获取 state_machine Rails 中先前的状态
我正在 Rails 上使用 state_machine 开发状态机，这里我定义了不同的状态，根据条件状态将更改为另一个状态。这里我的问题是如何获得之前的状态？我的第二个问题是如何列出状态机中的所有状态？
我会用例子解释我的问题，说我有 3 个州说 state1,state2,state3 最初将处于 state1。当事件1是 执行状态从 state1=>state2 更改，现在我想知道 这是我之前的状态。请帮我解决这个问题。
I am developing state machine using state_machine on rails, here i have different states which is defined , based on conditions state will change to another state . Here my question is how to get the previous state? and my second question is how to list all the states in state machine ?
i will explain my question with example say i have 3 states say
state1,state2,state3 initially it will be in state1. when event1 is
executed state changes from state1=>state2 , now i wanted to know
which is my previous state. kindly help me out in figuring out this.
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这可能就是您正在寻找的内容：https://github.com/wvanbergen/state_machine-audit_trail
This may be what you're looking for: https://github.com/wvanbergen/state_machine-audit_trail
如果您正在寻找某个对象的先前状态列表，恐怕您不能。
state_machine 仅更改模型数据库寄存器中的列值，不存储任何类型的历史记录。
请检查acts_as_versioned (https://github.com/technoweenie/acts_as_versioned) 等解决方案来存储和使用您的模型版本。
您还想检查 aasm gem https://github.com/rubyist/aasm
干杯
if you are looking for the list of previous states from an object, i'm afraid u can not.
state_machine only changes a column value in your models database register, dosen't stores any type of history.
Please check solutions like acts_as_versioned (https://github.com/technoweenie/acts_as_versioned) to store and play with your models versions.
Also you want to check aasm gem https://github.com/rubyist/aasm
Cheers
我使用 paper_trail gem
并具体化了以前的版本。
这使我能够跟踪该对象经历的状态顺序。
使用 paper_trail，您甚至可以检索该状态更改的发起者或终结者。
I used paper_trail gem
and reified previous versions.
This allows me to follow up the sequence of states that the object went through.
With paper_trail you can even retrieve the Originator or Terminator of that state change.