}

		switch reflectValue.Kind() {
		case reflect.Slice, reflect.Array:
			var (
				elem        reflect.Value
				isArrayKind = reflectValue.Kind() == reflect.Array
			)

			if !update || reflectValue.Len() == 0 {
				update = false
				if isArrayKind {
					db.Statement.ReflectValue.Set(reflect.Zero(reflectValue.Type()))
				} else {

	// ErrEmptySlice empty slice found
	ErrEmptySlice = errors.New("empty slice found")
	// ErrDryRunModeUnsupported dry run mode unsupported
	ErrDryRunModeUnsupported = errors.New("dry run mode unsupported")
	// ErrInvalidDB invalid db
	ErrInvalidDB = errors.New("invalid db")
	// ErrInvalidValue invalid value
	ErrInvalidValue = errors.New("invalid value, should be pointer to struct or slice")

	DB.Preload("Pets.Toy").Find(&user4, "id = ?", user.ID)
	CheckUser(t, *user4, user)
}

func TestNestedPreloadForSlice(t *testing.T) {
	users := []User{
		*GetUser("slice_nested_preload_1", Config{Pets: 2}),
		*GetUser("slice_nested_preload_2", Config{Pets: 0}),
		*GetUser("slice_nested_preload_3", Config{Pets: 3}),
	}

	for _, user := range users {
		for idx, pet := range user.Pets {

				return err
			}
		} else if rel := relationships.Relations[name]; rel != nil {
			if joined, nestedJoins := isJoined(name); joined {
				switch rv := db.Statement.ReflectValue; rv.Kind() {
				case reflect.Slice, reflect.Array:
					if rv.Len() > 0 {
						reflectValue := rel.FieldSchema.MakeSlice().Elem()
						reflectValue.SetLen(rv.Len())
						for i := 0; i < rv.Len(); i++ {

	}

	AssertEqual(t, result, user)

	users := []User{
		*GetUser("scan_null_value_for_slice_1", Config{}),
		*GetUser("scan_null_value_for_slice_2", Config{}),
		*GetUser("scan_null_value_for_slice_3", Config{}),
	}
	DB.Create(&users)

	if err := DB.Model(&users[0]).Update("age", nil).Error; err != nil {

		schema.guessRelation(relation, field, guessBelongs)
	} else {
		switch field.IndirectFieldType.Kind() {
		case reflect.Struct:
			schema.guessRelation(relation, field, guessGuess)
		case reflect.Slice:
			schema.guessRelation(relation, field, guessHas)
		default:
			schema.err = fmt.Errorf("unsupported data type %v for %v on field %s", relation.FieldSchema, schema,
				field.Name)
		}
	}

		if field.HasDefaultValue && !skipParseDefaultValue && field.DataType == Time {
			if t, err := now.Parse(field.DefaultValue); err == nil {
				field.DefaultValueInterface = t
			}
		}
	case reflect.Array, reflect.Slice:
		if reflect.Indirect(fieldValue).Type().Elem() == ByteReflectType && field.DataType == "" {
			field.DataType = Bytes
		}
	}

	if dataTyper, ok := fieldValue.Interface().(GormDataTypeInterface); ok {