最佳实践:我应该对静态数据使用 AR 模型还是全局哈希? [英] Best practice: should I use an AR Model or a global Hash for static data?

问题描述

我在考虑建立一个社交网站.我的用户模型应该有一个属性eyecolor"，它可以在带有选择框/下拉列表的视图页面上设置.

I'm thinking about a social networking-site. My user-model should have an attribute "eyecolor", which could be set on a view-page with a select-box/dropdownlist.

我的问题:-> 我应该制作 AR 模型还是应该对数据使用全局散列/常量?静态模型"有最佳实践吗?

My question: -> should I make a AR-Model or should I use a global Hash/Constant for the data? Is there a best practice for "static-models"?

以及如何将没有 AR 模型的关注与关系关联起来:

And how do I associate following without an AR-Model with relations:

u = User.first 
u.eyecolor 
==> 1 (not the eyecolor-string!)

我需要的是eyecolor-string:

What I need is the eyecolor-string:

u = User.first 
u.eyecolor 
==> "brown"

谢谢，对不起，我的英语不好！

Thanks, sorry for my bad english!

推荐答案

您可以创建一个模型来处理您的眼睛颜色逻辑:

You could create a model to handle your eye-color logic:

class EyeColor
   COLORS = ['blue','brown','hazel']

   attr_accessor :color

   # Some logic methods...
   def is_brown?
     self.color == 'brown'
   end

end

注意:此模型不是 Active Record 模型，但它确实创建了您尝试建模的真实世界对象的抽象.

Note: this model is not an Active Record model, but it does create an abstraction the real-world object you are trying to model.

我也喜欢这种方法，而不是全局散列，因为它可以在 EyeColor 内组织您的静态定义，而不是在您的程序中浮动，这使得该定义的位置很清楚.

I also like this approach as opposed to a global hash, because it gives it organizes your static definition within EyeColor instead of floating around in your program, which makes it clear where this definition is.

<%= select :user, :eye_color, EyeColor::COLORS %>

为谓词方法添加了问号.

added question mark to predicate method.

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