if err = checkPathLength(dirPath); err != nil {
		return err
	}

	if err = reliableRemoveAll(dirPath); err != nil {
		switch {
		case isSysErrNotDir(err):
			// File path cannot be verified since one of
			// the parents is a file.
			return errFileAccessDenied
		case isSysErrPathNotFound(err):
			// This is a special case should be handled only for
			// windows, because windows API does not return "not a

	Coupon   *Coupon
	CouponID string
}

type Parent struct {
	gorm.Model
	FavChildID uint
	FavChild   *Child
	Children   []*Child
}

type Child struct {
	gorm.Model
	Name     string
	ParentID *uint
	Parent   *Parent

	}
	return fd, nil
}

// Forked from Golang but chooses to avoid performing lookup
//
// osMkdirAll creates a directory named path,
// along with any necessary parents, and returns nil,
// or else returns an error.
// The permission bits perm (before umask) are used for all
// directories that MkdirAll creates.
// If path is already a directory, MkdirAll does nothing
// and returns nil.

		return nil, osErrToFileErr(err)
	}

	w, err := OpenFile(filePath, mode, 0o666)
	if err != nil {
		// File path cannot be verified since one of the parents is a file.
		switch {
		case isSysErrIsDir(err):
			return nil, errIsNotRegular
		case osIsPermission(err):
			return nil, errFileAccessDenied
		case isSysErrNotDir(err):

}

func TestSaveHasManyCircularReference(t *testing.T) {
	parent := Parent{}
	DB.Create(&parent)

	child := Child{ParentID: &parent.ID, Parent: &parent, Name: "HasManyCircularReference"}
	child1 := Child{ParentID: &parent.ID, Parent: &parent, Name: "HasManyCircularReference1"}

	parent.Children = []*Child{&child, &child1}
	DB.Save(&parent)

	var children []*Child

	}

	var parents []ItemParent
	if err := tx.Find(&parents).Error; err != nil {
		t.Errorf("failed to find item parent, got error: %v", err)
	}
	if len(parents) != 1 {
		t.Errorf("expected %d parents, got %d", 1, len(parents))
	}

	// test delete
	if err := tx.Model(&item).Association("ItemParent").Unscoped().Delete(&parents); err != nil {