fix monapi clean stra

src/modules/monapi/scache/aggr.go

@@ -103,7 +103,7 @@ func cleanAggrCalcStra() {
 			continue
 		}
 
-		if node.Id == 0 {
+		if node == nil {
 			logger.Infof("delete aggr_calc stra:%d", stra.Id)
 			if err := models.AggrCalcDel(stra.Id); err != nil {
 				logger.Warningf("delete stra: %d, err: %v", stra.Id, err)

src/modules/monapi/scache/collect.go

@@ -217,7 +217,7 @@ func cleanCollect() {
 			continue
 		}
 
-		if node.Id == 0 {
+		if node == nil {
 			logger.Infof("delete collect: %+v", collect)
 			if err := models.DeleteCollectById(collectType, "sys", id); err != nil {
 				logger.Warningf("delete collect %s: %d, err: %v", collectType, id, err)

src/modules/monapi/scache/stra.go

@@ -116,7 +116,7 @@ func cleanStra() {
 			continue
 		}
 
-		if node.Id == 0 {
+		if node == nil {
 			logger.Infof("delete stra:%d", stra.Id)
 			if err := models.StraDel(stra.Id); err != nil {
 				logger.Warningf("delete stra: %d, err: %v", stra.Id, err)