Name   string `gorm:"primarykey"`
		Value  string
	}

	type Book struct {
		ID     int
		Name   string
		Labels []Label
	}

	DB.Migrator().DropTable(&Label{}, &Book{})
	if err := DB.AutoMigrate(&Label{}, &Book{}); err != nil {
		t.Fatalf("failed to migrate, got %v", err)
	}

	book := Book{
		Name: "my book",
		Labels: []Label{
			{Name: "region", Value: "emea"},
		},
	}