Adapt to old_id

internal/domains/product/services/product_management_service.go

@@ -105,6 +105,32 @@ func (s *ProductManagementService) GetProductWithCategory(ctx context.Context, p
 	return &product, nil
 }
 
+// GetProductByOldIDWithCategory 根据旧ID获取产品及其分类信息
+func (s *ProductManagementService) GetProductByOldIDWithCategory(ctx context.Context, oldID string) (*entities.Product, error) {
+	product, err := s.productRepo.FindByOldID(ctx, oldID)
+	if err != nil {
+		return nil, fmt.Errorf("产品不存在: %w", err)
+	}
+
+	// 加载分类信息
+	if product.CategoryID != "" {
+		category, err := s.categoryRepo.GetByID(ctx, product.CategoryID)
+		if err == nil {
+			product.Category = &category
+		}
+	}
+
+	// 如果是组合包，加载子产品信息
+	if product.IsPackage {
+		packageItems, err := s.productRepo.GetPackageItems(ctx, product.ID)
+		if err == nil {
+			product.PackageItems = packageItems
+		}
+	}
+
+	return product, nil
+}
+
 // GetPackageItems 获取组合包项目列表
 func (s *ProductManagementService) GetPackageItems(ctx context.Context, packageID string) ([]*entities.ProductPackageItem, error) {
 	packageItems, err := s.productRepo.GetPackageItems(ctx, packageID)