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110 lines
2.6 KiB
110 lines
2.6 KiB
// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package es
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import "errors"
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// ScriptScoreQuery uses a script to provide a custom score for returned documents.
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//
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// A ScriptScoreQuery query is useful if, for example, a scoring function is
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// expensive and you only need to calculate the score of a filtered set of documents.
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//
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// For more details, see
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// https://www.elastic.co/guide/en/elasticsearch/reference/7.4/query-dsl-script-score-query.html
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type ScriptScoreQuery struct {
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query Query
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script *Script
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minScore *float64
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boost *float64
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queryName string
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}
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// NewScriptScoreQuery creates and initializes a new script_score query.
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func NewScriptScoreQuery(query Query, script *Script) *ScriptScoreQuery {
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return &ScriptScoreQuery{
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query: query,
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script: script,
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}
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}
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// Query to be used in the ScriptScoreQuery.
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func (q *ScriptScoreQuery) Query(query Query) *ScriptScoreQuery {
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q.query = query
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return q
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}
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// Script to calculate the score.
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func (q *ScriptScoreQuery) Script(script *Script) *ScriptScoreQuery {
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q.script = script
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return q
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}
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// MinScore sets the minimum score.
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func (q *ScriptScoreQuery) MinScore(minScore float64) *ScriptScoreQuery {
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q.minScore = &minScore
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return q
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}
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// Boost sets the boost for this query.
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func (q *ScriptScoreQuery) Boost(boost float64) *ScriptScoreQuery {
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q.boost = &boost
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return q
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}
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// QueryName sets the query name for the filter.
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func (q *ScriptScoreQuery) QueryName(queryName string) *ScriptScoreQuery {
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q.queryName = queryName
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return q
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}
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// Source returns JSON for the function score query.
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func (q *ScriptScoreQuery) Source() (interface{}, error) {
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// {
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// "script_score" : {
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// "query" : {
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// "match" : { "message": "elasticsearch" }
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// },
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// "script" : {
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// "source" : "doc['likes'].value / 10"
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// }
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// }
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// }
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source := make(map[string]interface{})
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query := make(map[string]interface{})
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source["script_score"] = query
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if q.query == nil {
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return nil, errors.New("ScriptScoreQuery: Query is missing")
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}
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if q.script == nil {
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return nil, errors.New("ScriptScoreQuery: Script is missing")
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}
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if src, err := q.query.Source(); err != nil {
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return nil, err
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} else {
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query["query"] = src
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}
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if src, err := q.script.Source(); err != nil {
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return nil, err
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} else {
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query["script"] = src
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}
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if v := q.minScore; v != nil {
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query["min_score"] = *v
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}
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if v := q.boost; v != nil {
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query["boost"] = *v
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}
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if q.queryName != "" {
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query["_name"] = q.queryName
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}
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return source, nil
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}
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