取消关联的STI模型的关联

Question

我在称为User的STI父模型中设置了has_many关联，从User继承的模型是Group，并且我不希望Group具有has_many关联，有没有办法做到这一点？

Answer 1

The following should work:

class User < ActiveRecord::Base
  has_many :relations
end

class Group < User
  undef :relations
end