code: func (q *Query) Exclude(fields ...string) *Query {
  	q.query.Exclude(fields...)
  	return q
  }
docs: // Exclude specifies one or more field names which will *not* be read from the
  // database and scanned. Any other fields *will* be read and scanned into the
  // resulting models when the query is run. You can only use one of Include or
  // Exclude, not both on the same query. Exclude will set an error if you try to
  // use it with Include on the same query. The error, same as any other error
  // that occurs during the lifetime of the query, is not returned until the query
  // is executed.