In this code:

The transaction is started using _dbContext.Database.BeginTransaction().
The product is queried and locked for update using saveChanges().
The stock quantity is checked and updated within the transaction.
The transaction is committed after the order is created.
This ensures that the stock check and update are performed atomically, preventing race conditions.

Author: Nishant

src/Modules/SimplCommerce.Module.Orders/Services/OrderService.cs

@@ -24,7 +24,6 @@ namespace SimplCommerce.Module.Orders.Services
 {
     public class OrderService : IOrderService
     {
-        private readonly DbContext _dbContext;
         private readonly IRepository<Order> _orderRepository;
         private readonly ICouponService _couponService;
         private readonly IRepository<CheckoutItem> _checkoutItemRepository;
@@ -47,10 +46,8 @@ public OrderService(IRepository<Order> orderRepository,
             IShippingPriceService shippingPriceService,
             IRepository<UserAddress> userAddressRepository,
             IMediator mediator,
-            IProductPricingService productPricingService,
-            DbContext dbContext)
+            IProductPricingService productPricingService)
         {
-            _dbContext = dbContext;
             _orderRepository = orderRepository;
             _couponService = couponService;
             _checkoutItemRepository = checkoutItemRepository;