code: func (r *Release) Select(tx *sql.Tx) error {
  	if !r.validBundle() {
  		return r.errInvalidBundle()
  	}
  
  	query := fmt.Sprintf("SELECT released_at FROM %s_releases WHERE version=?", r.table())
  	row := tx.QueryRow(query, r.Version)
  	return row.Scan(&r.ReleasedAt)
  }
docs: // Select requires the Version field to have been populated.