回调队列Rails

Question

class Post < ActiveRecord::Base
    has_many :comments, dependent: :destroy
    before_destroy :post_method1
    after_destroy  :post_method2
end


class Comment < ActiveRecord::Base
    belongs_to :post
    after_destroy :comment_method
end

在post.destroy之后(if post.comments.any? = true)之后，如何在两个模型中对回调和销毁方法进行排序？