新增排查自己的逻辑

internal/model/dto/shop_dto.go

@@ -74,8 +74,9 @@ type UpdateShopParams struct {
 
 // ShopCascadeRequest 店铺联级查询请求
 type ShopCascadeRequest struct {
-	ShopName string `json:"shop_name" query:"shop_name" validate:"omitempty,max=100" maxLength:"100" description:"店铺名称（模糊查询）"`
-	ParentID *uint  `json:"parent_id" query:"parent_id" validate:"omitempty,min=1" minimum:"1" description:"上级店铺ID（不传则查询顶级店铺）"`
+	ShopName    string `json:"shop_name" query:"shop_name" validate:"omitempty,max=100" maxLength:"100" description:"店铺名称（模糊查询）"`
+	ParentID    *uint  `json:"parent_id" query:"parent_id" validate:"omitempty,min=1" minimum:"1" description:"上级店铺ID（不传则查询顶级店铺）"`
+	ExcludeSelf bool   `json:"exclude_self" query:"exclude_self" description:"是否排除当前账号自身店铺，默认false"`
 }
 
 // ShopCascadeItem 联级查询结果项

internal/service/shop/service.go

@@ -410,7 +410,7 @@ func (s *Service) List(ctx context.Context, opts *store.QueryOptions, filters ma
 
 // ListCascade 联级查询店铺，用于新增店铺或其他场景选择上级店铺
 func (s *Service) ListCascade(ctx context.Context, req *dto.ShopCascadeRequest) ([]*dto.ShopCascadeItem, error) {
-	shops, err := s.shopStore.ListForCascade(ctx, req.ShopName, req.ParentID)
+	shops, err := s.shopStore.ListForCascade(ctx, req.ShopName, req.ParentID, req.ExcludeSelf)
 	if err != nil {
 		return nil, errors.Wrap(errors.CodeInternalError, err, "查询店铺失败")
 	}

internal/store/postgres/shop_store.go

@@ -229,25 +229,32 @@ func (s *ShopStore) GetByIDs(ctx context.Context, ids []uint) ([]*model.Shop, er
 	return shops, nil
 }
 
-// ListForCascade 联级查询店铺（支持按名称模糊查询和按上级ID过滤）
-func (s *ShopStore) ListForCascade(ctx context.Context, shopName string, parentID *uint) ([]*model.Shop, error) {
+// ListForCascade 联级查询店铺（支持按名称模糊查询、按上级ID过滤和排除自身）
+func (s *ShopStore) ListForCascade(ctx context.Context, shopName string, parentID *uint, excludeSelf bool) ([]*model.Shop, error) {
 	query := s.db.WithContext(ctx).Model(&model.Shop{})
 	query = middleware.ApplyShopIDFilter(ctx, query)
+	currentShopID := middleware.GetShopIDFromContext(ctx)
 
 	if parentID != nil {
 		query = query.Where("parent_id = ?", *parentID)
 	} else if middleware.GetUserTypeFromContext(ctx) == constants.UserTypeAgent {
-		shopID := middleware.GetShopIDFromContext(ctx)
-		if shopID == 0 {
+		if currentShopID == 0 {
 			query = query.Where("1 = 0")
+		} else if excludeSelf {
+			// 排除自身时，代理账号的级联根节点从自身下级开始。
+			query = query.Where("parent_id = ?", currentShopID)
 		} else {
 			// 代理账号的级联根节点是自己的店铺，避免默认根查询落到平台顶级店铺。
-			query = query.Where("id = ?", shopID)
+			query = query.Where("id = ?", currentShopID)
 		}
 	} else {
 		query = query.Where("parent_id IS NULL")
 	}
 
+	if excludeSelf && currentShopID > 0 {
+		query = query.Where("id <> ?", currentShopID)
+	}
+
 	if shopName != "" {
 		query = query.Where("shop_name LIKE ?", "%"+shopName+"%")
 	}