code: func FindOneTo(db *reform.Querier,
  	str reform.Struct, column string, arg interface{}) error {
  	if err := db.FindOneTo(str, column, arg); err != nil {
  		return fmt.Errorf("failed to find %T by '%s' column: %s",
  			str, column, err)
  	}
  	return nil
  }
docs: // FindOneTo calls db.FindOneTo() returning more descriptive error.