继承rails模型时如何写入不同的表？

Question

我有以下型号：

class Building < ActiveRecord::Base;end

class Department < Building;end

class Organization < Building;end

当我创建部门和组织并获取所有部门时

2.1.5 :008 > Department.all.count
(0.5ms)  SELECT COUNT(*) FROM "buildings"
=> 2 

我想参与这种情况

2.1.5 :008 > Department.all.count
(0.5ms)  SELECT COUNT(*) FROM "departments"
=> 1 

2.1.5 :008 > Organization.all.count
(0.5ms)  SELECT COUNT(*) FROM "organizations"
=> 1

2.1.5 :008 > Buildings.all.count
(0.5ms)  SELECT COUNT(*) FROM "buildings"
=> 2 

我该怎么做？

Answer 1

使用性病。有一个名为“建筑物”的表，其中有一列名为“类型”。让新类扩展 Building 类。每个类都可以选择拥有自己不同的关系。您将能够实例化 Building 并获取类型定义的类或直接实例化所需的类。