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Versioned finite-state machines with Postgres (2019)
Inspired by Felix Geisendorfer blog post I implemented a database FSM (Finite-State Machine) with Postgresql. I brought some improvements to Felix’s implementation but before reading the following I recommend you to read carefully the original post.
Inspired by Felix Geisendorfer blog post I implemented a database FSM (Finite-State Machine) with Postgresql. To keep it simple I’ll use exactly the same FSM graph than Felix: an ordering process with payment and shipment steps. If I change my transition function and table without taking care of past order_events, I will completly break my FSM.
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