上级店铺名称

internal/model/dto/shop_dto.go

@@ -43,6 +43,7 @@ type ShopResponse struct {
 	ShopName       string `json:"shop_name" description:"店铺名称"`
 	ShopCode       string `json:"shop_code" description:"店铺编号"`
 	ParentID       *uint  `json:"parent_id,omitempty" description:"上级店铺ID"`
+	ParentShopName string `json:"parent_shop_name,omitempty" description:"上级店铺名称"`
 	Level          int    `json:"level" description:"店铺层级 (1-7级)"`
 	ContactName    string `json:"contact_name" description:"联系人姓名"`
 	ContactPhone   string `json:"contact_phone" description:"联系人电话"`

internal/service/shop/service.go

@@ -53,11 +53,13 @@ func (s *Service) Create(ctx context.Context, req *dto.CreateShopRequest) (*dto.
 	}
 
 	level := 1
+	parentShopName := ""
 	if req.ParentID != nil {
 		parent, err := s.shopStore.GetByID(ctx, *req.ParentID)
 		if err != nil {
 			return nil, errors.New(errors.CodeInvalidParentID, "上级店铺不存在或无效")
 		}
+		parentShopName = parent.ShopName
 		level = parent.Level + 1
 		if level > constants.ShopMaxLevel {
 			return nil, errors.New(errors.CodeShopLevelExceeded, "店铺层级不能超过 7 级")
@@ -182,6 +184,7 @@ func (s *Service) Create(ctx context.Context, req *dto.CreateShopRequest) (*dto.
 		ShopName:       shop.ShopName,
 		ShopCode:       shop.ShopCode,
 		ParentID:       shop.ParentID,
+		ParentShopName: parentShopName,
 		Level:          shop.Level,
 		ContactName:    shop.ContactName,
 		ContactPhone:   shop.ContactPhone,
@@ -221,11 +224,20 @@ func (s *Service) Update(ctx context.Context, id uint, req *dto.UpdateShopReques
 		return nil, err
 	}
 
+	parentShopName := ""
+	if shop.ParentID != nil {
+		parentShop, err := s.shopStore.GetByID(ctx, *shop.ParentID)
+		if err == nil {
+			parentShopName = parentShop.ShopName
+		}
+	}
+
 	return &dto.ShopResponse{
 		ID:             shop.ID,
 		ShopName:       shop.ShopName,
 		ShopCode:       shop.ShopCode,
 		ParentID:       shop.ParentID,
+		ParentShopName: parentShopName,
 		Level:          shop.Level,
 		ContactName:    shop.ContactName,
 		ContactPhone:   shop.ContactPhone,
@@ -326,13 +338,24 @@ func (s *Service) ListShopResponses(ctx context.Context, req *dto.ShopListReques
 		return nil, 0, errors.Wrap(errors.CodeInternalError, err, "查询店铺列表失败")
 	}
 
+	parentShopNameMap, err := s.buildParentShopNameMap(ctx, shops)
+	if err != nil {
+		return nil, 0, errors.Wrap(errors.CodeInternalError, err, "查询上级店铺名称失败")
+	}
+
 	responses := make([]*dto.ShopResponse, 0, len(shops))
 	for _, shop := range shops {
+		parentShopName := ""
+		if shop.ParentID != nil {
+			parentShopName = parentShopNameMap[*shop.ParentID]
+		}
+
 		responses = append(responses, &dto.ShopResponse{
 			ID:             shop.ID,
 			ShopName:       shop.ShopName,
 			ShopCode:       shop.ShopCode,
 			ParentID:       shop.ParentID,
+			ParentShopName: parentShopName,
 			Level:          shop.Level,
 			ContactName:    shop.ContactName,
 			ContactPhone:   shop.ContactPhone,
@@ -350,6 +373,37 @@ func (s *Service) ListShopResponses(ctx context.Context, req *dto.ShopListReques
 	return responses, total, nil
 }
 
+// buildParentShopNameMap 批量查询店铺上级名称，避免列表接口出现 N+1 查询。
+func (s *Service) buildParentShopNameMap(ctx context.Context, shops []*model.Shop) (map[uint]string, error) {
+	parentIDs := make([]uint, 0, len(shops))
+	parentIDSet := make(map[uint]struct{}, len(shops))
+	for _, shop := range shops {
+		if shop.ParentID == nil {
+			continue
+		}
+		if _, exists := parentIDSet[*shop.ParentID]; exists {
+			continue
+		}
+		parentIDSet[*shop.ParentID] = struct{}{}
+		parentIDs = append(parentIDs, *shop.ParentID)
+	}
+
+	if len(parentIDs) == 0 {
+		return map[uint]string{}, nil
+	}
+
+	parentShops, err := s.shopStore.GetByIDs(ctx, parentIDs)
+	if err != nil {
+		return nil, err
+	}
+
+	parentShopNameMap := make(map[uint]string, len(parentShops))
+	for _, parentShop := range parentShops {
+		parentShopNameMap[parentShop.ID] = parentShop.ShopName
+	}
+	return parentShopNameMap, nil
+}
+
 func (s *Service) List(ctx context.Context, opts *store.QueryOptions, filters map[string]interface{}) ([]*model.Shop, int64, error) {
 	return s.shopStore.List(ctx, opts, filters)
 }