），所以我写了：

I want my ActiveRecord class User to contain options (a bunch of string key-values), so I wrote:

rails generate migration AddOptionsToUser options:Hash

它产生的：

class AddOptionsToUser < ActiveRecord::Migration
  def self.up
    add_column :users, :options, :Hash
  end

  def self.down
    remove_column :users, :options
  end
end

我还添加了此行我的课用户：

serialize :options, Hash

但迁移失败：

But the migration fails:

Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Hash' at line 1: ALTER TABLE `users` ADD `options` Hash

我是新来的Rails，什么是存储一串字符串键值在ActiveRecord类常用的方法是什么？

I am new to Rails, what is the usual way to store a bunch of string key-values in an ActiveRecord class?

推荐答案

让Ruby对象的ActiveRecord模型，你应该使用连载方法，类里面的属性该属性链接

To have ruby object as an attribute of the ActiveRecord model you should use serialize method inside your class for that attribute link

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