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// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
// NestedQuery allows to query nested objects / docs.
// The query is executed against the nested objects / docs as if they were
// indexed as separate docs (they are, internally) and resulting in the
// root parent doc (or parent nested mapping).
//
// For more details, see
// https://www.elastic.co/guide/en/elasticsearch/reference/6.0/query-dsl-nested-query.html
type NestedQuery struct {
query Query
path string
scoreMode string
boost *float64
queryName string
innerHit *InnerHit
ignoreUnmapped *bool
}
// NewNestedQuery creates and initializes a new NestedQuery.
func NewNestedQuery(path string, query Query) *NestedQuery {
return &NestedQuery{path: path, query: query}
}
// ScoreMode specifies the score mode.
func (q *NestedQuery) ScoreMode(scoreMode string) *NestedQuery {
q.scoreMode = scoreMode
return q
}
// Boost sets the boost for this query.
func (q *NestedQuery) Boost(boost float64) *NestedQuery {
q.boost = &boost
return q
}
// QueryName sets the query name for the filter that can be used
// when searching for matched_filters per hit
func (q *NestedQuery) QueryName(queryName string) *NestedQuery {
q.queryName = queryName
return q
}
// InnerHit sets the inner hit definition in the scope of this nested query
// and reusing the defined path and query.
func (q *NestedQuery) InnerHit(innerHit *InnerHit) *NestedQuery {
q.innerHit = innerHit
return q
}
// IgnoreUnmapped sets the ignore_unmapped option for the filter that ignores
// unmapped nested fields
func (q *NestedQuery) IgnoreUnmapped(value bool) *NestedQuery {
q.ignoreUnmapped = &value
return q
}
// Source returns JSON for the query.
func (q *NestedQuery) Source() (interface{}, error) {
query := make(map[string]interface{})
nq := make(map[string]interface{})
query["nested"] = nq
src, err := q.query.Source()
if err != nil {
return nil, err
}
nq["query"] = src
nq["path"] = q.path
if q.scoreMode != "" {
nq["score_mode"] = q.scoreMode
}
if q.boost != nil {
nq["boost"] = *q.boost
}
if q.queryName != "" {
nq["_name"] = q.queryName
}
if q.ignoreUnmapped != nil {
nq["ignore_unmapped"] = *q.ignoreUnmapped
}
if q.innerHit != nil {
src, err := q.innerHit.Source()
if err != nil {
return nil, err
}
nq["inner_hits"] = src
}
return query, nil
}
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