}}
	if err := DB.Save(&want).Error; err != nil {
		t.Error(err)
	}

	want2 := Level2{Value: "Tom", LanguageCode: "zh", Level1s: []Level1{
		{Value: "zh", LanguageCode: "zh"},
		{Value: "de", LanguageCode: "de"},
	}}
	if err := DB.Save(&want2).Error; err != nil {
		t.Error(err)
	}

	var got Level2
	if err := DB.Preload("Level1s").Find(&got, "value = ?", "Bob").Error; err != nil {
		t.Error(err)
	}