Node.js: parsing JSON object from an Elasticsearch query

Question

I have an elasticsearch database that I access through a node.js client. I can parse the JSON from elasticsearch to print out the hitsArray which looks like below:

[ { _index: 'parties',
    _type: 'suppliers',
    _id: 'AV0uELknL82XeGsCOZ-i',
    _score: 1,
    _source: { name: 'Jabil', address: [Object], rating: 4.2 } },
  { _index: 'parties',
    _type: 'suppliers',
    _id: 'AV0t_yC3L82XeGsCOZ-f',
    _score: 1,
    _source: { name: 'Apple', address: [Object], rating: 4.9 } },
  { _index: 'parties',
    _type: 'suppliers',
    _id: 'AV0t_glkL82XeGsCOZ-d',
    _score: 1,
    _source: { name: 'Flextronics', address: [Object], rating: 4.5 } },
  { _index: 'parties',
    _type: 'suppliers',
    _id: 'AV0t_ox7L82XeGsCOZ-e',
    _score: 1,
    _source: { name: 'FlashMob', address: [Object], rating: 3.5 } } ]

Now, I want to parse the _source field and print out the name field

client.search(searchParams).then(function (resp) {
    return Promise.all(resp.hits.hits)
  }).then(function(hitsArray){
    hitsArray.forEach(function(value){
      JSONObject first = hitsArray.getJSONObject(value);
      JSONObject source = first.getJSONObject("_source");
      String name = source.getString("name");
      console.log(name);
    });
  });

But I am getting error

JSONObject first = hitsArray.getJSONObject(value);
               ^^^^^
SyntaxError: Unexpected identifier

What am I missing? any suggestion?

You can use underscore.js for this purpose . it is already implemented in there. May be it can be of some help — Kartikeya Sharma
– Kartikeya Sharma, Commented Jul 11, 2017 at 5:24

mscdex · Accepted Answer · 2017-07-11 05:24:47Z

2

JavaScript has no explicit type definitions like that. It looks like those 3 lines may be Java code and not JavaScript code.

As far as getting the actual JavaScript value goes, it appears to already be an object. Just access it with value._source (and value._source.name).

answered Jul 11, 2017 at 5:24

mscdex

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