"created_at": time.Now(),
		"updated_at": nil,
		"deleted_at": time.Now(),
		"age":        20,
		"birthday":   time.Now(),
		"active":     f,
	}

	for k, v := range newValues {
		if err := userSchema.FieldsByDBName[k].Set(context.Background(), reflectValue, v); err != nil {
			t.Errorf("no error should happen when assign value to field %v, but got %v", k, err)
		}
	}
	newValues["updated_at"] = time.Time{}

			if v, ok := schema.FieldsByDBName[field.DBName]; !ok || ((field.Creatable || field.Updatable || field.Readable) && len(field.BindNames) < len(v.BindNames)) {
				if _, ok := schema.FieldsByDBName[field.DBName]; !ok {
					schema.DBNames = append(schema.DBNames, field.DBName)
				}
				schema.FieldsByDBName[field.DBName] = field
				schema.FieldsByName[field.Name] = field

		if f.TagSettings == nil {
			if f.Tag != "" {
				f.TagSettings = schema.ParseTagSetting(f.Tag.Get("gorm"), ";")
			} else {
				f.TagSettings = map[string]string{}
			}
		}

		parsedField, ok := s.FieldsByDBName[f.DBName]
		if !ok {
			parsedField, ok = s.FieldsByName[f.Name]
		}

		if !ok {
			t.Errorf("schema %v failed to look up field with name %v", s, f.Name)
		} else {

		)
		stmt.Settings.Delete("gorm:update_track_time")

		values = clause.Values{Columns: make([]clause.Column, 0, len(stmt.Schema.DBNames))}

		for _, db := range stmt.Schema.DBNames {
			if field := stmt.Schema.FieldsByDBName[db]; !field.HasDefaultValue || field.DefaultValueInterface != nil {
				if v, ok := selectColumns[db]; (ok && v) || (!ok && (!restricted || field.AutoCreateTime > 0 || field.AutoUpdateTime > 0)) {

}

// ParseCheckConstraints parse schema check constraints
func (schema *Schema) ParseCheckConstraints() map[string]CheckConstraint {
	checks := map[string]CheckConstraint{}
	for _, field := range schema.FieldsByDBName {
		if chk := field.TagSettings["CHECK"]; chk != "" {
			names := strings.Split(chk, ",")
			if len(names) > 1 && regEnLetterAndMidline.MatchString(names[0]) {

				updatingSchema = updatingStmt.Schema
				isDiffSchema = true
			}
		}

		switch updatingValue.Kind() {
		case reflect.Struct:
			set = make([]clause.Assignment, 0, len(stmt.Schema.FieldsByDBName))
			for _, dbName := range stmt.Schema.DBNames {
				if field := updatingSchema.LookUpField(dbName); field != nil {
					if !field.PrimaryKey || !updatingValue.CanAddr() || stmt.Dest != stmt.Model {

						// not found, add column
						if err = execTx.Migrator().AddColumn(value, dbName); err != nil {
							return err
						}
					} else {
						// found, smartly migrate
						field := stmt.Schema.FieldsByDBName[dbName]
						if err = execTx.Migrator().MigrateColumn(value, field, foundColumn); err != nil {
							return err
						}
					}
				}

				}
				return !zero && !utils.AssertEqual(changedValue, fieldValue)
			}
		}
		return false
	}

	if len(fields) == 0 {
		for _, field := range stmt.Schema.FieldsByDBName {
			if changed(field) {
				return true
			}
		}
	} else {
		for _, name := range fields {
			if field := stmt.Schema.LookUpField(name); field != nil {
				if changed(field) {
					return true