ruby-on-rails - 属于准STI对象的多态对象：object_type不正确

Question

考虑：

class Person < ActiveRecord::Base
  class << self
    def setup
      has_one :address, :as => :addressable
    end
  end
end

class Employee < Person
  setup
end

class Address < ActiveRecord::Base
  belongs_to :addressable, :polymorphic => true
end

# Shouldn't this be 'Employee'? Is it possible to override?
Employee.create.address.create.addressable_type == 'Person'

编辑：我在那里困惑了一段时间。这不是真正的 STI，它只是继承，就像Employee它自己的表一样。

谢谢！

Answer 1

Bingo:

class Person < ActiveRecord::Base
  self.abstract_class = true
end