修复更新节点时并发导致的分配失败问题

actions/cities.go

@@ -20,7 +20,7 @@ func FindCitiesWithEdgesCount(tx *gorm.DB) ([]model.City, error) {
 		model.City
 		EdgesCount int `gorm:"column:edges_count"`
 	}
-	err := tx.Debug().
+	err := tx.
 		Select("cityhash.*, COUNT(edge.id) AS edges_count").
 		Joins("LEFT JOIN edge ON edge.city_id = cityhash.id").
 		Where("cityhash.label IS NOT NULL").

actions/update.go

@@ -94,6 +94,14 @@ func Update(args ...UpdateArgs) error {
 		if err != nil {
 			return fmt.Errorf("查询城市 %s 可用节点失败：%w", city.Name, err)
 		}
+		if len(edges) < count {
+			slog.Debug("城市节点不足，将循环使用节点", "城市", city.Name, "节点数", city.EdgesCount, "网关数", count)
+			edges, err = SliceActiveEdgesByCity(tx, city.Id, 0, count)
+			if err != nil {
+				return fmt.Errorf("查询城市 %s 可用节点失败：%w", city.Name, err)
+			}
+			offset = 0
+		}
 
 		// 更新网关配置
 		var configs2Create []model.Config