ruby-on-rails – rails模型子类 – >多表继承或多态

class Layer < ActiveRecord::Base
  has_and_belongs_to_many :components
end

class Component < ActiveRecord::Base
  has_and_belongs_to_many :layers 
end

class ImageComponent < Component
  # I want this table to inherit from the Component table
  # I should be able to add image-specific fields to this table
end

class VideoComponent < Component
  # I want this table to inherit from the Component table
  # I should be able to add video-specific fields to this table
end

我想要做什么：

layer.components << ImageComponent.create
layer.components << VideoComponent.create

实际上,我意识到ImageComponent和VideoComponent实际上必须继承自ActiveRecord :: Base.有没有办法在Rails中很好地实现模型子类化？

现在我有我的组件模型设置是多态的,使ImageComponent和VideoComponent各有has_one：component,as：：componentable.这给我的代码增加了一层烦恼和丑陋：

image_component = ImageComponent.create
component = Component.create
component.componentable = image_component
layer.components << component

我想一个简单的方法来解释这是我想在层和组件之间实现一个habtm关系.我有多种类型的组件(即ImageComponent,VideoComponent),每个组件具有相同的基本结构,但与它们相关联的不同字段.有关这方面可以实现的任何建议？我觉得我缺少一些东西,因为我的代码感觉到黑客.