/
migrations.go
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/
migrations.go
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// This file is part of the Smart Home
// Program complex distribution https://github.com/e154/smart-home
// Copyright (C) 2016-2021, Filippov Alex
//
// This library is free software: you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library. If not, see
// <https://www.gnu.org/licenses/>.
package migrations
import (
"fmt"
"net/http"
"path"
"github.com/jinzhu/gorm"
migrate "github.com/rubenv/sql-migrate"
"github.com/e154/smart-home/common/logger"
"github.com/e154/smart-home/migrations"
. "github.com/e154/smart-home/system/migrations/assets"
"github.com/e154/smart-home/system/orm"
)
var (
log = logger.MustGetLogger("migrations")
)
// Migrations ...
type Migrations struct {
cfg *orm.Config
source migrate.MigrationSource
orm *orm.Orm
db *gorm.DB
}
// NewMigrations ...
func NewMigrations(cfg *orm.Config,
db *gorm.DB,
orm *orm.Orm,
mConf *Config) *Migrations {
var source migrate.MigrationSource
switch mConf.Source {
case "embed":
source = &migrate.HttpFileSystemMigrationSource{FileSystem: http.FS(migrations.F)}
case "assets", "":
source = &migrate.AssetMigrationSource{
Asset: Asset,
AssetDir: AssetDir,
Dir: mConf.Dir,
}
case "dir":
source = &migrate.FileMigrationSource{
Dir: path.Join(mConf.Dir),
}
default:
panic(fmt.Sprintf("unknown source %s", mConf.Source))
}
return &Migrations{
cfg: cfg,
source: source,
orm: orm,
db: db,
}
}
// Up ...
func (m Migrations) Up() (err error) {
var n int
if n, err = migrate.Exec(m.orm.DB(), "postgres", m.source, migrate.Up); err != nil {
log.Error(err.Error())
}
log.Infof("Applied %d migrations!", n)
return
}
// Down ...
func (m Migrations) Down() (err error) {
var n int
if n, err = migrate.Exec(m.orm.DB(), "postgres", m.source, migrate.Down); err != nil {
log.Error(err.Error())
}
fmt.Printf("Applied %d migrations!\n", n)
return
}
// Purge ...
func (m Migrations) Purge() (err error) {
fmt.Printf("Purge database: %s\n", m.cfg.Name)
if err = m.db.Exec(`DROP SCHEMA IF EXISTS "public" CASCADE;`).Error; err != nil {
log.Error(err.Error())
return
}
if err = m.db.Exec(`CREATE SCHEMA "public";`).Error; err != nil {
log.Error(err.Error())
return
}
err = m.Up()
return
}