Fix missing auto increments from b0d4902406 on mysql

Fixes #744

pkg/migration/20201219145028.go

@@ -0,0 +1,77 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-2020 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 General Public License 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package migration
+
+import (
+	"code.vikunja.io/api/pkg/config"
+	"code.vikunja.io/api/pkg/log"
+	"src.techknowlogick.com/xormigrate"
+	"xorm.io/xorm"
+)
+
+func addAutoIncrementToIDColumns(x *xorm.Session, table string) (err error) {
+	_, err = x.Exec("ALTER TABLE " + table + " MODIFY `id` BIGINT AUTO_INCREMENT NOT NULL")
+	return
+}
+
+func init() {
+	migrations = append(migrations, &xormigrate.Migration{
+		ID:          "20201219145028",
+		Description: "Re-add auto increment columns",
+		Migrate: func(tx *xorm.Engine) error {
+			if config.DatabaseType.GetString() != "mysql" {
+				log.Debugf("Not migrating since mysql is the only thing that broke in 20201218152741")
+				return nil
+			}
+
+			columns := []string{
+				"totp",
+				"users",
+				"files",
+				"namespaces",
+				"team_list",
+				"label_task",
+				"task_relations",
+				"team_namespaces",
+				"users_namespace",
+				"teams",
+				"team_members",
+				"task_assignees",
+				"users_list",
+				"tasks",
+				"task_reminders",
+				"task_attachments",
+				"list",
+				"labels",
+				"buckets",
+				"link_sharing",
+				"migration_status",
+			}
+
+			s := tx.NewSession()
+			for _, table := range columns {
+				if err := addAutoIncrementToIDColumns(s, table); err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+		Rollback: func(tx *xorm.Engine) error {
+			return nil
+		},
+	})
+}