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Requirements

Domain

Computer hardware store (e-commerce, sorry 💔)

Commentary

🎦 YouTube (PL):

  1. What is model?
  2. What is aggregate?
  3. Trade offs in model - DDD trilemma

Requirements

  • max. 2 items of each product
    • [motivation] otherwise you're not individual customer but wholesale customer and you should go through different process
  • *order value not greater than 20000 PLN for cash payment
    • [motivation] this rule is enforced by Polish law that requires cashless payment for B2C transactions above this value
      • [similiar case] there is also 15000 PLN cash payment limit for B2B transactions that we can include here too or leave it as separate feature
  • products with limited availability have limit 1 per customer per quarter
    • [motivation] to avoid "scalping" practice by resellers, that purchase products like Sony PlayStation 5 console or NVIDIA RTX graphic cards and then resell them for much higher price (goal: fair chances for each customer)