Rails的：存储像ActiveRecords静态数据 [英] Rails: Storing static data like ActiveRecords

问题描述

我一直在寻找的宝石和/或实现静态存储器相似ActiveRecords而不是基于数据库的插件一段时间。让我们把这个类NonDBRecord。它应具有以下性质：

 类Foo＆LT; NonDBRecord
  方法add_item（'A'，：property1 =＆GT;一些价值：property2 =＆GT;更多的价值）
  方法add_item（B：property1 =＆GT;一些价值：property2 =＆GT;更多的价值）
结束

班巴≤;的ActiveRecord :: Base的
  belongs_to_nondbrecord：FOO，：将class_name =＆GT; '富'
结束

＃NonDBRecord自动声明常量
[富:: A，富:: B]

＃NonDBRecord是枚举
Foo.all＃返回[美孚:: A，富:: B]

＃NonDBRecord是基于身份
Bar.create（：foo_id =＆GT;富:: A.id）

＃...所以你可以通过它搜索
X = Bar.find（：第一，：条件=＆GT; {：foo_id =＆GT;富:: A.id}）

＃...和存储，检索，且通过它的id实例
x.foo＃返回美孚::一个
 

我想过简单地使用ActiveRecords（和数据库存储），但我不感觉良好。另外我不得不周围的一些预先加载的问题与ActiveRecord的解决方案脚尖。任何帮助将是AP preciated之前，我开始写我自己的解决方案。

修改的

这些记录，目的是要枚举。例如，假设你正在做一个纸牌游戏。我希望能够像做

 类卡＆LT; NonDBRecord
  attr_reader：西装，：指数
结束
类游戏
  belongs_to的：wild_card，：将class_name =＆GT; '卡'
结束
 

解决方案

我想说加载ActiveModel是你所期待的。它配备了Rails 3和封装所有来自ActiveRecord的东西，如验证，序列化和各种各样的。有一个瑞安贝茨 railscast 在这个问题上。希望这有助于！

I've been looking for a while for gems and/or plugins that implement static storage similar ActiveRecords but is not database-based. Let's call this class NonDBRecord. It should have the following property:

class Foo < NonDBRecord
  add_item('a', :property1 => 'some value', :property2 => 'some more value')
  add_item('b', :property1 => 'some value', :property2 => 'some more value')
end

class Bar < ActiveRecord::Base
  belongs_to_nondbrecord :foo, :class_name => 'Foo'
end

# NonDBRecord declare constants automatically
[ Foo::A, Foo::B ]

# NonDBRecord is enumerable
Foo.all # returns [Foo::A,Foo::B]

# NonDBRecord is id-based
Bar.create(:foo_id => Foo::A.id)

# ...so you can search by it
x = Bar.find(:first, :conditions => { :foo_id => Foo::A.id })

# ...and is stored, retrieved, and instantiated by its id
x.foo # returns Foo::A

I've thought about simply using ActiveRecords (and database storage), but I don't feel good about it. Plus I've had to tip-toe around some eager loading problems with the ActiveRecord solution. Any help would be appreciated before I start writing my own solution.

edit

These records are meant to be enumerations. For example, let's say you're making a card game. I want to be able to do something like

class Card < NonDBRecord
  attr_reader :suit, :index
end
class Game
  belongs_to :wild_card, :class_name => 'Card'
end

解决方案

I would say ActiveModel is what you are looking for. It comes with Rails 3 and encapsulates all kind of goodies from ActiveRecord, such as Validation, Serialization and sorts. There is a Ryan Bates railscast on that issue. Hope this helps!

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