type (
		Level0 struct {
			ID       uint
			Value    string
			Level1ID uint
		}
		Level1 struct {
			ID         uint
			Value      string
			Level2ID   *uint
			Level2_1ID *uint
			Level0s    []Level0 `json:",omitempty"`
		}
		Level2 struct {
			ID       uint
			Level1s  []Level1
			Level3ID uint
		}
		Level2_1 struct {
			ID       uint
			Level1s  []Level1 `json:",omitempty"`

type User struct {
	gorm.Model
	Name      string
	Age       uint
	Birthday  *time.Time
	Account   Account
	Pets      []*Pet
	NamedPet  *Pet
	Toys      []Toy   `gorm:"polymorphic:Owner"`
	Tools     []Tools `gorm:"polymorphicType:Type;polymorphicId:CustomID"`
	CompanyID *int
	Company   Company
	ManagerID *uint
	Manager   *User
	Team      []User     `gorm:"foreignkey:ManagerID"`

func TestCompositePrimaryKeyWithAutoIncrement(t *testing.T) {
	type Product struct {
		ProductID    uint `gorm:"primaryKey;autoIncrement"`
		LanguageCode uint `gorm:"primaryKey"`
		Code         string
		Name         string
	}
	type ProductNonAutoIncrement struct {
		ProductID    uint `gorm:"primaryKey;autoIncrement:false"`
		LanguageCode uint `gorm:"primaryKey"`
		Code         string
		Name         string
	}

	type Toy struct {
		ID        int
		Name      string
		OwnerID   int
		OwnerType string
	}
	type User struct {
		ID  int
		Cat struct {
			Name string
			Toy  Toy   `gorm:"polymorphic:Owner;"`
			Toys []Toy `gorm:"polymorphic:Owner;"`
		} `gorm:"embedded;embeddedPrefix:cat_"`
		Dog struct {
			ID     int
			Name   string
			UserID int
			Toy    Toy   `gorm:"polymorphic:Owner;"`

	type (
		Preload struct {
			ID       uint
			Value    string
			NestedID uint
		}
		Join struct {
			ID       uint
			Value    string
			NestedID uint
		}
		Nested struct {
			ID       uint
			Preloads []*Preload
			Join     Join
			ValueID  uint
		}
		Value struct {
			ID     uint
			Name   string
			Nested Nested
		}
	)

		switch lowerVal {
		case Bool, Int, Uint, Float, String, Time, Bytes:
			field.DataType = lowerVal
		default:
			field.DataType = DataType(val)
		}
	}

	if field.Size == 0 {
		switch reflect.Indirect(fieldValue).Kind() {
		case reflect.Int, reflect.Int64, reflect.Uint, reflect.Uint64, reflect.Float64:
			field.Size = 64
		case reflect.Int8, reflect.Uint8:
			field.Size = 8

	type (
		Furniture struct {
			gorm.Model
			OwnerID *uint
		}

		Owner struct {
			gorm.Model
			Furnitures []Furniture
			CompanyID  *uint
			Company    Company
		}

		Building struct {
			gorm.Model
			Name    string
			OwnerID *uint
			Owner   Owner
		}
	)

	DB.Migrator().DropTable(&Building{}, &Owner{}, &Furniture{})

	}

	type NestedEmbeddedStruct struct {
		NestedEmbeddedIntField            int
		NestedEmbeddedIntFieldWithDefault int `gorm:"default:2"`
	}

	type EmbeddedStruct struct {
		EmbeddedIntField     int
		NestedEmbeddedStruct `gorm:"embedded"`
	}

	type EmbeddedPtrStruct struct {
		EmbeddedPtrIntField   int
		*NestedEmbeddedStruct `gorm:"embedded"`
	}

	type Result struct {

	rv := reflect.ValueOf(fieldValue)
	switch v := fieldValue.(type) {
	case int64, int, uint, uint64, int32, uint32, int16, uint16:
		result = time.Unix(reflect.Indirect(rv).Int(), 0).UTC()
	case *int64, *int, *uint, *uint64, *int32, *uint32, *int16, *uint16:
		if rv.IsZero() {
			return nil, nil
		}
		result = time.Unix(reflect.Indirect(rv).Int(), 0).UTC()
	default:

// RegEx matches only numeric values
var numericPlaceholderRe = regexp.MustCompile(`\$\d+\$`)

func isNumeric(k reflect.Kind) bool {
	switch k {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return true
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return true
	case reflect.Float32, reflect.Float64:
		return true
	default:
		return false
	}
}