Question

假设我有这个类（直接取自aasm文档）：

class Job < ActiveRecord::Base
  include AASM

  aasm do
    state :sleeping, :initial => true
    state :running
    state :cleaning

    event :run do
      transitions :from => :sleeping, :to => :running
    end

    event :clean do
      transitions :from => :running, :to => :cleaning
    end

    event :sleep do
      transitions :from => [:running, :cleaning], :to => :sleeping
    end
  end

end

我不太喜欢将状态机定义与我的类定义混合的事实（因为当然在实际项目中我会向Job类添加更多方法）。

我想在模块中分离状态机定义，以便Job类可以是以下内容：

class Job < ActiveRecord::Base
  include StateMachines::JobStateMachine
end

然后我在app / models / state_machines中创建了一个job_state_machine.rb文件，内容类似于：

module StateMachines::JobStateMachine
  include AASM

  aasm do
    state :sleeping, :initial => true
    state :running
    state :cleaning

    event :run do
      transitions :from => :sleeping, :to => :running
    end

    event :clean do
      transitions :from => :running, :to => :cleaning
    end

    event :sleep do
      transitions :from => [:running, :cleaning], :to => :sleeping
    end
  end

end

但这不起作用，因为AASM被包含在不在Job类中的模块中......我甚至尝试将模块更改为：

module StateMachines::JobStateMachine
  def self.included(base)
  include AASM

  aasm do
    state :sleeping, :initial => true
    state :running
    state :cleaning

    event :run do
      transitions :from => :sleeping, :to => :running
    end

    event :clean do
      transitions :from => :running, :to => :cleaning
    end

    event :sleep do
      transitions :from => [:running, :cleaning], :to => :sleeping
    end
  end
  end
end

但仍然没有用......任何提示或建议都非常感激。

谢谢，纳齐奥西隆

编辑：

感谢Alto，正确的解决方案就是：

module StateMachine::JobStateMachine

  def self.included(base)
    base.send(:include, AASM)

    base.send(:aasm, column: 'status') do
    ....
    end
  end
end

显然要记得在主类中包含状态机定义，如下所示：

include StateMachine::JobStateMachine

Answer 1

你这么简单吗？

module StateMachines::JobStateMachine
  def self.included(base)
    base.send(:include, AASM)

    aasm do
      ...
    end
  end
end

AASM：将状态机定义与类定义分开

1 个答案: