add f

internal/application/product/dto/commands/product_commands.go

@@ -2,17 +2,18 @@ package commands
 
 // CreateProductCommand 创建产品命令
 type CreateProductCommand struct {
-	Name        string  `json:"name" binding:"required,min=2,max=100" comment:"产品名称"`
+	Name          string  `json:"name" binding:"required,min=2,max=100" comment:"产品名称"`
-	Code        string  `json:"code" binding:"required,product_code" comment:"产品编号"`
+	Code          string  `json:"code" binding:"required,product_code" comment:"产品编号"`
-	Description string  `json:"description" binding:"omitempty,max=500" comment:"产品描述"`
+	Description   string  `json:"description" binding:"omitempty,max=500" comment:"产品描述"`
-	Content     string  `json:"content" binding:"omitempty,max=5000" comment:"产品内容"`
+	Content       string  `json:"content" binding:"omitempty,max=5000" comment:"产品内容"`
-	CategoryID  string  `json:"category_id" binding:"required,uuid" comment:"产品分类ID"`
+	CategoryID    string  `json:"category_id" binding:"required,uuid" comment:"一级分类ID"`
-	Price       float64 `json:"price" binding:"price,min=0" comment:"产品价格"`
+	SubCategoryID *string `json:"sub_category_id" binding:"omitempty,uuid" comment:"二级分类ID"`
-	CostPrice   float64 `json:"cost_price" binding:"omitempty,min=0" comment:"成本价"`
+	Price         float64 `json:"price" binding:"price,min=0" comment:"产品价格"`
-	Remark      string  `json:"remark" binding:"omitempty,max=1000" comment:"备注"`
+	CostPrice     float64 `json:"cost_price" binding:"omitempty,min=0" comment:"成本价"`
-	IsEnabled   bool    `json:"is_enabled" comment:"是否启用"`
+	Remark        string  `json:"remark" binding:"omitempty,max=1000" comment:"备注"`
-	IsVisible   bool    `json:"is_visible" comment:"是否展示"`
+	IsEnabled     bool    `json:"is_enabled" comment:"是否启用"`
-	IsPackage   bool    `json:"is_package" comment:"是否组合包"`
+	IsVisible     bool    `json:"is_visible" comment:"是否展示"`
+	IsPackage     bool    `json:"is_package" comment:"是否组合包"`
 
 	// UI组件相关字段
 	SellUIComponent  bool    `json:"sell_ui_component" comment:"是否出售UI组件"`
@@ -26,18 +27,19 @@ type CreateProductCommand struct {
 
 // UpdateProductCommand 更新产品命令
 type UpdateProductCommand struct {
-	ID          string  `json:"-" uri:"id" binding:"required,uuid" comment:"产品ID"`
+	ID            string  `json:"-" uri:"id" binding:"required,uuid" comment:"产品ID"`
-	Name        string  `json:"name" binding:"required,min=2,max=100" comment:"产品名称"`
+	Name          string  `json:"name" binding:"required,min=2,max=100" comment:"产品名称"`
-	Code        string  `json:"code" binding:"required,product_code" comment:"产品编号"`
+	Code          string  `json:"code" binding:"required,product_code" comment:"产品编号"`
-	Description string  `json:"description" binding:"omitempty,max=500" comment:"产品描述"`
+	Description   string  `json:"description" binding:"omitempty,max=500" comment:"产品描述"`
-	Content     string  `json:"content" binding:"omitempty,max=5000" comment:"产品内容"`
+	Content       string  `json:"content" binding:"omitempty,max=5000" comment:"产品内容"`
-	CategoryID  string  `json:"category_id" binding:"required,uuid" comment:"产品分类ID"`
+	CategoryID    string  `json:"category_id" binding:"required,uuid" comment:"一级分类ID"`
-	Price       float64 `json:"price" binding:"price,min=0" comment:"产品价格"`
+	SubCategoryID *string `json:"sub_category_id" binding:"omitempty,uuid" comment:"二级分类ID"`
-	CostPrice   float64 `json:"cost_price" binding:"omitempty,min=0" comment:"成本价"`
+	Price         float64 `json:"price" binding:"price,min=0" comment:"产品价格"`
-	Remark      string  `json:"remark" binding:"omitempty,max=1000" comment:"备注"`
+	CostPrice     float64 `json:"cost_price" binding:"omitempty,min=0" comment:"成本价"`
-	IsEnabled   bool    `json:"is_enabled" comment:"是否启用"`
+	Remark        string  `json:"remark" binding:"omitempty,max=1000" comment:"备注"`
-	IsVisible   bool    `json:"is_visible" comment:"是否展示"`
+	IsEnabled     bool    `json:"is_enabled" comment:"是否启用"`
-	IsPackage   bool    `json:"is_package" comment:"是否组合包"`
+	IsVisible     bool    `json:"is_visible" comment:"是否展示"`
+	IsPackage     bool    `json:"is_package" comment:"是否组合包"`
 
 	// UI组件相关字段
 	SellUIComponent  bool    `json:"sell_ui_component" comment:"是否出售UI组件"`

internal/application/product/dto/commands/sub_category_commands.go

@@ -0,0 +1,29 @@
+package commands
+
+// CreateSubCategoryCommand 创建二级分类命令
+type CreateSubCategoryCommand struct {
+	Name        string `json:"name" binding:"required,min=2,max=100" comment:"二级分类名称"`
+	Code        string `json:"code" binding:"required,min=2,max=50" comment:"二级分类编号"`
+	Description string `json:"description" binding:"omitempty,max=500" comment:"二级分类描述"`
+	CategoryID  string `json:"category_id" binding:"required,uuid" comment:"一级分类ID"`
+	Sort        int    `json:"sort" binding:"min=0" comment:"排序"`
+	IsEnabled   bool   `json:"is_enabled" comment:"是否启用"`
+	IsVisible   bool   `json:"is_visible" comment:"是否展示"`
+}
+
+// UpdateSubCategoryCommand 更新二级分类命令
+type UpdateSubCategoryCommand struct {
+	ID          string `json:"-" uri:"id" binding:"required,uuid" comment:"二级分类ID"`
+	Name        string `json:"name" binding:"required,min=2,max=100" comment:"二级分类名称"`
+	Code        string `json:"code" binding:"required,min=2,max=50" comment:"二级分类编号"`
+	Description string `json:"description" binding:"omitempty,max=500" comment:"二级分类描述"`
+	CategoryID  string `json:"category_id" binding:"required,uuid" comment:"一级分类ID"`
+	Sort        int    `json:"sort" binding:"min=0" comment:"排序"`
+	IsEnabled   bool   `json:"is_enabled" comment:"是否启用"`
+	IsVisible   bool   `json:"is_visible" comment:"是否展示"`
+}
+
+// DeleteSubCategoryCommand 删除二级分类命令
+type DeleteSubCategoryCommand struct {
+	ID string `json:"-" uri:"id" binding:"required,uuid" comment:"二级分类ID"`
+}

internal/application/product/dto/queries/sub_category_queries.go

@@ -0,0 +1,17 @@
+package queries
+
+// GetSubCategoryQuery 获取二级分类查询
+type GetSubCategoryQuery struct {
+	ID string `json:"id" form:"id" binding:"omitempty,uuid" comment:"二级分类ID"`
+}
+
+// ListSubCategoriesQuery 获取二级分类列表查询
+type ListSubCategoriesQuery struct {
+	Page       int    `json:"page" form:"page" binding:"min=1" comment:"页码"`
+	PageSize   int    `json:"page_size" form:"page_size" binding:"min=1,max=100" comment:"每页数量"`
+	CategoryID string `json:"category_id" form:"category_id" binding:"omitempty,uuid" comment:"一级分类ID"`
+	IsEnabled  *bool  `json:"is_enabled" form:"is_enabled" comment:"是否启用"`
+	IsVisible  *bool  `json:"is_visible" form:"is_visible" comment:"是否展示"`
+	SortBy     string `json:"sort_by" form:"sort_by" comment:"排序字段"`
+	SortOrder  string `json:"sort_order" form:"sort_order" comment:"排序方向"`
+}

internal/application/product/dto/responses/category_responses.go

@@ -4,23 +4,23 @@ import "time"
 
 // CategoryInfoResponse 分类详情响应
 type CategoryInfoResponse struct {
-	ID          string    `json:"id" comment:"分类ID"`
+	ID          string `json:"id" comment:"分类ID"`
-	Name        string    `json:"name" comment:"分类名称"`
+	Name        string `json:"name" comment:"分类名称"`
-	Code        string    `json:"code" comment:"分类编号"`
+	Code        string `json:"code" comment:"分类编号"`
-	Description string    `json:"description" comment:"分类描述"`
+	Description string `json:"description" comment:"分类描述"`
-	Sort        int       `json:"sort" comment:"排序"`
+	Sort        int    `json:"sort" comment:"排序"`
-	IsEnabled   bool      `json:"is_enabled" comment:"是否启用"`
+	IsEnabled   bool   `json:"is_enabled" comment:"是否启用"`
-	IsVisible   bool      `json:"is_visible" comment:"是否展示"`
+	IsVisible   bool   `json:"is_visible" comment:"是否展示"`
-	
+
 	CreatedAt time.Time `json:"created_at" comment:"创建时间"`
 	UpdatedAt time.Time `json:"updated_at" comment:"更新时间"`
 }
 
 // CategoryListResponse 分类列表响应
 type CategoryListResponse struct {
-	Total int64                `json:"total" comment:"总数"`
+	Total int64                  `json:"total" comment:"总数"`
-	Page  int                  `json:"page" comment:"页码"`
+	Page  int                    `json:"page" comment:"页码"`
-	Size  int                  `json:"size" comment:"每页数量"`
+	Size  int                    `json:"size" comment:"每页数量"`
 	Items []CategoryInfoResponse `json:"items" comment:"分类列表"`
 }
 
@@ -29,4 +29,38 @@ type CategorySimpleResponse struct {
 	ID   string `json:"id" comment:"分类ID"`
 	Name string `json:"name" comment:"分类名称"`
 	Code string `json:"code" comment:"分类编号"`
-} 
+}
+
+// SubCategoryInfoResponse 二级分类详情响应
+type SubCategoryInfoResponse struct {
+	ID          string `json:"id" comment:"二级分类ID"`
+	Name        string `json:"name" comment:"二级分类名称"`
+	Code        string `json:"code" comment:"二级分类编号"`
+	Description string `json:"description" comment:"二级分类描述"`
+	CategoryID  string `json:"category_id" comment:"一级分类ID"`
+	Sort        int    `json:"sort" comment:"排序"`
+	IsEnabled   bool   `json:"is_enabled" comment:"是否启用"`
+	IsVisible   bool   `json:"is_visible" comment:"是否展示"`
+
+	// 关联信息
+	Category *CategoryInfoResponse `json:"category,omitempty" comment:"一级分类信息"`
+
+	CreatedAt time.Time `json:"created_at" comment:"创建时间"`
+	UpdatedAt time.Time `json:"updated_at" comment:"更新时间"`
+}
+
+// SubCategoryListResponse 二级分类列表响应
+type SubCategoryListResponse struct {
+	Total int64                     `json:"total" comment:"总数"`
+	Page  int                       `json:"page" comment:"页码"`
+	Size  int                       `json:"size" comment:"每页数量"`
+	Items []SubCategoryInfoResponse `json:"items" comment:"二级分类列表"`
+}
+
+// SubCategorySimpleResponse 二级分类简单信息响应
+type SubCategorySimpleResponse struct {
+	ID         string `json:"id" comment:"二级分类ID"`
+	Name       string `json:"name" comment:"二级分类名称"`
+	Code       string `json:"code" comment:"二级分类编号"`
+	CategoryID string `json:"category_id" comment:"一级分类ID"`
+}

internal/application/product/dto/responses/product_responses.go

@@ -15,17 +15,18 @@ type PackageItemResponse struct {
 
 // ProductInfoResponse 产品详情响应
 type ProductInfoResponse struct {
-	ID           string  `json:"id" comment:"产品ID"`
+	ID            string  `json:"id" comment:"产品ID"`
-	OldID        *string `json:"old_id,omitempty" comment:"旧产品ID"`
+	OldID         *string `json:"old_id,omitempty" comment:"旧产品ID"`
-	Name         string  `json:"name" comment:"产品名称"`
+	Name          string  `json:"name" comment:"产品名称"`
-	Code         string  `json:"code" comment:"产品编号"`
+	Code          string  `json:"code" comment:"产品编号"`
-	Description  string  `json:"description" comment:"产品简介"`
+	Description   string  `json:"description" comment:"产品简介"`
-	Content      string  `json:"content" comment:"产品内容"`
+	Content       string  `json:"content" comment:"产品内容"`
-	CategoryID   string  `json:"category_id" comment:"产品分类ID"`
+	CategoryID    string  `json:"category_id" comment:"一级分类ID"`
-	Price        float64 `json:"price" comment:"产品价格"`
+	SubCategoryID *string `json:"sub_category_id,omitempty" comment:"二级分类ID"`
-	IsEnabled    bool    `json:"is_enabled" comment:"是否启用"`
+	Price         float64 `json:"price" comment:"产品价格"`
-	IsPackage    bool    `json:"is_package" comment:"是否组合包"`
+	IsEnabled     bool    `json:"is_enabled" comment:"是否启用"`
-	IsSubscribed *bool   `json:"is_subscribed,omitempty" comment:"当前用户是否已订阅"`
+	IsPackage     bool    `json:"is_package" comment:"是否组合包"`
+	IsSubscribed  *bool   `json:"is_subscribed,omitempty" comment:"当前用户是否已订阅"`
 	// UI组件相关字段
 	SellUIComponent  bool    `json:"sell_ui_component" comment:"是否出售UI组件"`
 	UIComponentPrice float64 `json:"ui_component_price" comment:"UI组件销售价格（组合包使用）"`
@@ -36,7 +37,8 @@ type ProductInfoResponse struct {
 	SEOKeywords    string `json:"seo_keywords" comment:"SEO关键词"`
 
 	// 关联信息
-	Category *CategoryInfoResponse `json:"category,omitempty" comment:"分类信息"`
+	Category    *CategoryInfoResponse    `json:"category,omitempty" comment:"一级分类信息"`
+	SubCategory *SubCategoryInfoResponse `json:"sub_category,omitempty" comment:"二级分类信息"`
 
 	// 组合包信息
 	PackageItems []*PackageItemResponse `json:"package_items,omitempty" comment:"组合包项目列表"`
@@ -91,19 +93,20 @@ type ProductStatsResponse struct {
 
 // ProductAdminInfoResponse 管理员产品详情响应
 type ProductAdminInfoResponse struct {
-	ID          string  `json:"id" comment:"产品ID"`
+	ID            string  `json:"id" comment:"产品ID"`
-	OldID       *string `json:"old_id,omitempty" comment:"旧产品ID"`
+	OldID         *string `json:"old_id,omitempty" comment:"旧产品ID"`
-	Name        string  `json:"name" comment:"产品名称"`
+	Name          string  `json:"name" comment:"产品名称"`
-	Code        string  `json:"code" comment:"产品编号"`
+	Code          string  `json:"code" comment:"产品编号"`
-	Description string  `json:"description" comment:"产品简介"`
+	Description   string  `json:"description" comment:"产品简介"`
-	Content     string  `json:"content" comment:"产品内容"`
+	Content       string  `json:"content" comment:"产品内容"`
-	CategoryID  string  `json:"category_id" comment:"产品分类ID"`
+	CategoryID    string  `json:"category_id" comment:"一级分类ID"`
-	Price       float64 `json:"price" comment:"产品价格"`
+	SubCategoryID *string `json:"sub_category_id,omitempty" comment:"二级分类ID"`
-	CostPrice   float64 `json:"cost_price" comment:"成本价"`
+	Price         float64 `json:"price" comment:"产品价格"`
-	Remark      string  `json:"remark" comment:"备注"`
+	CostPrice     float64 `json:"cost_price" comment:"成本价"`
-	IsEnabled   bool    `json:"is_enabled" comment:"是否启用"`
+	Remark        string  `json:"remark" comment:"备注"`
-	IsVisible   bool    `json:"is_visible" comment:"是否可见"`
+	IsEnabled     bool    `json:"is_enabled" comment:"是否启用"`
-	IsPackage   bool    `json:"is_package" comment:"是否组合包"`
+	IsVisible     bool    `json:"is_visible" comment:"是否可见"`
+	IsPackage     bool    `json:"is_package" comment:"是否组合包"`
 
 	// UI组件相关字段
 	SellUIComponent  bool    `json:"sell_ui_component" comment:"是否出售UI组件"`
@@ -115,7 +118,8 @@ type ProductAdminInfoResponse struct {
 	SEOKeywords    string `json:"seo_keywords" comment:"SEO关键词"`
 
 	// 关联信息
-	Category *CategoryInfoResponse `json:"category,omitempty" comment:"分类信息"`
+	Category    *CategoryInfoResponse    `json:"category,omitempty" comment:"一级分类信息"`
+	SubCategory *SubCategoryInfoResponse `json:"sub_category,omitempty" comment:"二级分类信息"`
 
 	// 组合包信息
 	PackageItems []*PackageItemResponse `json:"package_items,omitempty" comment:"组合包项目列表"`

internal/application/product/product_application_service_impl.go

@@ -50,7 +50,7 @@ func NewProductApplicationService(
 }
 
 // CreateProduct 创建产品
-// 业务流程<EFBFBD>?. 构建产品实体 2. 创建产品
+// 业务流程：1. 构建产品实体 2. 创建产品
 func (s *ProductApplicationServiceImpl) CreateProduct(ctx context.Context, cmd *commands.CreateProductCommand) (*responses.ProductAdminInfoResponse, error) {
 	// 1. 构建产品实体
 	product := &entities.Product{
@@ -59,6 +59,7 @@ func (s *ProductApplicationServiceImpl) CreateProduct(ctx context.Context, cmd *
 		Description:      cmd.Description,
 		Content:          cmd.Content,
 		CategoryID:       cmd.CategoryID,
+		SubCategoryID:    cmd.SubCategoryID,
 		Price:            decimal.NewFromFloat(cmd.Price),
 		CostPrice:        decimal.NewFromFloat(cmd.CostPrice),
 		Remark:           cmd.Remark,
@@ -97,6 +98,7 @@ func (s *ProductApplicationServiceImpl) UpdateProduct(ctx context.Context, cmd *
 	existingProduct.Description = cmd.Description
 	existingProduct.Content = cmd.Content
 	existingProduct.CategoryID = cmd.CategoryID
+	existingProduct.SubCategoryID = cmd.SubCategoryID
 	existingProduct.Price = decimal.NewFromFloat(cmd.Price)
 	existingProduct.CostPrice = decimal.NewFromFloat(cmd.CostPrice)
 	existingProduct.Remark = cmd.Remark
@@ -490,30 +492,36 @@ func (s *ProductApplicationServiceImpl) GetProductByIDForUser(ctx context.Contex
 // convertToProductInfoResponse 转换为产品信息响应
 func (s *ProductApplicationServiceImpl) convertToProductInfoResponse(product *entities.Product) *responses.ProductInfoResponse {
 	response := &responses.ProductInfoResponse{
-		ID:               product.ID,
+		ID:              product.ID,
-		OldID:            product.OldID,
+		OldID:           product.OldID,
-		Name:             product.Name,
+		Name:            product.Name,
-		Code:             product.Code,
+		Code:            product.Code,
-		Description:      product.Description,
+		Description:     product.Description,
-		Content:          product.Content,
+		Content:         product.Content,
-		CategoryID:       product.CategoryID,
+		CategoryID:      product.CategoryID,
-		Price:            product.Price.InexactFloat64(),
+		SubCategoryID:   product.SubCategoryID,
-		IsEnabled:        product.IsEnabled,
+		Price:           product.Price.InexactFloat64(),
-		IsPackage:        product.IsPackage,
+		IsEnabled:       product.IsEnabled,
-		SellUIComponent:  product.SellUIComponent,
+		IsPackage:       product.IsPackage,
+		SellUIComponent: product.SellUIComponent,
 		UIComponentPrice: product.UIComponentPrice.InexactFloat64(),
-		SEOTitle:         product.SEOTitle,
+		SEOTitle:        product.SEOTitle,
-		SEODescription:   product.SEODescription,
+		SEODescription:  product.SEODescription,
-		SEOKeywords:      product.SEOKeywords,
+		SEOKeywords:     product.SEOKeywords,
-		CreatedAt:        product.CreatedAt,
+		CreatedAt:       product.CreatedAt,
-		UpdatedAt:        product.UpdatedAt,
+		UpdatedAt:       product.UpdatedAt,
 	}
 
-	// 添加分类信息
+	// 添加一级分类信息
 	if product.Category != nil {
 		response.Category = s.convertToCategoryInfoResponse(product.Category)
 	}
 
+	// 添加二级分类信息
+	if product.SubCategory != nil {
+		response.SubCategory = s.convertToSubCategoryInfoResponse(product.SubCategory)
+	}
+
 	// 转换组合包项目信息
 	if product.IsPackage && len(product.PackageItems) > 0 {
 		response.PackageItems = make([]*responses.PackageItemResponse, len(product.PackageItems))
@@ -536,33 +544,39 @@ func (s *ProductApplicationServiceImpl) convertToProductInfoResponse(product *en
 // convertToProductAdminInfoResponse 转换为管理员产品信息响应
 func (s *ProductApplicationServiceImpl) convertToProductAdminInfoResponse(product *entities.Product) *responses.ProductAdminInfoResponse {
 	response := &responses.ProductAdminInfoResponse{
-		ID:               product.ID,
+		ID:              product.ID,
-		OldID:            product.OldID,
+		OldID:           product.OldID,
-		Name:             product.Name,
+		Name:            product.Name,
-		Code:             product.Code,
+		Code:            product.Code,
-		Description:      product.Description,
+		Description:     product.Description,
-		Content:          product.Content,
+		Content:         product.Content,
-		CategoryID:       product.CategoryID,
+		CategoryID:      product.CategoryID,
-		Price:            product.Price.InexactFloat64(),
+		SubCategoryID:   product.SubCategoryID,
-		CostPrice:        product.CostPrice.InexactFloat64(),
+		Price:           product.Price.InexactFloat64(),
-		Remark:           product.Remark,
+		CostPrice:       product.CostPrice.InexactFloat64(),
-		IsEnabled:        product.IsEnabled,
+		Remark:          product.Remark,
-		IsVisible:        product.IsVisible, // 管理员可以看到可见状态
+		IsEnabled:       product.IsEnabled,
-		IsPackage:        product.IsPackage,
+		IsVisible:       product.IsVisible, // 管理员可以看到可见状态
-		SellUIComponent:  product.SellUIComponent,
+		IsPackage:       product.IsPackage,
+		SellUIComponent: product.SellUIComponent,
 		UIComponentPrice: product.UIComponentPrice.InexactFloat64(),
-		SEOTitle:         product.SEOTitle,
+		SEOTitle:        product.SEOTitle,
-		SEODescription:   product.SEODescription,
+		SEODescription:  product.SEODescription,
-		SEOKeywords:      product.SEOKeywords,
+		SEOKeywords:     product.SEOKeywords,
-		CreatedAt:        product.CreatedAt,
+		CreatedAt:       product.CreatedAt,
-		UpdatedAt:        product.UpdatedAt,
+		UpdatedAt:       product.UpdatedAt,
 	}
 
-	// 添加分类信息
+	// 添加一级分类信息
 	if product.Category != nil {
 		response.Category = s.convertToCategoryInfoResponse(product.Category)
 	}
 
+	// 添加二级分类信息
+	if product.SubCategory != nil {
+		response.SubCategory = s.convertToSubCategoryInfoResponse(product.SubCategory)
+	}
+
 	// 转换组合包项目信息
 	if product.IsPackage && len(product.PackageItems) > 0 {
 		response.PackageItems = make([]*responses.PackageItemResponse, len(product.PackageItems))
@@ -594,6 +608,28 @@ func (s *ProductApplicationServiceImpl) convertToCategoryInfoResponse(category *
 	}
 }
 
+func (s *ProductApplicationServiceImpl) convertToSubCategoryInfoResponse(subCategory *entities.ProductSubCategory) *responses.SubCategoryInfoResponse {
+	response := &responses.SubCategoryInfoResponse{
+		ID:          subCategory.ID,
+		Name:        subCategory.Name,
+		Code:        subCategory.Code,
+		Description: subCategory.Description,
+		CategoryID:  subCategory.CategoryID,
+		Sort:        subCategory.Sort,
+		IsEnabled:   subCategory.IsEnabled,
+		IsVisible:   subCategory.IsVisible,
+		CreatedAt:   subCategory.CreatedAt,
+		UpdatedAt:   subCategory.UpdatedAt,
+	}
+
+	// 添加一级分类信息
+	if subCategory.Category != nil {
+		response.Category = s.convertToCategoryInfoResponse(subCategory.Category)
+	}
+
+	return response
+}
+
 // GetProductApiConfig 获取产品API配置
 func (s *ProductApplicationServiceImpl) GetProductApiConfig(ctx context.Context, productID string) (*responses.ProductApiConfigResponse, error) {
 	return s.productApiConfigAppService.GetProductApiConfig(ctx, productID)

internal/application/product/sub_category_application_service.go

@@ -0,0 +1,20 @@
+package product
+
+import (
+	"context"
+	"tyapi-server/internal/application/product/dto/commands"
+	"tyapi-server/internal/application/product/dto/queries"
+	"tyapi-server/internal/application/product/dto/responses"
+)
+
+// SubCategoryApplicationService 二级分类应用服务接口
+type SubCategoryApplicationService interface {
+	// 二级分类管理
+	CreateSubCategory(ctx context.Context, cmd *commands.CreateSubCategoryCommand) error
+	UpdateSubCategory(ctx context.Context, cmd *commands.UpdateSubCategoryCommand) error
+	DeleteSubCategory(ctx context.Context, cmd *commands.DeleteSubCategoryCommand) error
+
+	GetSubCategoryByID(ctx context.Context, query *queries.GetSubCategoryQuery) (*responses.SubCategoryInfoResponse, error)
+	ListSubCategories(ctx context.Context, query *queries.ListSubCategoriesQuery) (*responses.SubCategoryListResponse, error)
+	ListSubCategoriesByCategoryID(ctx context.Context, categoryID string) ([]*responses.SubCategorySimpleResponse, error)
+}

internal/application/product/sub_category_application_service_impl.go

@@ -0,0 +1,322 @@
+package product
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"tyapi-server/internal/application/product/dto/commands"
+	"tyapi-server/internal/application/product/dto/queries"
+	"tyapi-server/internal/application/product/dto/responses"
+	"tyapi-server/internal/domains/product/entities"
+	"tyapi-server/internal/domains/product/repositories"
+
+	"go.uber.org/zap"
+)
+
+// SubCategoryApplicationServiceImpl 二级分类应用服务实现
+type SubCategoryApplicationServiceImpl struct {
+	categoryRepo    repositories.ProductCategoryRepository
+	subCategoryRepo repositories.ProductSubCategoryRepository
+	logger          *zap.Logger
+}
+
+// NewSubCategoryApplicationService 创建二级分类应用服务
+func NewSubCategoryApplicationService(
+	categoryRepo repositories.ProductCategoryRepository,
+	subCategoryRepo repositories.ProductSubCategoryRepository,
+	logger *zap.Logger,
+) SubCategoryApplicationService {
+	return &SubCategoryApplicationServiceImpl{
+		categoryRepo:    categoryRepo,
+		subCategoryRepo: subCategoryRepo,
+		logger:          logger,
+	}
+}
+
+// CreateSubCategory 创建二级分类
+func (s *SubCategoryApplicationServiceImpl) CreateSubCategory(ctx context.Context, cmd *commands.CreateSubCategoryCommand) error {
+	// 1. 参数验证
+	if err := s.validateCreateSubCategory(cmd); err != nil {
+		return err
+	}
+
+	// 2. 验证一级分类是否存在
+	category, err := s.categoryRepo.GetByID(ctx, cmd.CategoryID)
+	if err != nil {
+		return fmt.Errorf("一级分类不存在: %w", err)
+	}
+	if !category.IsValid() {
+		return errors.New("一级分类已禁用或删除")
+	}
+
+	// 3. 验证二级分类编号唯一性
+	if err := s.validateSubCategoryCode(cmd.Code, "", cmd.CategoryID); err != nil {
+		return err
+	}
+
+	// 4. 创建二级分类实体
+	subCategory := &entities.ProductSubCategory{
+		Name:        cmd.Name,
+		Code:        cmd.Code,
+		Description: cmd.Description,
+		CategoryID:  cmd.CategoryID,
+		Sort:        cmd.Sort,
+		IsEnabled:   cmd.IsEnabled,
+		IsVisible:   cmd.IsVisible,
+	}
+
+	// 5. 保存到仓储
+	createdSubCategory, err := s.subCategoryRepo.Create(ctx, *subCategory)
+	if err != nil {
+		s.logger.Error("创建二级分类失败", zap.Error(err), zap.String("code", cmd.Code))
+		return fmt.Errorf("创建二级分类失败: %w", err)
+	}
+
+	s.logger.Info("创建二级分类成功", zap.String("id", createdSubCategory.ID), zap.String("code", cmd.Code))
+	return nil
+}
+
+// UpdateSubCategory 更新二级分类
+func (s *SubCategoryApplicationServiceImpl) UpdateSubCategory(ctx context.Context, cmd *commands.UpdateSubCategoryCommand) error {
+	// 1. 参数验证
+	if err := s.validateUpdateSubCategory(cmd); err != nil {
+		return err
+	}
+
+	// 2. 获取现有二级分类
+	existingSubCategory, err := s.subCategoryRepo.GetByID(ctx, cmd.ID)
+	if err != nil {
+		return fmt.Errorf("二级分类不存在: %w", err)
+	}
+
+	// 3. 验证一级分类是否存在
+	category, err := s.categoryRepo.GetByID(ctx, cmd.CategoryID)
+	if err != nil {
+		return fmt.Errorf("一级分类不存在: %w", err)
+	}
+	if !category.IsValid() {
+		return errors.New("一级分类已禁用或删除")
+	}
+
+	// 4. 验证二级分类编号唯一性（排除当前分类）
+	if err := s.validateSubCategoryCode(cmd.Code, cmd.ID, cmd.CategoryID); err != nil {
+		return err
+	}
+
+	// 5. 更新二级分类信息
+	existingSubCategory.Name = cmd.Name
+	existingSubCategory.Code = cmd.Code
+	existingSubCategory.Description = cmd.Description
+	existingSubCategory.CategoryID = cmd.CategoryID
+	existingSubCategory.Sort = cmd.Sort
+	existingSubCategory.IsEnabled = cmd.IsEnabled
+	existingSubCategory.IsVisible = cmd.IsVisible
+
+	// 6. 保存到仓储
+	if err := s.subCategoryRepo.Update(ctx, *existingSubCategory); err != nil {
+		s.logger.Error("更新二级分类失败", zap.Error(err), zap.String("id", cmd.ID))
+		return fmt.Errorf("更新二级分类失败: %w", err)
+	}
+
+	s.logger.Info("更新二级分类成功", zap.String("id", cmd.ID), zap.String("code", cmd.Code))
+	return nil
+}
+
+// DeleteSubCategory 删除二级分类
+func (s *SubCategoryApplicationServiceImpl) DeleteSubCategory(ctx context.Context, cmd *commands.DeleteSubCategoryCommand) error {
+	// 1. 检查二级分类是否存在
+	existingSubCategory, err := s.subCategoryRepo.GetByID(ctx, cmd.ID)
+	if err != nil {
+		return fmt.Errorf("二级分类不存在: %w", err)
+	}
+
+	// 2. 删除二级分类
+	if err := s.subCategoryRepo.Delete(ctx, cmd.ID); err != nil {
+		s.logger.Error("删除二级分类失败", zap.Error(err), zap.String("id", cmd.ID))
+		return fmt.Errorf("删除二级分类失败: %w", err)
+	}
+
+	s.logger.Info("删除二级分类成功", zap.String("id", cmd.ID), zap.String("code", existingSubCategory.Code))
+	return nil
+}
+
+// GetSubCategoryByID 根据ID获取二级分类
+func (s *SubCategoryApplicationServiceImpl) GetSubCategoryByID(ctx context.Context, query *queries.GetSubCategoryQuery) (*responses.SubCategoryInfoResponse, error) {
+	subCategory, err := s.subCategoryRepo.GetByID(ctx, query.ID)
+	if err != nil {
+		return nil, fmt.Errorf("二级分类不存在: %w", err)
+	}
+
+	// 加载一级分类信息
+	if subCategory.CategoryID != "" {
+		category, err := s.categoryRepo.GetByID(ctx, subCategory.CategoryID)
+		if err == nil {
+			subCategory.Category = &category
+		}
+	}
+
+	// 转换为响应对象
+	response := s.convertToSubCategoryInfoResponse(subCategory)
+	return response, nil
+}
+
+// ListSubCategories 获取二级分类列表
+func (s *SubCategoryApplicationServiceImpl) ListSubCategories(ctx context.Context, query *queries.ListSubCategoriesQuery) (*responses.SubCategoryListResponse, error) {
+	// 构建查询条件
+	categoryID := query.CategoryID
+	isEnabled := query.IsEnabled
+	isVisible := query.IsVisible
+
+	var subCategories []*entities.ProductSubCategory
+	var err error
+
+	// 根据条件查询
+	if categoryID != "" {
+		// 按一级分类查询
+		subCategories, err = s.subCategoryRepo.FindByCategoryID(ctx, categoryID)
+	} else {
+		// 查询所有二级分类
+		subCategories, err = s.subCategoryRepo.List(ctx)
+	}
+
+	if err != nil {
+		s.logger.Error("获取二级分类列表失败", zap.Error(err))
+		return nil, fmt.Errorf("获取二级分类列表失败: %w", err)
+	}
+
+	// 过滤状态
+	filteredSubCategories := make([]*entities.ProductSubCategory, 0)
+	for _, subCategory := range subCategories {
+		if isEnabled != nil && *isEnabled != subCategory.IsEnabled {
+			continue
+		}
+		if isVisible != nil && *isVisible != subCategory.IsVisible {
+			continue
+		}
+		filteredSubCategories = append(filteredSubCategories, subCategory)
+	}
+
+	// 加载一级分类信息
+	for _, subCategory := range filteredSubCategories {
+		if subCategory.CategoryID != "" {
+			category, err := s.categoryRepo.GetByID(ctx, subCategory.CategoryID)
+			if err == nil {
+				subCategory.Category = &category
+			}
+		}
+	}
+
+	// 转换为响应对象
+	items := make([]responses.SubCategoryInfoResponse, len(filteredSubCategories))
+	for i, subCategory := range filteredSubCategories {
+		items[i] = *s.convertToSubCategoryInfoResponse(subCategory)
+	}
+
+	return &responses.SubCategoryListResponse{
+		Total: int64(len(items)),
+		Page:  query.Page,
+		Size:  query.PageSize,
+		Items: items,
+	}, nil
+}
+
+// ListSubCategoriesByCategoryID 根据一级分类ID获取二级分类列表
+func (s *SubCategoryApplicationServiceImpl) ListSubCategoriesByCategoryID(ctx context.Context, categoryID string) ([]*responses.SubCategorySimpleResponse, error) {
+	subCategories, err := s.subCategoryRepo.FindByCategoryID(ctx, categoryID)
+	if err != nil {
+		return nil, fmt.Errorf("获取二级分类列表失败: %w", err)
+	}
+
+	// 转换为响应对象
+	items := make([]*responses.SubCategorySimpleResponse, len(subCategories))
+	for i, subCategory := range subCategories {
+		items[i] = &responses.SubCategorySimpleResponse{
+			ID:         subCategory.ID,
+			Name:       subCategory.Name,
+			Code:       subCategory.Code,
+			CategoryID: subCategory.CategoryID,
+		}
+	}
+
+	return items, nil
+}
+
+// convertToSubCategoryInfoResponse 转换为二级分类信息响应
+func (s *SubCategoryApplicationServiceImpl) convertToSubCategoryInfoResponse(subCategory *entities.ProductSubCategory) *responses.SubCategoryInfoResponse {
+	response := &responses.SubCategoryInfoResponse{
+		ID:          subCategory.ID,
+		Name:        subCategory.Name,
+		Code:        subCategory.Code,
+		Description: subCategory.Description,
+		CategoryID:  subCategory.CategoryID,
+		Sort:        subCategory.Sort,
+		IsEnabled:   subCategory.IsEnabled,
+		IsVisible:   subCategory.IsVisible,
+		CreatedAt:   subCategory.CreatedAt,
+		UpdatedAt:   subCategory.UpdatedAt,
+	}
+
+	// 添加一级分类信息
+	if subCategory.Category != nil {
+		response.Category = &responses.CategoryInfoResponse{
+			ID:          subCategory.Category.ID,
+			Name:        subCategory.Category.Name,
+			Description: subCategory.Category.Description,
+			Sort:        subCategory.Category.Sort,
+			IsEnabled:   subCategory.Category.IsEnabled,
+			IsVisible:   subCategory.Category.IsVisible,
+			CreatedAt:   subCategory.Category.CreatedAt,
+			UpdatedAt:   subCategory.Category.UpdatedAt,
+		}
+	}
+
+	return response
+}
+
+// validateCreateSubCategory 验证创建二级分类参数
+func (s *SubCategoryApplicationServiceImpl) validateCreateSubCategory(cmd *commands.CreateSubCategoryCommand) error {
+	if cmd.Name == "" {
+		return errors.New("二级分类名称不能为空")
+	}
+	if cmd.Code == "" {
+		return errors.New("二级分类编号不能为空")
+	}
+	if cmd.CategoryID == "" {
+		return errors.New("一级分类ID不能为空")
+	}
+	return nil
+}
+
+// validateUpdateSubCategory 验证更新二级分类参数
+func (s *SubCategoryApplicationServiceImpl) validateUpdateSubCategory(cmd *commands.UpdateSubCategoryCommand) error {
+	if cmd.ID == "" {
+		return errors.New("二级分类ID不能为空")
+	}
+	if cmd.Name == "" {
+		return errors.New("二级分类名称不能为空")
+	}
+	if cmd.Code == "" {
+		return errors.New("二级分类编号不能为空")
+	}
+	if cmd.CategoryID == "" {
+		return errors.New("一级分类ID不能为空")
+	}
+	return nil
+}
+
+// validateSubCategoryCode 验证二级分类编号唯一性
+func (s *SubCategoryApplicationServiceImpl) validateSubCategoryCode(code, excludeID, categoryID string) error {
+	if code == "" {
+		return errors.New("二级分类编号不能为空")
+	}
+
+	existingSubCategory, err := s.subCategoryRepo.FindByCode(context.Background(), code)
+	if err == nil && existingSubCategory != nil && existingSubCategory.ID != excludeID {
+		// 如果指定了分类ID，检查是否在同一分类下
+		if categoryID == "" || existingSubCategory.CategoryID == categoryID {
+			return errors.New("二级分类编号已存在")
+		}
+	}
+
+	return nil
+}

internal/container/container.go

@@ -557,6 +557,11 @@ func NewContainer() *Container {
 				product_repo.NewGormProductCategoryRepository,
 				fx.As(new(domain_product_repo.ProductCategoryRepository)),
 			),
+			// 产品二级分类仓储 - 同时注册具体类型和接口类型
+			fx.Annotate(
+				product_repo.NewGormProductSubCategoryRepository,
+				fx.As(new(domain_product_repo.ProductSubCategoryRepository)),
+			),
 			// 订阅仓储 - 同时注册具体类型和接口类型
 			fx.Annotate(
 				product_repo.NewGormSubscriptionRepository,
@@ -1002,6 +1007,11 @@ func NewContainer() *Container {
 				product.NewCategoryApplicationService,
 				fx.As(new(product.CategoryApplicationService)),
 			),
+			// 二级分类应用服务 - 绑定到接口
+			fx.Annotate(
+				product.NewSubCategoryApplicationService,
+				fx.As(new(product.SubCategoryApplicationService)),
+			),
 			fx.Annotate(
 				product.NewDocumentationApplicationService,
 				fx.As(new(product.DocumentationApplicationServiceInterface)),
@@ -1198,6 +1208,8 @@ func NewContainer() *Container {
 			handlers.NewProductHandler,
 			// 产品管理员HTTP处理器
 			handlers.NewProductAdminHandler,
+			// 二级分类HTTP处理器
+			handlers.NewSubCategoryHandler,
 			// API Handler
 			handlers.NewApiHandler,
 			// 统计HTTP处理器
@@ -1266,6 +1278,8 @@ func NewContainer() *Container {
 			routes.NewProductRoutes,
 			// 产品管理员路由
 			routes.NewProductAdminRoutes,
+			// 二级分类路由
+			routes.NewSubCategoryRoutes,
 			// 组件报告订单路由
 			routes.NewComponentReportOrderRoutes,
 			// UI组件路由
@@ -1384,6 +1398,7 @@ func RegisterRoutes(
 	financeRoutes *routes.FinanceRoutes,
 	productRoutes *routes.ProductRoutes,
 	productAdminRoutes *routes.ProductAdminRoutes,
+	subCategoryRoutes *routes.SubCategoryRoutes,
 	componentReportOrderRoutes *routes.ComponentReportOrderRoutes,
 	uiComponentRoutes *routes.UIComponentRoutes,
 	articleRoutes *routes.ArticleRoutes,
@@ -1406,6 +1421,7 @@ func RegisterRoutes(
 	financeRoutes.Register(router)
 	productRoutes.Register(router)
 	productAdminRoutes.Register(router)
+	subCategoryRoutes.Register(router)
 	componentReportOrderRoutes.Register(router)
 	uiComponentRoutes.Register(router)
 

internal/domains/product/entities/product.go

@@ -10,19 +10,20 @@ import (
 
 // Product 产品实体
 type Product struct {
-	ID          string          `gorm:"primaryKey;type:varchar(36)" comment:"产品ID"`
+	ID            string          `gorm:"primaryKey;type:varchar(36)" comment:"产品ID"`
-	OldID       *string         `gorm:"type:varchar(36);index" comment:"旧产品ID，用于兼容"`
+	OldID         *string         `gorm:"type:varchar(36);index" comment:"旧产品ID，用于兼容"`
-	Name        string          `gorm:"type:varchar(100);not null" comment:"产品名称"`
+	Name          string          `gorm:"type:varchar(100);not null" comment:"产品名称"`
-	Code        string          `gorm:"type:varchar(50);uniqueIndex;not null" comment:"产品编号"`
+	Code          string          `gorm:"type:varchar(50);uniqueIndex;not null" comment:"产品编号"`
-	Description string          `gorm:"type:text" comment:"产品简介"`
+	Description   string          `gorm:"type:text" comment:"产品简介"`
-	Content     string          `gorm:"type:text" comment:"产品内容"`
+	Content       string          `gorm:"type:text" comment:"产品内容"`
-	CategoryID  string          `gorm:"type:varchar(36);not null" comment:"产品分类ID"`
+	CategoryID    string          `gorm:"type:varchar(36);not null" comment:"一级分类ID"`
-	Price       decimal.Decimal `gorm:"type:decimal(10,2);not null;default:0" comment:"产品价格"`
+	SubCategoryID *string         `gorm:"type:varchar(36);index" comment:"二级分类ID"`
-	CostPrice   decimal.Decimal `gorm:"type:decimal(10,2);default:0" comment:"成本价"`
+	Price         decimal.Decimal `gorm:"type:decimal(10,2);not null;default:0" comment:"产品价格"`
-	Remark      string          `gorm:"type:text" comment:"备注"`
+	CostPrice     decimal.Decimal `gorm:"type:decimal(10,2);default:0" comment:"成本价"`
-	IsEnabled   bool            `gorm:"default:false" comment:"是否启用"`
+	Remark        string          `gorm:"type:text" comment:"备注"`
-	IsVisible   bool            `gorm:"default:false" comment:"是否展示"`
+	IsEnabled     bool            `gorm:"default:false" comment:"是否启用"`
-	IsPackage   bool            `gorm:"default:false" comment:"是否组合包"`
+	IsVisible     bool            `gorm:"default:false" comment:"是否展示"`
+	IsPackage     bool            `gorm:"default:false" comment:"是否组合包"`
 	// 组合包相关关联
 	PackageItems []*ProductPackageItem `gorm:"foreignKey:PackageID" comment:"组合包项目列表"`
 	// UI组件相关字段
@@ -34,7 +35,8 @@ type Product struct {
 	SEOKeywords    string `gorm:"type:text" comment:"SEO关键词"`
 
 	// 关联关系
-	Category      *ProductCategory      `gorm:"foreignKey:CategoryID" comment:"产品分类"`
+	Category      *ProductCategory      `gorm:"foreignKey:CategoryID" comment:"一级分类"`
+	SubCategory   *ProductSubCategory   `gorm:"foreignKey:SubCategoryID" comment:"二级分类"`
 	Documentation *ProductDocumentation `gorm:"foreignKey:ProductID" comment:"产品文档"`
 
 	CreatedAt time.Time      `gorm:"autoCreateTime" comment:"创建时间"`
@@ -118,3 +120,34 @@ func (p *Product) GetOldID() string {
 func (p *Product) HasOldID() bool {
 	return p.OldID != nil && *p.OldID != ""
 }
+
+// HasSubCategory 检查是否有二级分类
+func (p *Product) HasSubCategory() bool {
+	return p.SubCategoryID != nil && *p.SubCategoryID != ""
+}
+
+// GetFullCategoryPath 获取完整分类路径（一级分类/二级分类）
+func (p *Product) GetFullCategoryPath() string {
+	if p.Category == nil {
+		return ""
+	}
+
+	if p.SubCategory != nil {
+		return p.Category.Name + " / " + p.SubCategory.Name
+	}
+
+	return p.Category.Name
+}
+
+// GetFullCategoryCode 获取完整分类编号（一级分类编号.二级分类编号）
+func (p *Product) GetFullCategoryCode() string {
+	if p.Category == nil {
+		return ""
+	}
+
+	if p.SubCategory != nil {
+		return p.Category.Code + "." + p.SubCategory.Code
+	}
+
+	return p.Category.Code
+}

internal/domains/product/entities/product_category.go

@@ -18,7 +18,8 @@ type ProductCategory struct {
 	IsVisible   bool   `gorm:"default:true" comment:"是否展示"`
 
 	// 关联关系
-	Products []Product `gorm:"foreignKey:CategoryID" comment:"产品列表"`
+	Products      []Product            `gorm:"foreignKey:CategoryID" comment:"产品列表"`
+	SubCategories []ProductSubCategory `gorm:"foreignKey:CategoryID" comment:"二级分类列表"`
 
 	CreatedAt time.Time      `gorm:"autoCreateTime" comment:"创建时间"`
 	UpdatedAt time.Time      `gorm:"autoUpdateTime" comment:"更新时间"`

internal/domains/product/entities/product_sub_category.go

@@ -0,0 +1,82 @@
+package entities
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// ProductSubCategory 产品二级分类实体
+type ProductSubCategory struct {
+	ID          string `gorm:"primaryKey;type:varchar(36)" comment:"二级分类ID"`
+	Name        string `gorm:"type:varchar(100);not null" comment:"二级分类名称"`
+	Code        string `gorm:"type:varchar(50);uniqueIndex;not null" comment:"二级分类编号"`
+	Description string `gorm:"type:text" comment:"二级分类描述"`
+	CategoryID  string `gorm:"type:varchar(36);not null;index" comment:"一级分类ID"`
+	Sort        int    `gorm:"default:0" comment:"排序"`
+	IsEnabled   bool   `gorm:"default:true" comment:"是否启用"`
+	IsVisible   bool   `gorm:"default:true" comment:"是否展示"`
+
+	// 关联关系
+	Category *ProductCategory `gorm:"foreignKey:CategoryID" comment:"一级分类"`
+	Products []Product        `gorm:"foreignKey:SubCategoryID" comment:"产品列表"`
+
+	CreatedAt time.Time      `gorm:"autoCreateTime" comment:"创建时间"`
+	UpdatedAt time.Time      `gorm:"autoUpdateTime" comment:"更新时间"`
+	DeletedAt gorm.DeletedAt `gorm:"index" comment:"软删除时间"`
+}
+
+// BeforeCreate GORM钩子：创建前自动生成UUID
+func (psc *ProductSubCategory) BeforeCreate(tx *gorm.DB) error {
+	if psc.ID == "" {
+		psc.ID = uuid.New().String()
+	}
+	return nil
+}
+
+// IsValid 检查二级分类是否有效
+func (psc *ProductSubCategory) IsValid() bool {
+	return psc.DeletedAt.Time.IsZero() && psc.IsEnabled
+}
+
+// IsVisibleToUser 检查二级分类是否对用户可见
+func (psc *ProductSubCategory) IsVisibleToUser() bool {
+	return psc.IsValid() && psc.IsVisible
+}
+
+// Enable 启用二级分类
+func (psc *ProductSubCategory) Enable() {
+	psc.IsEnabled = true
+}
+
+// Disable 禁用二级分类
+func (psc *ProductSubCategory) Disable() {
+	psc.IsEnabled = false
+}
+
+// Show 显示二级分类
+func (psc *ProductSubCategory) Show() {
+	psc.IsVisible = true
+}
+
+// Hide 隐藏二级分类
+func (psc *ProductSubCategory) Hide() {
+	psc.IsVisible = false
+}
+
+// GetFullPath 获取完整路径（一级分类/二级分类）
+func (psc *ProductSubCategory) GetFullPath() string {
+	if psc.Category != nil {
+		return psc.Category.Name + " / " + psc.Name
+	}
+	return psc.Name
+}
+
+// GetFullCode 获取完整编号（一级分类编号.二级分类编号）
+func (psc *ProductSubCategory) GetFullCode() string {
+	if psc.Category != nil {
+		return psc.Category.Code + "." + psc.Code
+	}
+	return psc.Code
+}

internal/domains/product/repositories/product_sub_category_repository_interface.go

@@ -0,0 +1,22 @@
+package repositories
+
+import (
+	"context"
+	"tyapi-server/internal/domains/product/entities"
+)
+
+// ProductSubCategoryRepository 产品二级分类仓储接口
+type ProductSubCategoryRepository interface {
+	// 基础CRUD方法
+	GetByID(ctx context.Context, id string) (*entities.ProductSubCategory, error)
+	Create(ctx context.Context, category entities.ProductSubCategory) (*entities.ProductSubCategory, error)
+	Update(ctx context.Context, category entities.ProductSubCategory) error
+	Delete(ctx context.Context, id string) error
+	List(ctx context.Context) ([]*entities.ProductSubCategory, error)
+
+	// 查询方法
+	FindByCode(ctx context.Context, code string) (*entities.ProductSubCategory, error)
+	FindByCategoryID(ctx context.Context, categoryID string) ([]*entities.ProductSubCategory, error)
+	FindVisible(ctx context.Context) ([]*entities.ProductSubCategory, error)
+	FindEnabled(ctx context.Context) ([]*entities.ProductSubCategory, error)
+}

internal/domains/product/services/product_management_service.go

@@ -18,21 +18,24 @@ import (
 // ProductManagementService 产品管理领域服务
 // 负责产品的基本管理操作，包括创建、查询、更新等
 type ProductManagementService struct {
-	productRepo  repositories.ProductRepository
+	productRepo     repositories.ProductRepository
-	categoryRepo repositories.ProductCategoryRepository
+	categoryRepo    repositories.ProductCategoryRepository
-	logger       *zap.Logger
+	subCategoryRepo repositories.ProductSubCategoryRepository
+	logger          *zap.Logger
 }
 
 // NewProductManagementService 创建产品管理领域服务
 func NewProductManagementService(
 	productRepo repositories.ProductRepository,
 	categoryRepo repositories.ProductCategoryRepository,
+	subCategoryRepo repositories.ProductSubCategoryRepository,
 	logger *zap.Logger,
 ) *ProductManagementService {
 	return &ProductManagementService{
-		productRepo:  productRepo,
+		productRepo:     productRepo,
-		categoryRepo: categoryRepo,
+		categoryRepo:    categoryRepo,
-		logger:       logger,
+		subCategoryRepo: subCategoryRepo,
+		logger:          logger,
 	}
 }
 
@@ -306,6 +309,21 @@ func (s *ProductManagementService) ValidateProduct(product *entities.Product) er
 		}
 	}
 
+	// 验证二级分类是否存在（如果设置了二级分类）
+	if product.SubCategoryID != nil && *product.SubCategoryID != "" {
+		subCategory, err := s.subCategoryRepo.GetByID(context.Background(), *product.SubCategoryID)
+		if err != nil {
+			return fmt.Errorf("产品二级分类不存在: %w", err)
+		}
+		if !subCategory.IsValid() {
+			return errors.New("产品二级分类已禁用或删除")
+		}
+		// 验证二级分类是否属于指定的一级分类
+		if subCategory.CategoryID != product.CategoryID {
+			return errors.New("二级分类不属于指定的一级分类")
+		}
+	}
+
 	return nil
 }
 

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

@@ -116,7 +116,7 @@ func (r *GormComponentReportRepository) GetUserDownloadedProductCodes(ctx contex
 
 func (r *GormComponentReportRepository) GetDownloadByPaymentOrderID(ctx context.Context, orderID string) (*entities.ComponentReportDownload, error) {
 	var download entities.ComponentReportDownload
-	err := r.GetDB(ctx).Where("order_number = ?", orderID).First(&download).Error
+	err := r.GetDB(ctx).Where("order_id = ?", orderID).First(&download).Error
 	if err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, gorm.ErrRecordNotFound

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

@@ -0,0 +1,137 @@
+package repositories
+
+import (
+	"context"
+	"errors"
+	"tyapi-server/internal/domains/product/entities"
+	"tyapi-server/internal/domains/product/repositories"
+	"tyapi-server/internal/shared/database"
+
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+)
+
+const (
+	ProductSubCategoriesTable = "product_sub_categories"
+)
+
+type GormProductSubCategoryRepository struct {
+	*database.CachedBaseRepositoryImpl
+}
+
+var _ repositories.ProductSubCategoryRepository = (*GormProductSubCategoryRepository)(nil)
+
+func NewGormProductSubCategoryRepository(db *gorm.DB, logger *zap.Logger) repositories.ProductSubCategoryRepository {
+	return &GormProductSubCategoryRepository{
+		CachedBaseRepositoryImpl: database.NewCachedBaseRepositoryImpl(db, logger, ProductSubCategoriesTable),
+	}
+}
+
+// Create 创建二级分类
+func (r *GormProductSubCategoryRepository) Create(ctx context.Context, category entities.ProductSubCategory) (*entities.ProductSubCategory, error) {
+	err := r.CreateEntity(ctx, &category)
+	if err != nil {
+		return nil, err
+	}
+	return &category, nil
+}
+
+// GetByID 根据ID获取二级分类
+func (r *GormProductSubCategoryRepository) GetByID(ctx context.Context, id string) (*entities.ProductSubCategory, error) {
+	var entity entities.ProductSubCategory
+	err := r.SmartGetByID(ctx, id, &entity)
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, gorm.ErrRecordNotFound
+		}
+		return nil, err
+	}
+	return &entity, nil
+}
+
+// Update 更新二级分类
+func (r *GormProductSubCategoryRepository) Update(ctx context.Context, category entities.ProductSubCategory) error {
+	return r.UpdateEntity(ctx, &category)
+}
+
+// Delete 删除二级分类
+func (r *GormProductSubCategoryRepository) Delete(ctx context.Context, id string) error {
+	return r.DeleteEntity(ctx, id, &entities.ProductSubCategory{})
+}
+
+// List 获取所有二级分类
+func (r *GormProductSubCategoryRepository) List(ctx context.Context) ([]*entities.ProductSubCategory, error) {
+	var categories []entities.ProductSubCategory
+	err := r.GetDB(ctx).Order("sort ASC, created_at DESC").Find(&categories).Error
+	if err != nil {
+		return nil, err
+	}
+
+	// 转换为指针切片
+	result := make([]*entities.ProductSubCategory, len(categories))
+	for i := range categories {
+		result[i] = &categories[i]
+	}
+	return result, nil
+}
+
+// FindByCode 根据编号查找二级分类
+func (r *GormProductSubCategoryRepository) FindByCode(ctx context.Context, code string) (*entities.ProductSubCategory, error) {
+	var entity entities.ProductSubCategory
+	err := r.GetDB(ctx).Where("code = ?", code).First(&entity).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, gorm.ErrRecordNotFound
+		}
+		return nil, err
+	}
+	return &entity, nil
+}
+
+// FindByCategoryID 根据一级分类ID查找二级分类
+func (r *GormProductSubCategoryRepository) FindByCategoryID(ctx context.Context, categoryID string) ([]*entities.ProductSubCategory, error) {
+	var categories []entities.ProductSubCategory
+	err := r.GetDB(ctx).Where("category_id = ?", categoryID).Order("sort ASC, created_at DESC").Find(&categories).Error
+	if err != nil {
+		return nil, err
+	}
+
+	// 转换为指针切片
+	result := make([]*entities.ProductSubCategory, len(categories))
+	for i := range categories {
+		result[i] = &categories[i]
+	}
+	return result, nil
+}
+
+// FindVisible 查找可见的二级分类
+func (r *GormProductSubCategoryRepository) FindVisible(ctx context.Context) ([]*entities.ProductSubCategory, error) {
+	var categories []entities.ProductSubCategory
+	err := r.GetDB(ctx).Where("is_visible = ? AND is_enabled = ?", true, true).Order("sort ASC, created_at DESC").Find(&categories).Error
+	if err != nil {
+		return nil, err
+	}
+
+	// 转换为指针切片
+	result := make([]*entities.ProductSubCategory, len(categories))
+	for i := range categories {
+		result[i] = &categories[i]
+	}
+	return result, nil
+}
+
+// FindEnabled 查找启用的二级分类
+func (r *GormProductSubCategoryRepository) FindEnabled(ctx context.Context) ([]*entities.ProductSubCategory, error) {
+	var categories []entities.ProductSubCategory
+	err := r.GetDB(ctx).Where("is_enabled = ?", true).Order("sort ASC, created_at DESC").Find(&categories).Error
+	if err != nil {
+		return nil, err
+	}
+
+	// 转换为指针切片
+	result := make([]*entities.ProductSubCategory, len(categories))
+	for i := range categories {
+		result[i] = &categories[i]
+	}
+	return result, nil
+}

internal/infrastructure/http/handlers/sub_category_handler.go

@@ -0,0 +1,229 @@
+package handlers
+
+import (
+	"tyapi-server/internal/application/product"
+	"tyapi-server/internal/application/product/dto/commands"
+	"tyapi-server/internal/application/product/dto/queries"
+	"tyapi-server/internal/shared/interfaces"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+)
+
+// SubCategoryHandler 二级分类HTTP处理器
+type SubCategoryHandler struct {
+	subCategoryAppService product.SubCategoryApplicationService
+	responseBuilder       interfaces.ResponseBuilder
+	validator             interfaces.RequestValidator
+	logger                *zap.Logger
+}
+
+// NewSubCategoryHandler 创建二级分类HTTP处理器
+func NewSubCategoryHandler(
+	subCategoryAppService product.SubCategoryApplicationService,
+	responseBuilder interfaces.ResponseBuilder,
+	validator interfaces.RequestValidator,
+	logger *zap.Logger,
+) *SubCategoryHandler {
+	return &SubCategoryHandler{
+		subCategoryAppService: subCategoryAppService,
+		responseBuilder:       responseBuilder,
+		validator:             validator,
+		logger:                logger,
+	}
+}
+
+// CreateSubCategory 创建二级分类
+// @Summary 创建二级分类
+// @Description 管理员创建新二级分类
+// @Tags 二级分类管理
+// @Accept json
+// @Produce json
+// @Security Bearer
+// @Param request body commands.CreateSubCategoryCommand true "创建二级分类请求"
+// @Success 201 {object} map[string]interface{} "二级分类创建成功"
+// @Failure 400 {object} map[string]interface{} "请求参数错误"
+// @Failure 401 {object} map[string]interface{} "未认证"
+// @Failure 500 {object} map[string]interface{} "服务器内部错误"
+// @Router /api/v1/admin/sub-categories [post]
+func (h *SubCategoryHandler) CreateSubCategory(c *gin.Context) {
+	var cmd commands.CreateSubCategoryCommand
+	if err := h.validator.BindAndValidate(c, &cmd); err != nil {
+		return
+	}
+
+	if err := h.subCategoryAppService.CreateSubCategory(c.Request.Context(), &cmd); err != nil {
+		h.logger.Error("创建二级分类失败", zap.Error(err))
+		h.responseBuilder.BadRequest(c, err.Error())
+		return
+	}
+
+	h.responseBuilder.Created(c, nil, "二级分类创建成功")
+}
+
+// UpdateSubCategory 更新二级分类
+// @Summary 更新二级分类
+// @Description 管理员更新二级分类信息
+// @Tags 二级分类管理
+// @Accept json
+// @Produce json
+// @Security Bearer
+// @Param id path string true "二级分类ID"
+// @Param request body commands.UpdateSubCategoryCommand true "更新二级分类请求"
+// @Success 200 {object} map[string]interface{} "二级分类更新成功"
+// @Failure 400 {object} map[string]interface{} "请求参数错误"
+// @Failure 401 {object} map[string]interface{} "未认证"
+// @Failure 404 {object} map[string]interface{} "二级分类不存在"
+// @Failure 500 {object} map[string]interface{} "服务器内部错误"
+// @Router /api/v1/admin/sub-categories/{id} [put]
+func (h *SubCategoryHandler) UpdateSubCategory(c *gin.Context) {
+	var cmd commands.UpdateSubCategoryCommand
+	cmd.ID = c.Param("id")
+	if cmd.ID == "" {
+		h.responseBuilder.BadRequest(c, "二级分类ID不能为空")
+		return
+	}
+	if err := h.validator.BindAndValidate(c, &cmd); err != nil {
+		return
+	}
+
+	if err := h.subCategoryAppService.UpdateSubCategory(c.Request.Context(), &cmd); err != nil {
+		h.logger.Error("更新二级分类失败", zap.Error(err))
+		h.responseBuilder.BadRequest(c, err.Error())
+		return
+	}
+
+	h.responseBuilder.Success(c, nil, "二级分类更新成功")
+}
+
+// DeleteSubCategory 删除二级分类
+// @Summary 删除二级分类
+// @Description 管理员删除二级分类
+// @Tags 二级分类管理
+// @Accept json
+// @Produce json
+// @Security Bearer
+// @Param id path string true "二级分类ID"
+// @Success 200 {object} map[string]interface{} "二级分类删除成功"
+// @Failure 400 {object} map[string]interface{} "请求参数错误"
+// @Failure 401 {object} map[string]interface{} "未认证"
+// @Failure 404 {object} map[string]interface{} "二级分类不存在"
+// @Failure 500 {object} map[string]interface{} "服务器内部错误"
+// @Router /api/v1/admin/sub-categories/{id} [delete]
+func (h *SubCategoryHandler) DeleteSubCategory(c *gin.Context) {
+	cmd := commands.DeleteSubCategoryCommand{ID: c.Param("id")}
+	if err := h.validator.ValidateParam(c, &cmd); err != nil {
+		return
+	}
+
+	if err := h.subCategoryAppService.DeleteSubCategory(c.Request.Context(), &cmd); err != nil {
+		h.logger.Error("删除二级分类失败", zap.Error(err))
+		h.responseBuilder.BadRequest(c, err.Error())
+		return
+	}
+
+	h.responseBuilder.Success(c, nil, "二级分类删除成功")
+}
+
+// GetSubCategory 获取二级分类详情
+// @Summary 获取二级分类详情
+// @Description 获取指定二级分类的详细信息
+// @Tags 二级分类管理
+// @Accept json
+// @Produce json
+// @Security Bearer
+// @Param id path string true "二级分类ID"
+// @Success 200 {object} responses.SubCategoryInfoResponse "二级分类信息"
+// @Failure 400 {object} map[string]interface{} "请求参数错误"
+// @Failure 401 {object} map[string]interface{} "未认证"
+// @Failure 404 {object} map[string]interface{} "二级分类不存在"
+// @Failure 500 {object} map[string]interface{} "服务器内部错误"
+// @Router /api/v1/admin/sub-categories/{id} [get]
+func (h *SubCategoryHandler) GetSubCategory(c *gin.Context) {
+	query := &queries.GetSubCategoryQuery{ID: c.Param("id")}
+	if err := h.validator.ValidateParam(c, query); err != nil {
+		return
+	}
+
+	result, err := h.subCategoryAppService.GetSubCategoryByID(c.Request.Context(), query)
+	if err != nil {
+		h.logger.Error("获取二级分类失败", zap.Error(err))
+		h.responseBuilder.NotFound(c, err.Error())
+		return
+	}
+
+	h.responseBuilder.Success(c, result, "获取二级分类成功")
+}
+
+// ListSubCategories 获取二级分类列表
+// @Summary 获取二级分类列表
+// @Description 获取二级分类列表，支持筛选和分页
+// @Tags 二级分类管理
+// @Accept json
+// @Produce json
+// @Security Bearer
+// @Param category_id query string false "一级分类ID"
+// @Param page query int false "页码"
+// @Param page_size query int false "每页数量"
+// @Param is_enabled query bool false "是否启用"
+// @Param is_visible query bool false "是否展示"
+// @Param sort_by query string false "排序字段"
+// @Param sort_order query string false "排序方向"
+// @Success 200 {object} responses.SubCategoryListResponse "二级分类列表"
+// @Failure 400 {object} map[string]interface{} "请求参数错误"
+// @Failure 401 {object} map[string]interface{} "未认证"
+// @Failure 500 {object} map[string]interface{} "服务器内部错误"
+// @Router /api/v1/admin/sub-categories [get]
+func (h *SubCategoryHandler) ListSubCategories(c *gin.Context) {
+	query := &queries.ListSubCategoriesQuery{}
+	if err := h.validator.ValidateQuery(c, query); err != nil {
+		return
+	}
+
+	// 设置默认分页参数
+	if query.Page == 0 {
+		query.Page = 1
+	}
+	if query.PageSize == 0 {
+		query.PageSize = 20
+	}
+
+	result, err := h.subCategoryAppService.ListSubCategories(c.Request.Context(), query)
+	if err != nil {
+		h.logger.Error("获取二级分类列表失败", zap.Error(err))
+		h.responseBuilder.BadRequest(c, err.Error())
+		return
+	}
+
+	h.responseBuilder.Success(c, result, "获取二级分类列表成功")
+}
+
+// ListSubCategoriesByCategory 根据一级分类ID获取二级分类列表（级联选择用）
+// @Summary 根据一级分类获取二级分类列表
+// @Description 根据一级分类ID获取二级分类简单列表，用于级联选择
+// @Tags 二级分类管理
+// @Accept json
+// @Produce json
+// @Security Bearer
+// @Param id path string true "一级分类ID"
+// @Success 200 {object} []responses.SubCategorySimpleResponse "二级分类简单列表"
+// @Failure 400 {object} map[string]interface{} "请求参数错误"
+// @Failure 401 {object} map[string]interface{} "未认证"
+// @Failure 500 {object} map[string]interface{} "服务器内部错误"
+// @Router /api/v1/admin/categories/{id}/sub-categories [get]
+func (h *SubCategoryHandler) ListSubCategoriesByCategory(c *gin.Context) {
+	categoryID := c.Param("id")
+	if categoryID == "" {
+		h.responseBuilder.BadRequest(c, "一级分类ID不能为空")
+		return
+	}
+
+	result, err := h.subCategoryAppService.ListSubCategoriesByCategoryID(c.Request.Context(), categoryID)
+	if err != nil {
+		h.logger.Error("获取二级分类列表失败", zap.Error(err))
+		h.responseBuilder.BadRequest(c, err.Error())
+		return
+	}
+
+	h.responseBuilder.Success(c, result, "获取二级分类列表成功")
+}

internal/infrastructure/http/routes/sub_category_routes.go

@@ -0,0 +1,52 @@
+package routes
+
+import (
+	"tyapi-server/internal/infrastructure/http/handlers"
+	sharedhttp "tyapi-server/internal/shared/http"
+	"tyapi-server/internal/shared/middleware"
+)
+
+// SubCategoryRoutes 二级分类路由
+type SubCategoryRoutes struct {
+	handler *handlers.SubCategoryHandler
+	auth    *middleware.JWTAuthMiddleware
+	admin   *middleware.AdminAuthMiddleware
+}
+
+// NewSubCategoryRoutes 创建二级分类路由
+func NewSubCategoryRoutes(
+	handler *handlers.SubCategoryHandler,
+	auth *middleware.JWTAuthMiddleware,
+	admin *middleware.AdminAuthMiddleware,
+) *SubCategoryRoutes {
+	return &SubCategoryRoutes{
+		handler: handler,
+		auth:    auth,
+		admin:   admin,
+	}
+}
+
+// Register 注册路由
+func (r *SubCategoryRoutes) Register(router *sharedhttp.GinRouter) {
+	engine := router.GetEngine()
+	adminGroup := engine.Group("/api/v1/admin")
+	adminGroup.Use(r.auth.Handle())
+	adminGroup.Use(r.admin.Handle())
+	{
+		// 二级分类管理
+		subCategories := adminGroup.Group("/sub-categories")
+		{
+			subCategories.POST("", r.handler.CreateSubCategory)       // 创建二级分类
+			subCategories.PUT("/:id", r.handler.UpdateSubCategory)    // 更新二级分类
+			subCategories.DELETE("/:id", r.handler.DeleteSubCategory) // 删除二级分类
+			subCategories.GET("/:id", r.handler.GetSubCategory)       // 获取二级分类详情
+			subCategories.GET("", r.handler.ListSubCategories)        // 获取二级分类列表
+		}
+
+		// 一级分类下的二级分类路由（级联选择）
+		categoryAdmin := adminGroup.Group("/product-categories")
+		{
+			categoryAdmin.GET("/:id/sub-categories", r.handler.ListSubCategoriesByCategory) // 根据一级分类获取二级分类列表
+		}
+	}
+}