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"`

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
	}

const (
	UnixTime        TimeType = 1
	UnixSecond      TimeType = 2
	UnixMillisecond TimeType = 3
	UnixNanosecond  TimeType = 4
)

// GORM fields types
const (
	Bool   DataType = "bool"
	Int    DataType = "int"
	Uint   DataType = "uint"
	Float  DataType = "float"
	String DataType = "string"
	Time   DataType = "time"
	Bytes  DataType = "bytes"
)

const DefaultAutoIncrementIncrement int64 = 1

	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 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;"`

	AssertEqual(t, newUser.CreatedAt, curTime)
	AssertEqual(t, newUser.UpdatedAt, curTime)
}

func TestCreateWithNoGORMPrimaryKey(t *testing.T) {
	type JoinTable struct {
		UserID   uint
		FriendID uint
	}

	DB.Migrator().DropTable(&JoinTable{})
	if err := DB.AutoMigrate(&JoinTable{}); err != nil {
		t.Errorf("no error should happen when auto migrate, but got %v", err)
	}

	}
}

func TestMigrateIgnoreRelations(t *testing.T) {
	type RelationModel1 struct {
		ID uint
	}
	type RelationModel2 struct {
		ID uint
	}
	type RelationModel3 struct {
		ID               uint
		RelationModel1ID uint
		RelationModel1   *RelationModel1
		RelationModel2ID uint
		RelationModel2   *RelationModel2 `gorm:"-:migration"`
	}

	var err error

)

type Blog struct {
	ID         uint   `gorm:"primary_key"`
	Locale     string `gorm:"primary_key"`
	Subject    string
	Body       string
	Tags       []Tag `gorm:"many2many:blog_tags;"`
	SharedTags []Tag `gorm:"many2many:shared_blog_tags;ForeignKey:id;References:id"`
	LocaleTags []Tag `gorm:"many2many:locale_blog_tags;ForeignKey:id,locale;References:id"`
}

type Tag struct {
	ID     uint   `gorm:"primary_key"`

		t.Errorf("found invalid user, got %v, expect %v", u, user)
	}

	result := struct {
		ID   int
		Name string
	}{}
	if err := gorm.G[User](DB).Where("name = ?", user.Name).Scan(ctx, &result); err != nil {
		t.Fatalf("failed to scan user, got error: %v", err)
	} else if result.Name != user.Name || uint(result.ID) != user.ID {
		t.Errorf("found invalid user, got %v, expect %v", result, user)
	}

// that the first byte can only be either 0x80 or 0xff. Thus, the first byte is
// equivalent to the sign bit in two's complement form.
func fitsInBase256(n int, x int64) bool {
	binBits := uint(n-1) * 8
	return n >= 9 || (x >= -1<<binBits && x < 1<<binBits)
}

// parseNumeric parses the input as being encoded in either base-256 or octal.
// This function may return negative numbers.