場当たり的なコールバック回避

gistfile1.rb

class Foo < ActiveRecord::Base
  after_save :do_something, unless: :other_situation?

  class << self
    def other_situation
      begin
        Thread.current[:other_situation] = true
        yield
      ensure
        Thread.current[:other_situation] = nil
      end
    end
  end

  def do_something

  end

  def other_situation?
    Thread.current[:other_situation]
  end
end


Foo.other_situation do
  foo.save!
end