reality VS Spree Commerce

Thanks!

I am mentioning Wikidata/SPARQL in README (TL;DR: less data still, harder to discover unless you are deeply into SemWeb tech), but I expect this project, will it live long (fingers crossed) will definitely has some relations with Wikidata, too. My previous attempt on something similar: https://github.com/molybdenum-99/reality — used both Wikipedia and Wikidata (and OpenStreetMap and...) but however cool were few demos I managed too achieve, it was a dead end for several reasons.

A good system to study is Spree https://github.com/spree/spree. It has an inventory and billing system and supports different adjustments and sale configurations. If you don't want to use it wholesale it's a solid Rails application that does most of what you want so you can use it as solid inspiration.

Spree Commerce: https://spreecommerce.org/

Maybe Spree?

I'd say Solidus and Spree are you best options rather than trying to roll out you own ecommerce solution.

When I was working on that company, that mobile ordering app, Counterless, I looked a lot at codebases like Spree, the Spree Commerce codebase. And that's how I learned a lot about how do you model an order with line items and things like that? I saw some amazing things that helped me develop an understanding and save a ton of time by looking at oh, they have a state machine. What are the ways that an order transitions through all these different states as it gets processed and charged? And how do you track all of those things?