ruby-on-rails - 在 Rails 3 中为所有目的继承模型和更改表

Question

我有一个类定义了打开的工单和另一个用于关闭的工单:

class Ticket < ActiveRecord::Base
  [validations]
  [callbacks]
end

class ClosedTicket < Ticket
  self.table_name = "closed_tickets"
end

我想将关闭的工单移动到closed_tickets 表中。但是当模型执行验证时，它确实使用父类(super class)表名，因此它们失败了。

ClosedTicket.table_name => "closed_tickets"
ClosedTicket.create(Ticket.first.attributes)
Ticket Exists (0.8ms)  SELECT 1 AS one FROM `tickets` WHERE...
=> ["ID has already been taken"]

ClosedTicket.table_name => "closed_tickets"
closed_ticket = ClosedTicket.new(Ticket.first.attributes)
closed_ticket.save
Ticket Exists (0.8ms)  SELECT 1 AS one FROM `tickets` WHERE...

对于如何修复所有方法和验证的表名，我没有任何线索。

Answer 1

ClosedTicket.table_name => "closed_tickets"
closed_ticket = ClosedTicket.new(Ticket.first.attributes)
closed_ticket.save