Value:  clause.Column{Table: tableAliasName, Name: ref.ForeignKey.DBName},
									}
								} else {
									if ref.PrimaryValue == "" {
										exprs[idx] = clause.Eq{
											Column: clause.Column{Table: parentTableName, Name: ref.ForeignKey.DBName},
											Value:  clause.Column{Table: tableAliasName, Name: ref.PrimaryKey.DBName},
										}
									} else {

			}

			for _, field := range stmt.Schema.FieldsWithDefaultDBValue {
				if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) && field.DefaultValueInterface == nil {
					if rvOfvalue, isZero := field.ValueOf(stmt.Context, stmt.ReflectValue); !isZero {
						values.Columns = append(values.Columns, clause.Column{Name: field.DBName})
						values.Values[0] = append(values.Values[0], rvOfvalue)
					}
				}
			}
		default:

}

// ParseUniqueConstraints parse schema unique constraints
func (schema *Schema) ParseUniqueConstraints() map[string]UniqueConstraint {
	uniques := make(map[string]UniqueConstraint)
	for _, field := range schema.Fields {
		if field.Unique {
			name := schema.namer.UniqueName(schema.Table, field.DBName)
			uniques[name] = UniqueConstraint{Name: name, Field: field}
		}

			}
		}

		if !stmt.SkipHooks && stmt.Schema != nil {
			for _, dbName := range stmt.Schema.DBNames {
				field := stmt.Schema.LookUpField(dbName)
				if field.AutoUpdateTime > 0 && value[field.Name] == nil && value[field.DBName] == nil {
					if v, ok := selectColumns[field.DBName]; (ok && v) || !ok {
						now := stmt.DB.NowFunc()
						assignValue(field, now)

			if f.DBName != "" {
				if field, ok := s.FieldsByDBName[f.DBName]; !ok || parsedField != field {
					t.Errorf("schema %v failed to look up field with dbname %v", s, f.DBName)
				}
			}

			for _, name := range []string{f.DBName, f.Name} {
				if name != "" {
					if field := s.LookUpField(name); field == nil || (field.Name != name && field.DBName != name) {

				)
				for _, dbName := range stmt.Schema.DBNames {
					var foundColumn gorm.ColumnType

					for _, columnType := range columnTypes {
						if columnType.Name() == dbName {
							foundColumn = columnType
							break
						}
					}

					if foundColumn == nil {
						// not found, add column
						if err = execTx.Migrator().AddColumn(value, dbName); err != nil {
							return err

		{Name: "DeletedAt", DBName: "deleted_at", BindNames: []string{"Model", "DeletedAt"}, Tag: `gorm:"index"`, DataType: schema.Time},
		{Name: "Name", DBName: "name", BindNames: []string{"Name"}, DataType: schema.String},
		{Name: "Age", DBName: "age", BindNames: []string{"Age"}, DataType: schema.Uint, Size: 64},
		{Name: "Birthday", DBName: "birthday", BindNames: []string{"Birthday"}, DataType: schema.Time},

								rel = rel.FieldSchema.Relationships.Relations[name]
								relFields = append(relFields, rel.Field)
							}
							// lastest name is raw dbname
							dbName := names[subNameCount-1]
							if field := rel.FieldSchema.LookUpField(dbName); field != nil && field.Readable {
								fields[idx] = field

								if len(joinFields) == 0 {
									joinFields = make([][]*schema.Field, len(columns))
								}

	}

	fields := []*schema.Field{
		{Name: "ID", DBName: "id", BindNames: []string{"ID"}, DataType: schema.Uint, PrimaryKey: true, Size: 64, Creatable: true, Updatable: true, Readable: true, HasDefaultValue: true, AutoIncrement: true},
		{Name: "Name", DBName: "", BindNames: []string{"Name"}, DataType: "", Tag: `gorm:"-"`, Creatable: false, Updatable: false, Readable: false},

			notRestricted = result
			for _, dbName := range stmt.Schema.DBNames {
				results[dbName] = result
			}
		} else if column == clause.Associations {
			for _, rel := range stmt.Schema.Relationships.Relations {
				results[rel.Name] = result
			}
		} else if field := stmt.Schema.LookUpField(column); field != nil && field.DBName != "" {
			results[field.DBName] = result