Offline POS: store stock as a ledger, not a counter
by Stacklyn Labs dev.to
2 min read
Here is a stock bug that throws no error, passes every single-device test, and still loses inventory. The counter model The obvious model is a number on the product: product.stock = 12; // on each sale: product.stock -= quantitySold; On one device it works. Now add a second till, and let both work offline. Both tills start with stock = 12. Till A sells 2, so it stores 10. Till B sells 3, so it st…
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