افزودن به سبد خرید» کجای پروژه باید انجام بشه؟ @DevTwitter

DevTwitter | توییت برنامه نویسی | United States America (US)

Create: 2025-06-28 Update: 2025-07-10 13:35:57

افزودن به سبد خرید» کجای پروژه باید انجام بشه؟

فرانت یا بک‌اند؟ یا هر دو؟

این سوال ظاهراً ساده، ولی پشتش معماری، UX و حتی امنیته.

گزینه اول: همه‌چی سمت فرانت (مثلاً فقط توی localStorage)

خوبه چون:
خیلی سریع اجرا می‌شه
کاربر حس "لگ" نمی‌گیره
ترافیک سرور هم کمتره

بدی‌هاش:
موجودی واقعی محصول چک نمی‌شه
سبد خرید بین دستگاه‌ها همگام نیست
قیمت‌ها ممکنه outdated باشن

گزینه دوم: هر بار تغییر → درخواست به بک‌اند

خوبه چون:
همه‌چیز همیشه دقیق و روی دیتابیسه
امکان تحلیل و گزارش‌گیری بهتره
ولی:
تجربه کاربری کند می‌شه
هر کلیک، یه درخواست جدید!

راه حل حرفه‌ای: ترکیب جفتش با Optimistic UI

- کاربر روی "Add to cart" کلیک می‌کنه
- آیتم فوراً توی UI نشون داده می‌شه (خوش‌بینانه)
- همزمان، یه درخواست async به بک‌اند می‌ره
- اگر خطا بود (مثلاً موجودی تموم شد)، تغییر UI برمی‌گرده

بک‌اند هم سبد رو توی دیتابیس ذخیره می‌کنه، موجودی و قیمت رو چک می‌کنه، و آماده تبدیل به سفارش نهایی هست

@DevTwitter | <Abolfazl Javadinia/>

DevTwitter | توییت برنامه نویسی

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DevTwitter | توییت برنامه نویسی

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