mirror of
https://github.com/astaxie/beego.git
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281 lines
6.5 KiB
Go
281 lines
6.5 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// migration package for migration
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//
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// The table structure is as follow:
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//
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// CREATE TABLE `migrations` (
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// `id_migration` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT 'surrogate key',
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// `name` varchar(255) DEFAULT NULL COMMENT 'migration name, unique',
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// `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT 'date migrated or rolled back',
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// `statements` longtext COMMENT 'SQL statements for this migration',
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// `rollback_statements` longtext,
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// `status` enum('update','rollback') DEFAULT NULL COMMENT 'update indicates it is a normal migration while rollback means this migration is rolled back',
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// PRIMARY KEY (`id_migration`)
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// ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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package migration
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import (
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"errors"
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"sort"
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"strings"
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"time"
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"github.com/astaxie/beego"
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"github.com/astaxie/beego/orm"
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)
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// const the data format for the bee generate migration datatype
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const (
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M_DATE_FORMAT = "20060102_150405"
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M_DB_DATE_FORMAT = "2006-01-02 15:04:05"
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)
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// Migrationer is an interface for all Migration struct
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type Migrationer interface {
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Up()
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Down()
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Reset()
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Exec(name, status string) error
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GetCreated() int64
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}
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var (
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migrationMap map[string]Migrationer
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)
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func init() {
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migrationMap = make(map[string]Migrationer)
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}
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// the basic type which will implement the basic type
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type Migration struct {
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sqls []string
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Created string
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}
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// implement in the Inheritance struct for upgrade
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func (m *Migration) Up() {
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}
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// implement in the Inheritance struct for down
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func (m *Migration) Down() {
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}
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// add sql want to execute
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func (m *Migration) Sql(sql string) {
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m.sqls = append(m.sqls, sql)
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}
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// Reset the sqls
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func (m *Migration) Reset() {
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m.sqls = make([]string, 0)
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}
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// execute the sql already add in the sql
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func (m *Migration) Exec(name, status string) error {
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o := orm.NewOrm()
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for _, s := range m.sqls {
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beego.Info("exec sql:", s)
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r := o.Raw(s)
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_, err := r.Exec()
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if err != nil {
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return err
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}
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}
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return m.addOrUpdateRecord(name, status)
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}
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func (m *Migration) addOrUpdateRecord(name, status string) error {
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o := orm.NewOrm()
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if status == "down" {
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status = "rollback"
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p, err := o.Raw("update migrations set `status` = ?, `rollback_statements` = ?, `created_at` = ? where name = ?").Prepare()
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if err != nil {
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return nil
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}
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_, err = p.Exec(status, strings.Join(m.sqls, "; "), time.Now().Format(M_DB_DATE_FORMAT), name)
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return err
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} else {
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status = "update"
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p, err := o.Raw("insert into migrations(`name`, `created_at`, `statements`, `status`) values(?,?,?,?)").Prepare()
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if err != nil {
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return err
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}
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_, err = p.Exec(name, time.Now().Format(M_DB_DATE_FORMAT), strings.Join(m.sqls, "; "), status)
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return err
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}
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}
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// get the unixtime from the Created
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func (m *Migration) GetCreated() int64 {
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t, err := time.Parse(M_DATE_FORMAT, m.Created)
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if err != nil {
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return 0
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}
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return t.Unix()
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}
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// register the Migration in the map
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func Register(name string, m Migrationer) error {
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if _, ok := migrationMap[name]; ok {
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return errors.New("already exist name:" + name)
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}
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migrationMap[name] = m
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return nil
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}
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// upgrate the migration from lasttime
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func Upgrade(lasttime int64) error {
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sm := sortMap(migrationMap)
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i := 0
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for _, v := range sm {
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if v.created > lasttime {
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beego.Info("start upgrade", v.name)
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v.m.Reset()
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v.m.Up()
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err := v.m.Exec(v.name, "up")
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if err != nil {
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beego.Error("execute error:", err)
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time.Sleep(2 * time.Second)
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return err
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}
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beego.Info("end upgrade:", v.name)
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i++
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}
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}
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beego.Info("total success upgrade:", i, " migration")
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time.Sleep(2 * time.Second)
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return nil
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}
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//rollback the migration by the name
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func Rollback(name string) error {
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if v, ok := migrationMap[name]; ok {
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beego.Info("start rollback")
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v.Reset()
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v.Down()
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err := v.Exec(name, "down")
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if err != nil {
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beego.Error("execute error:", err)
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time.Sleep(2 * time.Second)
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return err
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}
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beego.Info("end rollback")
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time.Sleep(2 * time.Second)
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return nil
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} else {
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beego.Error("not exist the migrationMap name:" + name)
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time.Sleep(2 * time.Second)
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return errors.New("not exist the migrationMap name:" + name)
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}
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}
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// reset all migration
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// run all migration's down function
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func Reset() error {
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sm := sortMap(migrationMap)
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i := 0
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for j := len(sm) - 1; j >= 0; j-- {
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v := sm[j]
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if isRollBack(v.name) {
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beego.Info("skip the", v.name)
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time.Sleep(1 * time.Second)
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continue
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}
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beego.Info("start reset:", v.name)
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v.m.Reset()
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v.m.Down()
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err := v.m.Exec(v.name, "down")
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if err != nil {
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beego.Error("execute error:", err)
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time.Sleep(2 * time.Second)
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return err
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}
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i++
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beego.Info("end reset:", v.name)
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}
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beego.Info("total success reset:", i, " migration")
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time.Sleep(2 * time.Second)
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return nil
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}
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// first Reset, then Upgrade
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func Refresh() error {
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err := Reset()
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if err != nil {
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beego.Error("execute error:", err)
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time.Sleep(2 * time.Second)
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return err
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}
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err = Upgrade(0)
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return err
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}
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type dataSlice []data
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type data struct {
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created int64
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name string
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m Migrationer
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}
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// Len is part of sort.Interface.
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func (d dataSlice) Len() int {
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return len(d)
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}
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// Swap is part of sort.Interface.
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func (d dataSlice) Swap(i, j int) {
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d[i], d[j] = d[j], d[i]
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}
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// Less is part of sort.Interface. We use count as the value to sort by
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func (d dataSlice) Less(i, j int) bool {
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return d[i].created < d[j].created
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}
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func sortMap(m map[string]Migrationer) dataSlice {
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s := make(dataSlice, 0, len(m))
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for k, v := range m {
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d := data{}
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d.created = v.GetCreated()
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d.name = k
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d.m = v
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s = append(s, d)
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}
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sort.Sort(s)
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return s
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}
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func isRollBack(name string) bool {
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o := orm.NewOrm()
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var maps []orm.Params
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num, err := o.Raw("select * from migrations where `name` = ? order by id_migration desc", name).Values(&maps)
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if err != nil {
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beego.Info("get name has error", err)
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return false
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}
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if num <= 0 {
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return false
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}
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if maps[0]["status"] == "rollback" {
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return true
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}
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return false
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}
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