Ruby on rails 什么是'；s轨道中的aasm柱

我是rails的新手，我正在做一个有此代码的项目

 aasm_column :status
  aasm do
    state :unregistered, initial: true
    state :pending, enter: :enter_pending_state
    state :activated, enter: :enter_activated_state
    state :disabled

    event :register do
      transitions from: :unregistered, to: :pending, guard: :valid?
    end

    event :activate do
      transitions from: [ :unregistered, :pending ], to: :activated
      transitions from: :pending, to: :activated, guard: :valid?
    end

    event :disable do
      transitions from: [ :pending, :activated ], to: :disabled, guard: :valid?
    end

    event :enable do
      transitions from: :disabled, to: :activated, guard: Proc.new { |u| u.activation_code.blank? && u.valid? }
      transitions from: :disabled, to: :pending, guard: Proc.new { |u| !u.activation_code.blank? && u.valid? }
    end
  end

before_create :enter_pending_state, if: Proc.new{|u|  u.pending? }

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“aasm”一栏的意思是什么？做这件事的陈词滥调是什么？

“aasm”可能代表“作为状态机的行为”，这是一个为对象提供“有限状态机”功能的宝石，如果您正在学习Rails，那么尝试接管另一个现有项目是了解Rails最糟糕的方式。你需要先从下到上学习它，否则你会完全迷失和困惑。我读过它，但不了解它，它是如何工作的，或者我们为什么要实施它？