fix(region): filter unused snapshot (#21563)

cmd/climc/shell/compute/snapshots.go

@@ -32,6 +32,7 @@ func init() {
 		Share       *bool  `help:"Show shared snapshots"`
 		DiskType    string `help:"Filter by disk type" choices:"sys|data"`
 		Server      string `help:"Filter by server" json:"server_id"`
+		Unused      bool
 
 		OrderByGuest    string
 		OrderByDiskName string

pkg/apis/compute/snapshot.go

@@ -74,6 +74,9 @@ type SnapshotListInput struct {
 	// list server snapshots
 	ServerId string `json:"server_id"`
 
+	// 未关联任何磁盘
+	Unused bool `json:"unused"`
+
 	// 按虚拟机名称排序
 	// pattern:asc|desc
 	OrderByGuest string `json:"order_by_guest"`

pkg/compute/models/snapshots.go

@@ -205,6 +205,11 @@ func (manager *SSnapshotManager) ListItemFilter(
 		q = q.In("disk_id", gdq)
 	}
 
+	if query.Unused {
+		sq := DiskManager.Query("id").Distinct().SubQuery()
+		q = q.NotIn("disk_id", sq)
+	}
+
 	return q, nil
 }