`ec.encode`: Fix resolution of target collections. (#6585)

* Don't ignore empty (`""`) collection names when computing collections for a given volume ID.

* `ec.encode`: Fix resolution of target collections.

When no `volumeId` parameter is provided, compute volumes
based on the provided collection name, even if it's empty (`""`).

This restores behavior to before recent EC rebalancing rework. See also
https://github.com/seaweedfs/seaweedfs/blob/ec30a504bae6cad75f859964e14c60d39cc43709/weed/shell/command_ec_encode.go#L99 .

1 files changed, 2 insertions, 2 deletions

diff --git a/weed/shell/command_ec_common.go b/weed/shell/command_ec_common.go
index f2845224e..c49ab7611 100644
--- a/weed/shell/command_ec_common.go
+++ b/weed/shell/command_ec_common.go
@@ -248,14 +248,14 @@ func collectCollectionsForVolumeIds(t *master_pb.TopologyInfo, vids []needle.Vol
 				for _, diskInfo := range dn.DiskInfos {
 					for _, vi := range diskInfo.VolumeInfos {
 						for _, vid := range vids {
-							if needle.VolumeId(vi.Id) == vid && vi.Collection != "" {
+							if needle.VolumeId(vi.Id) == vid {
 								found[vi.Collection] = true
 							}
 						}
 					}
 					for _, ecs := range diskInfo.EcShardInfos {
 						for _, vid := range vids {
-							if needle.VolumeId(ecs.Id) == vid && ecs.Collection != "" {
+							if needle.VolumeId(ecs.Id) == vid {
 								found[ecs.Collection] = true
 							}
 						}