Adapt to old_id

internal/infrastructure/database/repositories/product/gorm_product_repository.go

@@ -66,6 +66,19 @@ func (r *GormProductRepository) FindByCode(ctx context.Context, code string) (*e
 	return &entity, nil
 }
 
+// FindByOldID 根据旧ID查找产品
+func (r *GormProductRepository) FindByOldID(ctx context.Context, oldID string) (*entities.Product, error) {
+	var entity entities.Product
+	err := r.GetDB(ctx).Where("old_id = ?", oldID).First(&entity).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, gorm.ErrRecordNotFound
+		}
+		return nil, err
+	}
+	return &entity, nil
+}
+
 // FindByCategoryID 根据分类ID查找产品
 func (r *GormProductRepository) FindByCategoryID(ctx context.Context, categoryID string) ([]*entities.Product, error) {
 	var productEntities []entities.Product