vikunja-api/pkg/migration/20200420215928.go

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// 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 (
"math"
"src.techknowlogick.com/xormigrate"
"xorm.io/xorm"
)
type task20200420215928 struct {
ID int64 `xorm:"int(11) autoincr not null unique pk" json:"id" param:"listtask"`
Position float64 `xorm:"double null" json:"position"`
}
func (s task20200420215928) TableName() string {
return "tasks"
}
func init() {
migrations = append(migrations, &xormigrate.Migration{
ID: "20200420215928",
Description: "Add position property to task",
Migrate: func(tx *xorm.Engine) error {
err := tx.Sync2(task20200420215928{})
if err != nil {
return err
}
// Create a position according to their id -> gives a starting position
tasks := []*task20200420215928{}
err = tx.Find(&tasks)
if err != nil {
return err
}
for _, task := range tasks {
task.Position = float64(task.ID) * math.Pow(2, 16)
_, err = tx.Where("id = ?", task.ID).Update(task)
if err != nil {
return err
}
}
return nil
},
Rollback: func(tx *xorm.Engine) error {
return tx.DropTables(task20200420215928{})
},
})
}