add new processor

internal/domains/product/entities/product.go

@@ -18,6 +18,8 @@ type Product struct {
 	Content     string          `gorm:"type:text" comment:"产品内容"`
 	CategoryID  string          `gorm:"type:varchar(36);not null" comment:"产品分类ID"`
 	Price       decimal.Decimal `gorm:"type:decimal(10,2);not null;default:0" comment:"产品价格"`
+	CostPrice   decimal.Decimal `gorm:"type:decimal(10,2);default:0" comment:"成本价"`
+	Remark      string          `gorm:"type:text" comment:"备注"`
 	IsEnabled   bool            `gorm:"default:true" comment:"是否启用"`
 	IsVisible   bool            `gorm:"default:true" comment:"是否展示"`
 	IsPackage   bool            `gorm:"default:false" comment:"是否组合包"`

internal/domains/product/services/product_management_service.go

@@ -290,6 +290,10 @@ func (s *ProductManagementService) ValidateProduct(product *entities.Product) er
 		return errors.New("产品价格不能为负数")
 	}
 
+	if product.CostPrice.IsNegative() {
+		return errors.New("成本价不能为负数")
+	}
+
 	// 验证分类是否存在
 	if product.CategoryID != "" {
 		category, err := s.categoryRepo.GetByID(context.Background(), product.CategoryID)