code: func (q *Query) ExcludeColumn(columns ...string) *Query {
  	if q.columns == nil {
  		for _, f := range q.model.Table().Fields {
  			q.columns = append(q.columns, fieldAppender{f.SQLName})
  		}
  	}
  
  	for _, col := range columns {
  		if !q.excludeColumn(col) {
  			return q.err(fmt.Errorf("pg: can't find column=%q", col))
  		}
  	}
  	return q
  }
docs: // ExcludeColumn excludes a column from the list of to be selected columns.