What are state machines? (feat. Ash Framework)

An introduction to state machines and a tutorial on refactoring Elixir code to use the Ash State Machine package.

State machines are important data models to be used in situations with a series of known states and well-defined transition rules. From light switches to cars, vim, and even payment processing—these come up more often than you might think. Elixir's Ash Framework has a package that makes managing state machines easy, consistent, and well-documented. Links: Screen recording software I use (affiliate): screen.studio/@Yy75o Project Repo: github.com/ChristianAlexander/money_pit (look at git tags for pre- and post-refactor) Ash Framework: ash-hq.org/ Ash State Machine: hexdocs.pm/ash_state_machine Ash Oban: hexdocs.pm/ash_oban Timestamps: State machines? - 00:00 Demo - 02:10 What's Ash? - 02:35 Demo code walkthrough - 03:27 Refactoring to ash_state_machine - 07:16 State permissions in one line - 09:06 Other Ash niceties - 10:18 YouTube Academy Competition: #TeamHailey