Method Project

datastore/query.go:195–199

Project returns a derivative query that yields only the given fields. It cannot be used with KeysOnly.

(fieldNames ...string)

// Project returns a derivative query that yields only the given fields. It
// cannot be used with KeysOnly.
func (q *Query) Project(fieldNames ...string) *Query {
	q = q.clone()
	q.projection = append([]string(nil), fieldNames...)
	return q
}

// Distinct returns a derivative query that yields de-duplicated entities with
// respect to the set of projected fields. It is only used for projection