Javascript函数返回Elasticsearch结果 [英] Javascript function to return Elasticsearch results

问题描述

我正在尝试编写一个JavaScript函数，该函数返回Elasticsearch v5查询的结果.我不知道在哪里以及如何在此代码中包括返回".使用以下命令，segmentSearch(id)返回一个Promise对象， {_ 45:0，_81:0，_65:null，_54:null} ._65包含正确匹配的数组，但是我不知道如何解析它.console.log(hits)产生相同的数组，但是如何从函数中返回它呢?

I'm trying to write a JavaScript function that returns results of an Elasticsearch v5 query. I can't figure out where and how to include 'return' in this code. With the following, segmentSearch(id) returns a Promise object,{_45: 0, _81: 0, _65: null, _54: null}. _65 holds an array of the correct hits, but I can't figure out how to parse it. The console.log(hits) produces that same array, but how can I return it from the function?

var elasticsearch = require('elasticsearch');
var client = new elasticsearch.Client({
  host: 'localhost:9200',
  log: 'trace'
});

segmentSearch = function(id){
  var searchParams = {
    index: 'myIndex',
    type: 'segment',
    body: {
      query: {
        nested : {
            path : "properties",
            query : {
               match : {"properties.source" : id }
            },
            inner_hits : {}
        }
      }
    }
  }
  return client.search(searchParams).then(function (resp) {
    var hits = resp.hits.hits;
    console.log('hits: ',hits)
    return hits;
  }, function (err) {
    console.trace(err.message);
  });
}

推荐答案

我将在client.search函数之外在全局范围和array中实例化一个新数组.按"hits"，然后访问新填充的数组.>

I would instanitate a new array outside of your client.search function in global scope and array.push your 'hits' Then access your newly filled array.

let newArr = [];
client.search(searchParams).then(function (resp) {
for(let i = 0; i < resp.hits.hits.length; i++){
newArr.push(resp.hits.hits[i]);
}
console.log('hits: ',newArr)
return newArr;
}, function (err) {
console.trace(err.message);
});

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