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utils/pkg/es/search_queries_match_all.go

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1.7 KiB

// 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 es
import "encoding/json"
var nilByte = []byte("null")
// MatchAllQuery is the most simple query, which matches all documents,
// giving them all a _score of 1.0.
//
// For more details, see
// https://www.elastic.co/guide/en/elasticsearch/reference/7.0/query-dsl-match-all-query.html
type MatchAllQuery struct {
boost *float64
queryName string
}
// NewMatchAllQuery creates and initializes a new match all query.
func NewMatchAllQuery() *MatchAllQuery {
return &MatchAllQuery{}
}
// Boost sets the boost for this query. Documents matching this query will
// (in addition to the normal weightings) have their score multiplied by the
// boost provided.
func (q *MatchAllQuery) Boost(boost float64) *MatchAllQuery {
q.boost = &boost
return q
}
// QueryName sets the query name.
func (q *MatchAllQuery) QueryName(name string) *MatchAllQuery {
q.queryName = name
return q
}
// Source returns JSON for the match all query.
func (q *MatchAllQuery) Source() (interface{}, error) {
// {
// "match_all" : { ... }
// }
source := make(map[string]interface{})
params := make(map[string]interface{})
source["match_all"] = params
if q.boost != nil {
params["boost"] = *q.boost
}
if q.queryName != "" {
params["_name"] = q.queryName
}
return source, nil
}
// MarshalJSON enables serializing the type as JSON.
func (q *MatchAllQuery) MarshalJSON() ([]byte, error) {
if q == nil {
return nilByte, nil
}
src, err := q.Source()
if err != nil {
return nil, err
}
return json.Marshal(src)
}