vikunja-api/pkg/migration/20191207220736.go

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// Copyright 2018-2020 Vikunja and contriubtors. All rights reserved.
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//
// This file is part of Vikunja.
//
// Vikunja 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.
//
// Vikunja 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 Vikunja. If not, see <https://www.gnu.org/licenses/>.
package migration
import (
"src.techknowlogick.com/xormigrate"
"xorm.io/xorm"
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)
type task20191207220736 struct {
ID int64 `xorm:"int(11) autoincr not null unique pk" json:"id" param:"listtask"`
Index int64 `xorm:"int(11) not null default 0" json:"index"`
ListID int64 `xorm:"int(11) INDEX not null" json:"list_id" param:"list"`
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}
func (task20191207220736) TableName() string {
return "tasks"
}
func init() {
migrations = append(migrations, &xormigrate.Migration{
ID: "20191207220736",
Description: "Add task index to tasks",
Migrate: func(tx *xorm.Engine) error {
err := tx.Sync2(task20191207220736{})
if err != nil {
return err
}
// Get all tasks, ordered by list and id
tasks := []*task20191207220736{}
err = tx.
OrderBy("list_id asc, id asc").
Find(&tasks)
if err != nil {
return err
}
var currentIndex int64 = 1
for i, task := range tasks {
// Reset the current counter if we're encountering a new list
// We can do this because the list is sorted by list id
if i > 0 && tasks[i-1].ListID != task.ListID {
currentIndex = 1
}
task.Index = currentIndex
_, err = tx.Where("id = ?", task.ID).Update(task)
if err != nil {
return err
}
currentIndex++
}
return nil
},
Rollback: func(tx *xorm.Engine) error {
return dropTableColum(tx, "tasks", "index")
},
})
}