ID     uint   `gorm:"primary_key"`
		Locale string `gorm:"primary_key"`
		Value  string
	}

	type Blog struct {
		ID         uint   `gorm:"primary_key"`
		Locale     string `gorm:"primary_key"`
		Subject    string
		Body       string
		Tags       []Tag `gorm:"many2many:blog_tags;"`
		SharedTags []Tag `gorm:"many2many:shared_blog_tags;ForeignKey:id;References:id"`

	if DB.Dialector.Name() != "sqlserver" {
		// In SQLServer, If an index or constraint depends on the column,
		// this column will not be able to run ALTER
		// see https://stackoverflow.com/questions/19460912/the-object-df-is-dependent-on-column-changing-int-to-double/19461205#19461205
		// may we need to create another PR to fix it, see https://github.com/go-gorm/sqlserver/pull/106
		tests = []TestCase{

	if err := DB.AutoMigrate(&Blog{}, &Tag{}); err != nil {
		t.Fatalf("Failed to auto migrate, got error: %v", err)
	}

	blog := Blog{
		Locale:  "ZH",
		Subject: "subject",
		Body:    "body",
		Tags: []Tag{
			{Locale: "ZH", Value: "tag1"},
			{Locale: "ZH", Value: "tag2"},
		},
	}

	DB.Save(&blog)
	if !compareTags(blog.Tags, []string{"tag1", "tag2"}) {