HasChildQuery (joining-queries/has-child-query.js)

A query builder for Elasticsearch's has_child query used to find parent documents that have matching child documents.

// Source: https://github.com/sudo-suhas/elastic-builder | License: MIT | Copyright 2017 Suhas Karanth
// Provided via justclaw.it.com; keep this notice with the code.
'use strict';

const _ = require('../../_');

const JoiningQueryBase = require('./joining-query-base');

const ES_REF_URL =
    'https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-has-child-query.html';

/**
 * The `has_child` filter accepts a query and the child type to run against, and
 * results in parent documents that have child docs matching the query.
 *
 * [Elasticsearch reference](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-has-child-query.html)
 *
 * @example
 * // Scoring support
 * const qry = esb.hasChildQuery(
 *     esb.termQuery('tag', 'something'),
 *     

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