main.go

package main

import (
	"log"
	"os"

	"github.com/jinzhu/gorm"
	_ "github.com/jinzhu/gorm/dialects/sqlite"
	"gopkg.in/gormigrate.v1"
)

type Person struct {
	gorm.Model
	Name string
}

type Pet struct {
	gorm.Model
	Name     string
	PersonID int
}

func main() {
	db, err := gorm.Open("sqlite3", os.TempDir() + "my-db.sqlite3")
	if err != nil {
		log.Fatal(err)
	}
	if err = db.DB().Ping(); err != nil {
		log.Fatal(err)
	}

	db.LogMode(true)

	m := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
		{
			ID: "201608301400",
			Migrate: func(tx *gorm.DB) error {
				return tx.AutoMigrate(&Person{}).Error
			},
			Rollback: func(tx *gorm.DB) error {
				return tx.DropTable("people").Error
			},
		},
		{
			ID: "201608301430",
			Migrate: func(tx *gorm.DB) error {
				return tx.AutoMigrate(&Pet{}).Error
			},
			Rollback: func(tx *gorm.DB) error {
				return tx.DropTable("pets").Error
			},
		},
	})

	err = m.Migrate()
	if err == nil {
		log.Printf("Migration did run successfully")
	} else {
		log.Printf("Could not migrate: %v", err)
	}
}