State Machine
state_machines
| State Machine | state_machines | |
|---|---|---|
| 1 | 5 | |
| 3,740 | 795 | |
| -0.0% | 1.0% | |
| 0.0 | 3.3 | |
| about 2 months ago | 11 days ago | |
| Ruby | Ruby | |
| MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
State Machine
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Programmers are bad at managing state (2020)
look at this gem https://github.com/pluginaweek/state_machine to get an idea of what features are possible
state_machines
- Gem adds support for creating state machines for attributes on any Ruby class
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Practical State Machinery
State Machines (Ruby) - A popular library providing a Ruby DSL for easily building finite state machines
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Why Developers Never Use State Machines (2011)
As a regular user of the state_machine Ruby gem, I wouldn't recommend it. If you don't believe me, just check out the "Class definition" section of the usage examples: https://github.com/state-machines/state_machines#usage
The problems are obvious. It's built on magic and indirection. This leads to difficult to debug state machine problems. For anything beyond simple state machines you quickly lose any idea of what your object is doing.
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ActiveRecord: Adding Boolean methods for DateTime columns
Might this be better handled with a state machine with active record integration?
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Ruby 3 Released
Here's an example of how it can happen - look at the code examples in https://github.com/state-machines/state_machines - almost everything you are coding is in the DSL of that library if you are using it:
What are some alternatives?
AASM - AASM - State machines for Ruby classes (plain Ruby, ActiveRecord, Mongoid, NoBrainer, Dynamoid)
Statesman - A statesmanlike state machine library.
Workflow - Ruby finite-state-machine-inspired API for modeling workflow
simple_states - A super-slim statemachine-like support library
StatefulEnum - A very simple state machine plugin built on top of ActiveRecord::Enum
state_shifter
FiniteMachine - A minimal finite state machine with a straightforward syntax.
transitions - State machine extracted from ActiveModel
LogStashLogger - Ruby logger that writes logstash events