Query a nested JSON Object/Array with underscore

Question

Assumed that is the JSON structure:

var myData = [
  {
    "id": 68,
    "country": "US",
  },
  {
    "id": 82,
    "country": "PL",
  },
  {
    "id": 83,
    "country": "US",
  }
];

I want to get all items, where country == US

Following try does not work:

var myResult = _.where (myData, {'country': 'US'});

I get an empty result > myResult []

What is the mistake?

EDIT: Sorry, the use of lodash and underscore together was the problem !

Take a look at this topic: stackoverflow.com/questions/23720988/… — Merijndk
– Merijndk, Commented Feb 15, 2016 at 0:28
I am looking for a underscore solution, other libraries are out of the scope,.. — user2227400
– user2227400, Commented Feb 15, 2016 at 0:30
There is nothing wrong with the code posted in the OP, see this: jsfiddle.net/cyqzan1a. Something else is wrong here. Post more code. — danludwig
– danludwig, Commented Feb 15, 2016 at 0:37
The only thing that may be wrong here is that the OP is actually using the latest version of lodash (v4.3.0) which is sometimes confused with underscore. _.where does not exists in that version of lodash, but does in previous versions. — KevBot
– KevBot, Commented Feb 15, 2016 at 0:42

Community · Accepted Answer · 2020-06-20 09:12:55Z

2

I never used underscore.js before, but I have tried your code and it works totally.

Please make sure that you are importing the library.

I have used the next code in the body tag of an empty HTML file:

<script src="http://underscorejs.org/underscore-min.js"></script>
<script>
    var myData = [
      {
        "id": 68,
        "country": "US",
      },
      {
        "id": 82,
        "country": "PL",
      },
      {
        "id": 83,
        "country": "US",
      }
    ];

    var myResult = _.where (myData, {'country': 'US'});
    console.log(myResult);
</script>

And the result is:

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Feb 15, 2016 at 0:35

JCarlosR

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