"Coupon"

0 articles

Order Payment Pipeline: Coupon + Flash Sale + Coins + Group Buy Four-Layer Price Calculation

An in-depth analysis of the `OrderService.checkOut` method in a NestJS project, demonstrating how to chain four layers of price calculation (flash sale, coupon, coins, group buy) and five subsystems within a Prisma transaction, covering optimistic lock debit, atomic inventory deduction, and a complete refund flow.

Backend Development

admin-next Coupon Marketing System — CouponList + CouponModal Form Linkage and Field Security Locking

In-depth analysis of the progress bar rendering in the coupon list, conditional field linkage in the form, field security locking strategy in edit mode, and bidirectional data converter pattern in the admin-next marketing module

Management Backend