diff --git a/pkg/compute/hostdrivers/kvm.go b/pkg/compute/hostdrivers/kvm.go
index bb050254b2..ed9047dde1 100644
--- a/pkg/compute/hostdrivers/kvm.go
+++ b/pkg/compute/hostdrivers/kvm.go
@@ -45,7 +45,7 @@ func (self *SKVMHostDriver) CheckAndSetCacheImage(ctx context.Context, host *mod
 		return err
 	}
 	cacheImage := obj.(*models.SCachedimage)
-	srcHostCacheImage, err := cacheImage.ChooseSourceStoragecacheInRange(models.HOST_TYPE_HYPERVISOR, []string{host.Id}, []*models.SZone{host.GetZone()})
+	srcHostCacheImage, err := cacheImage.ChooseSourceStoragecacheInRange(models.HOST_TYPE_HYPERVISOR, []string{host.Id}, []interface{}{host.GetZone()})
 	if err != nil {
 		return err
 	}
diff --git a/pkg/compute/models/cachedimages.go b/pkg/compute/models/cachedimages.go
index 6b77db2a71..652701c9c8 100644
--- a/pkg/compute/models/cachedimages.go
+++ b/pkg/compute/models/cachedimages.go
@@ -283,7 +283,7 @@ func (self *SCachedimage) addRefCount() {
 	}
 }
 
-func (self *SCachedimage) ChooseSourceStoragecacheInRange(hostType string, excludes []string, rangeObjs interface{}) (*SStoragecachedimage, error) {
+func (self *SCachedimage) ChooseSourceStoragecacheInRange(hostType string, excludes []string, rangeObjs []interface{}) (*SStoragecachedimage, error) {
 	storageCachedImage := StoragecachedimageManager.Query().SubQuery()
 	storage := StorageManager.Query().SubQuery()
 	hostStorage := HoststorageManager.Query().SubQuery()
@@ -307,16 +307,15 @@ func (self *SCachedimage) ChooseSourceStoragecacheInRange(hostType string, exclu
 		q = q.Filter(sqlchemy.Equals(host.Field("host_type"), hostType))
 	}
 
-	switch v := rangeObjs.(type) {
-	case []*SZone:
-		for _, obj := range v {
-			q = q.Filter(sqlchemy.Equals(host.Field("zone_id"), obj.Id))
-		}
-	case []*SCloudprovider:
-		for _, obj := range v {
-			q = q.Filter(sqlchemy.Equals(host.Field("manager_id"), obj.Id))
+	for _, rangeObj := range rangeObjs {
+		switch v := rangeObj.(type) {
+		case *SZone:
+			q = q.Filter(sqlchemy.Equals(host.Field("zone_id"), v.Id))
+		case *SCloudprovider:
+			q = q.Filter(sqlchemy.Equals(host.Field("manager_id"), v.Id))
 		}
 	}
+
 	err := db.FetchModelObjects(StoragecachedimageManager, q, &scimgs)
 	if err != nil {
 		return nil, err