StructScan into array of string

[dennissetiawan]

I have this snippet of code that works correctly when scanning varchar[] into []string in postgresql

type OrderDB struct {
	ID                string               `db:"id"`
	Users     []string             `db:"users"`
}

rows, err := tx.QueryxContext(ctx, query, args...)
	if err != nil {
		return nil, tracerr.Wrap(err)
	}
	defer rows.Close()

	var orderDB OrderDB

	for rows.Next() {
		err = rows.Scan(
			&orderDB.ID,
			pq.Array(&orderDB.Users),
		)
		if err != nil {
			return nil, tracerr.Wrap(err)
		}

	}

But i want to use StructScan instead, what should i do?
I know that we can make an alias for []string and implement the Scan method like

type StringArrayDB []string
func (u *StringArrayDB) Scan(v interface{}) error {
	return pq.GenericArray{A: u}.Scan(v)
}

but i still got error like
pq: parsing array element index 0: pq: scanning to string is not implemented; only sql.Scanner,

what should i do? and i think this should be handled in structscan?