عرض عملي: تصميم عقد Shop API على السبورة

خطوة بخطوة

1. List nouns from requirements: product, category, cart, cart item, order.
2. Draw collections and sub-resources, then write one URL per use case.
3. Fill a table: method, URL, success code, error codes.
4. Planned mistake: add POST /addToCart and POST /placeOrder. Fix: POST /carts/{id}/items and POST /carts/{id}/checkout (or POST /orders).
5. Write one example request and response per endpoint.
6. Peer-review with the checklist: nouns, plural, status codes, no leaked database structure.