feat(cli): add cli command to delete orphan task positions

pkg/cmd/maintenance.go

@@ -0,0 +1,56 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-present Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public Licensee as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public Licensee for more details.
+//
+// You should have received a copy of the GNU Affero General Public Licensee
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	"code.vikunja.io/api/pkg/db"
+	"code.vikunja.io/api/pkg/initialize"
+	"code.vikunja.io/api/pkg/log"
+	"code.vikunja.io/api/pkg/models"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(deleteOrphanTaskPositions)
+}
+
+var deleteOrphanTaskPositions = &cobra.Command{
+	Use:   "delete-orphan-task-positions",
+	Short: "Removes all task positions for tasks or project views which don't exist anymore.",
+	PreRun: func(_ *cobra.Command, _ []string) {
+		initialize.FullInitWithoutAsync()
+	},
+	Run: func(_ *cobra.Command, _ []string) {
+
+		s := db.NewSession()
+		defer s.Close()
+
+		count, err := models.DeleteOrphanedTaskPositions(s)
+		if err != nil {
+			log.Errorf("Could not delete orphaned task positions: %s", err)
+			return
+		}
+
+		if count == 0 {
+			log.Infof("No orphaned task positions found.")
+			return
+		}
+
+		log.Infof("Successfully deleted %d orphaned task positions.", count)
+	},
+}

pkg/models/task_position.go

@@ -242,3 +242,9 @@ func calculateNewPositionForTask(s *xorm.Session, a web.Auth, t *Task, view *Pro
 		Position:      calculateDefaultPosition(t.Index, t.Position),
 	}, nil
 }
+
+func DeleteOrphanedTaskPositions(s *xorm.Session) (count int64, err error) {
+	return s.
+		Where("task_id not in (select id from tasks) OR project_view_id not in (select id from project_views)").
+		Delete(&TaskPosition{})
+}